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Showing posts with label Science. Show all posts
Showing posts with label Science. Show all posts

Saturday, 27 November 2021

Science: Germination Experiment

For the past few weeks in Science, we have been doing an experiment around Germination. Germination is the name of the process where a plant grows from a seed.

Aim: To observe and record germination in bean seed.

Equipment: 200 mL beaker, newspaper, water, bean seed.

Method: 
1.) Get a newspaper and stuff it inside the beaker. Make sure it covers the edges and the bottom of the glass. 
2.) Get a pencil and poke the newspaper on the side to make an opening and place your bean seed inside it.
3.) Pour a decent amount of water into the beaker and wait for 1 or 2 weeks for the bean to germinate.

Observations/Results:

Conclusion:
I think the whole experiment was fun and it went well. It never failed to amuse me to watch the growth of the bean into a plant every day. I watched the bean grow from the embryo stage into a full developed plant.

Tuesday, 21 September 2021

Science: Geological Timescale (SciPad work)

Greetings. Today in Science Biology we learnt about the geological timescale. We made a timeline showing how life on Earth has changed over the past 4,600 million years.


Monday, 6 September 2021

Science: Mutations

This week in Science Biology, we are learning about mutations. Mutations are basically permanent changes in the base sequence of DNA that produces a different outcome on the organism.

The human species first appeared in what is now called Africa. They were dark-skinned, dark-haired and dark coloured eyes. But in the present times, we now have a range of different colours of skin, hair and eyes. Therefore, Blue eyes are basically a new allele = mutation. Blue eyes first appear in humans about 6,000 to 10,000 years ago.

It is a beneficial mutation because blue-eyed humans get the advantage of coping better with seasonal affective disorder. A disorder that occurs when there is less sunlight at certain times of the year.

It also has the advantage of seeing unmoving objects better than moving things. Blue-eyed humans can also see better in the dark because lighter pigment makes the iris more translucent meaning it lets get more light into the eye.

Bonus:
Blue eyes may have more advantages because based on societies' beauty standards blue eyes may appear more appealing and look attractive and fascinating than the common eye colours in the world today which is dark-brown.

Tuesday, 31 August 2021

Science: Dominant and Recessive Allele

Hi, This week in Science Biology we are learning about the Dominant and Recessive Allele on humans and animals. 

Science Lockdown Weekly Question: 
We have some sheep here at home who have just had lambs. The mums have white wool, the dad also has white wool. But we have two mums who have had twins - one of the twins has white wool and one has black wool. Using terms like allele and dominant and recessive try and explain how this can happen - use a Punnett square too if you want. 

My Answer:
White wool is the dominant allele The black wool is the recessive allele.
This means there was a high chance of having a white wool lamb considering both parents were white wool genes.

Now, in this case, this has happened because...
It is due to both of the parent sheep is a (Ww - white wool but non-purebred sheep)
With the recessive allele in it (w), there is a chance of getting a black wool lamb due to both parents being non-purebred white wool sheep.

Punnet square explanation: 
                   🡫

Tuesday, 17 August 2021

Science: DNA Extraction

Hi, Today in Science we did an experiment where we extract DNA from a Kiwi fruit.

Aim: To extract DNA from kiwifruit

Equipment: Kiwifruit, water, test tube, beakers, salt, dishwashing detergent, ziplock bag, spatula

Method:
1.) Cut the kiwifruit in half and scoop out the kiwi fruit and put it in a ziplock bag.

2.) Crush the kiwifruit inside the ziplock bag until chunks are gone. 

3.) Add 2 pinch of salt and a little bit of water to the mixture and mix it together.

4.) Then pour through cloth, collect the juice in a beaker, then transfer it into a test tube.

5.) After pouring the mixture into the test tube, add Ethanol. Watch the DNA separate and collect the DNA using a spatula.

Results:
After adding Ethanol into the mixture, a complete visible change happened. There appeared two layers in the test tube. At the top is the cloudy looking texture which is the DNA that we are going to fish out. The bottom one is just the neutral mixture. The dishwashing liquid broke the DNA cells of the kiwifruit, then the ethanol separated the DNA.


Conclusion: 
I think the experiment went well and I would like to try out the Strawberry next time. 

Wednesday, 7 July 2021

Science: Speeding Past School

Hi, Today in Science we are conducting an experiment regarding the speed of cars travelling past the school.

Aim: See how many cars are speeding past school

Method: 
1) Measure distance... power pole --> power pole = 50m
2) Time how long it takes a car to travel this distance 
    - "Flag" person indicates when a car passes their pole
    - "Timer" person starts when ⮥ & stops when a car passes their pole
    - "Writer" person writes downtimes
3) Collect 10 times
4) Calculate speed in m/s --> convert to km/hr 
5) Are there any speeders?

Results: 

Speed

Car 1

Car 2

Car 3

Car 4

Car 5

Car 6

Car 7

Car 8

Car 9 

Car 10

Average
Time (s)

4.84

3.80

5.57

5.83

3.80

5.17

3.13

4.90

3.35

4.18

4.457

m/s-1

10.33

13.15

8.97

8.57

13.15

9.67

15.97

10.20

14.92

11.96

11.21

Km/hr-1

37.188

47.34

32.292

30.852

47.34

34.812

57.492

36.72

53.712

43.056

40.36


Conclusion: 
According to the results, none of the cars really passed the average standard speed of 50km/hr on the road. The average speed according to our experiment was 40.36 km/hr. 

Wednesday, 19 May 2021

Science: Metal Challenge

Hello! This week in Science we had a task called 'Metal Challenge'. The task was to work in pairs and pick a specific symbol written on the board. Whatever symbol you picked you to have to research about it and answer the list of question on the slideshow. The purpose of this task is to enhance our knowledge of Metals since we are looking at Metallurgy in Science.

Here's the slideshow I and my partner worked on:

I hope you learned something new and as always have a nice day everybody. 

Monday, 10 May 2021

Science: Metals & Acid

Hello! Today in Science we conducted an experiment. It involves metal and acid.

Aim: To show that hydrogen gas is produced when a metal reacts with acid. 

Equipment: 
A test tube, a boiling tube, Bunsen burner, wooden splint, a bottle of acid. a piece of metal, safety glasses.

Method: 
  1. Light your bunsen burner.
  2. Add your sample of metal to your test tube. Add 2 mL of acid.
  3. Carefully invert the boiling tube above the test tube containing the metal and acid.
  4. Hold the test tubes together for a few minutes, allowing time for the inverted boiling tube to fill with gas.
  5. When you think the tube is full, tilt the boiling tube full of gas upwards and insert the burning splint into the mouth of the test tube.
Observations: It created a sizzle effect when you poured the acid in with the metal. It also made a popping sound the moment you insert the burning splint in the mouth of the test tube. 

1. Outline how you could tell a chemical reaction was occurring in the test tube?
The temperature of the test tube changed and it condensed creating gas to fill inside. As well as the sizzling effect and popping sound. 

Evidence:
(Read more)

Tuesday, 4 May 2021

Science: Corrosion Experiment pt. 1 & pt. 2

CORROSION EXPERIMENT PT. 1

Aim
: To investigate the factors that cause rusting in iron.

Equipment:
  • 8 test tubes
  • test tubes rack
  • a bung
  • 8 iron nails
  • boiled water 
  • tap water
  • salty water
  • cooking oil
  • calcium and chloride 
  • nail polish 
  • vaseline 
  • zinc 
Method:
1.) Label all 8 test tubes A - H

2.) Test tube contents:
A = Nail
B = Tap water + nail
C = Salty water + nail
D = Boiled water, oil + nail
E = CaCl, bung + nail 
F = Water, vaseline + nail
G = Water + painted nail 
H = Zn, water + nail

3.) Leave the test tubes for at least 3 days. 

Hypothesis:  A-C will rust especially C. While D-G is not gonna rust.

Picture of BEFORE:

















______________________

CORROSION EXPERIMENT PT. 2
Preventing Rusting:

Aim: To investigate a number of techniques that may prevent rusting.

Equipment:

  • Four test tubes
  • Test tube rack
  • Bung
  • Four iron nails
  • Boiled water
  • Tap water
  • Vaseline gel
  • Nail
  • Polish or paint
  • Zinc pellets or magnesium ribbon
Methods:
  1. Label four test tubes and place them in a test tube rack.
  2. Fill all test tubes with equal volumes of water - enough to cover the nails.
  3. Test tube contents:
  • A = Iron nail
  • F = Iron nail, water and vaseline
  • G = Iron nail and nail polish
  • H = Iron nail, zinc and water
      4. Leave the test tubes undisturbed for at least three days.

RESULTS:



A = The iron nail rusted.

B = This tube showed the worst reaction as it corroded out of all of them and you could see the orange rust floating in the water.

C = It rusted a bit but it wasn't visible as much. 

D = It was a slightly similar reaction to test tube B but the difference the colour orange wasn't as bold. 

E = This one didn't rust because there was a bung preventing the air coming to the nail which prevents one of the ingredient for it to rust. 

F = Despite the vaseline coating around it, it still rusted and it was visible in the water.

G = It rusted as the paint slowly vanished.

H = Test tube H only rusted a little bit as zinc pellet affected the rusting of it. 

Monday, 12 April 2021

Science Chemistry DLO

こんにちは! In Science, we were set a task to show what we have learned in Chemistry (Acid & Base unit) through a slideshow or a doc. I chose to do a slideshow. We had to pick 4 topics/points. I picked Acid, Base, Alkali and Neutralisation. Here's my work:





Thank you for viewing this post. Have a nice day everyone. =)

Tuesday, 6 April 2021

Science: Making Salts II (Late post)

こんにちは! Yesterday in Science we have continued with our experiment around making salts with acid and bases. Today's blog will be about the experiment of making salts part 2. 

Aim: To produce copper sulfate salt by reacting copper dioxide with an acid.

Hypothesis: By mixing sulfuric acid and copper oxide, a neutralization reaction would occur. Copper sulfate and hydrogen would form.

Equipment:

  • Copper oxide powder
  • Dilute (0.5 mol L-1)
  • Sulfuric acid
  • 50mL measuring cylinder
  • 2 100mL beakers
  • Hot plate
  • Gauze mat
  • Funnel
  • Filter
  • Paper 
  • Thermometer
  • Spatula
  • Evaporating basin
  • Stirring rod

Method

  1. Add 20 mL of sulfuric acid to a 100 mL beaker. Heat the acid until it reaches 70°C. Turn off your bunsen burner (in our case the hot plate). 
  2. Once heated, use a spatula to add pea-sized portions of copper oxide to the beaker. Stir the mixture for 30 seconds.
  3. Repeat step 2 until no more will dissolve. Allow the beaker to cool. 
  4. Fold the filter paper and place it in the funnel. Place the filter funnel into the second beaker. 
  5. Make sure the beaker is cold enough to hold at the top. The contents should still be hot. You may need your teacher to complete this step. 
  6. Gently swirl the contents of the beaker to mix, and then pour into the filter paper in the funnel. Allow filtering through. 
  7. Rinse the beaker you used to heat the mixture previously, and place it back on top of your tripod filled with 50-60mL of water.
  8. Place the evaporating basin on top of the beaker and carefully pour some of the solutions from the beaker into the evaporating basin. 
  9. Gently heat the beaker until the solution in the evaporating basin has reduced by half. 
  10. Leave the evaporating basin to cool. Once cool, move the evaporating basin to a warm place where it will not be disturbed (i.e. a window-sill) and observe over the next few days. Blue copper sulfate crystals should form. 

Observations: When Copper oxide was added to the mixture it turned black but when it was filtered it turned into light blue colour. The smell was quite unpleasant though.

Name of the reaction occurring in step 2: The reaction is called neutralisation. 


A few days after the experiment we left it out to dry for the Easter Holiday. We came back to this result. It formed a blue salt crystal inside the beaker. It was fascinating to see. 

Thank you for reading this post and have a nice day!

Tuesday, 30 March 2021

Science: Making Salts Experiment

Hi, This week in Science we've done an experiment around the Neutralisation of 
acid and base and making salt. 

Aim: The aim of the experiment is to produce sodium chloride salt by carrying out a neutralisation reaction.

Hypothesis: By balancing the mixture of acid and base [NaOH + HCl] we are able to reach neutralisation. Using the method of evaporation we should be able to create sodium chloride.

Equipment: The equipment is as follows:

  • 50 & 200ml beakers.
  • HCl
  • NaOH
  • 25ml measuring cylinder
  • Glass stirring rod
  • Spotting tile
  • Universal indicator solution
  • Hot plate
  • Gauze mat
  • Dropper

Method: 

  1. Using the measuring cylinder measure 10ml of HCl and pour it into your 50ml beaker. 
  2. Add dilute NaOH a few drops at a time while stirring with a glass rod. 
  3. Every 10-15 drops stop adding the NaOH and use a glass stirring rod to transfer a drop of the solution spotting tile. Test its pH using a Universal indicator.
  4. Keep adding NaOH and testing the solution by repeating step 3. As you get closer to neutral you may need to test the solution after every drop.
  5. Pour the neutral solution into an evaporation basin (in our case a different beaker) and evaporate the water from the solution using the equipment shown above.
Observation:  
It was quite challenging to get the neutralisation reaction. It was always turning purple and red somehow. The colours change from Red to Purple quite often which resulting in the failed neutralisation. However, we didn't give up and eventually, we got a neutralisation solution with a colour of green. 

Word Equation:
Acid + Base --------> Salt + H2O   
or
NaOH + HCl -------> NaCl + H2

Tuesday, 16 February 2021

Science: Physical or Chemical Change

Physical or Chemical Change 

こんにちは! Today in Science we are conducting a practical experiment around heating a Zinc Oxide and find out whether it is a Physical or Chemical change.

Hypothesis: My hypothesis is that it will be a Chemical change because it absorbs heat, changes its substance, and is not easily reversible. Heat, Sparks, = Chemical. However, I may end up being wrong.

Equipment:
- Sample of ZnO (Zinc Oxide)
- Heat Source
- Scales
- Heatproof container - Evaporating dish
- Tongs
- Heatproof mat


Method: 
1.) Get a sample of Zno in an evaporating dish (about 3 scoops).
2.) Weigh the Zno + container - record weight.
3) Heat container + Zno on a hot plate.
4.) Observe any changes - use the phone for before and after photos
5.) Take off heat + put on a heatproof mat.
6.) Let cool and observe.
7.) Reweigh

Results: 
After doing the experiment, it turns out that heating Zno didn't change its' substance to liquid and there was barely any change. The only visible change was the change of color from White to Light green. The weight of the object was still the same before and after.


Weighs of the ZnO sample:

Before heating: 36g
After heating: 36g

Conclusion:
In conclusion, I was wrong. It was not a Chemical change. It was a physical change because it was easily reversible to its original color when cooled down. There was no new substance formed and the mass of the object was still the same before and after.

Sunday, 29 November 2020

Hurumanu 2: Digestive System

 Hi everyone! In Hurumanu 2 (Science), we learned about the digestive system and organs that work together to get our digestive system functioning. We are tasked to make a DLO (digital learning object) show our findings or what we have learned. Here, I have made a slideshow presentation to share my learning. I hope you find this helpful and informative. Have a nice day :)

Thursday, 5 November 2020

Plastic Pollution - Essay

Hi everyone! In Hurumanu 1, we've been writing essays about a specific topic we selected relating to sustainability issues. 

Plastic pollution


              Over the years, the number of plastic products being produced, used, and wasted has increased rapidly around the world. Causing one of the world’s urgent problems, Plastic pollution. Now, what is plastic pollution? Plastic pollution is basically the build-up of unnecessary used up plastic objects and particles in the world such as plastic bottles, bags, and microbeads. Apparently, the world produces at least 3.5 million tons of plastic just in a single day. Hence the landfill sites are filled up often. Therefore, with the lack of human sympathy for the environment, we sometimes throw rubbish recklessly everywhere. Which causes problems of plastics floating around, and plastics could travel everywhere. Which will eventually lead their way into the ocean. Harming the lives of aquatic animals as well as land animals but also human lives as well.


            Plastic can harm animals. It could be as simple as accidentally consuming it and getting stuck to it. As a matter of fact, land or sea animals could get strangled over discarded six-pack rings which usually happens numerous times. In fact, one million seabirds and 100,000 aquatic animals were killed by six-pack rings yearly. Animals might also mistake the plastic or any kind of waste floating around the sea as their food. It’ll consume the object and as a consequence, it will get intoxicated and soon die. Unfortunately, did you know? Scientists have found that in at least 144 species, there are plastics hiding inside their bodies due to maybe accidental consumption. As a result, millions of individual animals died each year due to plastic pollution. But how does it affect us? In some way, those factors end up contaminating our own food. Moreover, some plastic particles are even found in our tap water. We could basically end up eating plastic affecting our health without even knowing it! That’s insane!  


             Plastics are indeed dangerous for everyone. But is it really all terrible? I don’t think so. In 1907, plastic was first invented by a Belgian chemist named Leo Baekeland. It was invented to benefit humans’ everyday lives. For instance, plastic revolutionizes medicine with life-saving appliances like life-jackets, life-buoys, etc. Moreover, It is also a convenient use for our daily lives. It could be as simple as having a plastic bag provided for you whenever you go to the supermarket to put in your groceries. Plastics are also cheap, hence most companies use plastics as packaging material. Speaking of plastic packaging, it is also hygienic. It protects humans from outside conditions like rain and as well as good protection against definite contaminations and disease. Besides, they also help preserve food so that it is still suitable to eat. In addition, it also has saved lives with helmets, car airbags, and equipment that helps filters for clean drinkable water sources. Not only that but also made space travel possible and moderated cars and jets. Furthermore, they do not give off methane in the worsening process. For instance, when organic materials end up in (places where garbage and trash are dumped), they usually give off big amounts of methane, which is harmful pollution. However, plastic doesn’t produce these substances. All of this proves that there are good benefits and advantages to plastics. But what are the downsides of it?


             As mentioned at the start, plastics affect animals' and humans' lives by accidental consumption and so on. Are there any other effects of plastic pollution done in the world? Sadly, yes. In some developing countries, they suffer from a flood of plastic wastes from all over the world that is caused by plastic which leads to all sorts of pollution. Plastic causes water pollution. Companies illegally dump their plastic wastes into a nearby river or lake which contaminates it and causes all sorts of environmental issues. Additionally, it causes air pollution. A bunch of plastic wastes has to be constantly burned down, as a result, sets off harmful gasses into the air. If harmful gasses are exposed to air, it can also damage our ozone layer. The ozone layer is basically the thing that protects the earth from getting too hot from the sun. If it’s damaged, it wouldn’t be able to protect us, and the temperature of the earth will increase and cause global warming. Which is already happening. Air pollution also increases the chances of getting the pulmonary disease. Moreover, plastic is a non-renewable source. In order to produce plastic, the main ingredients are oil and natural gas. We certainly know that oil isn’t renewable and it doesn’t last forever. That is why it is not a renewable resource, so we can’t forever use plastic. 


             However, there is still hope. Some people think that there is a potential of having eco-friendly plastics in the near future. Fortunately, high-tech devices being made might help scientists to discover alternative eco-friendly plastics. While that is still being progressed. Here are a couple of simple things you can do to help the world reduce plastic wastes and pollution. Although, the world nowadays is so dependent on plastic for their everyday lives. I believe we as individuals could make a change for the better. You could start helping the world today by simply doing one of these things as soon as possible. Separate yourself away from disposable plastic products. 90% of the items we use in our daily lives are only used once and they go straight onto the bin and they usually contain plastic. Examples are a plastic wrap, straws, coffee cup lids, grocery bags and etc. To avoid doing so, instead, bring your own fabric bag when going shopping for groceries. It could save your money from buying that plastic bag. 


Lastly, using the 3 R’s, recycle, reuse, reduced. It’s obvious that we needed to do these things. Even so, I don’t think we do a nice job of it. Most people don’t bother checking the labels of the bin before throwing away their rubbish. We need to look at the labels and make sure we don’t mistake the type of rubbish we put inside that specific bin. Like, make sure you put unnecessary and potential cardboards into the recycling bin, so it doesn’t go to waste when it can be recycled. Reuse things that can be reused. For instance, those plastic cups maybe. You can wash and dry them and they can be reused for another time again. Reduce the number of plastics you use. How? By simply being wiser of the products you buy at stores. 


That goes in the line of using your money wisely. Avoid spending your money on pointless things that could harm the surroundings. Choose a product that could be more helpful to the environment. Put pressure on manufacturers. Now, this might sound wrong but please don’t think of it as the other way. Although we could make a difference in our own habits. Manufacturers obviously have a bigger ecological footprint than us. If you believe that companies could be wiser at their use of materials that affect the environment, let your voice be heard. You could write them a letter about it or strike them where it really hurts. If you don’t have the guts to do that, you could instead, spend your money on a sustainable competitive advantage. 


To wrap this up,  just do the best you can as an individual to help with the situation. No matter how small it is you’ve done to help, it still counts and would make help a difference. Even so, don’t be discouraged. I believe that, if we work together as one helping this world’s issue, we can change the world for the better. Before it is too late. Remember, we, humans are the root of this problem however, we can also end this problem the way we started it. Take actions as soon as possible and have faith and hope. No matter how massive and terrible the problem is, there is still good in it. We may not completely put an end to it but I hoped we could balance the pros and cons out. 


Resources:

https://www.greenpeace.org/usa/key-facts-about-plastic-pollution/

https://environmental-conscience.com/plastic-pros-cons/

https://www.nationalgeographic.com/environment/habitats/plastic-pollution/#:~:text=Millions%20of%20animals%20are%20killed,species%20of%20seabird%20eats%20plastics.&text=Stomachs%20so%20packed%20with%20plastics,urge%20to%20eat%2C%20causing%20starvation.

https://www.sciencehistory.org/the-history-and-future-of-plastics#:~:text=In%201907%20Leo%20Baekeland%20invented,the%20rapidly%20electrifying%20United%20States.

https://www.youtube.com/watch?v=ODni_Bey154&t=212s


Tuesday, 3 November 2020

Heart Dissection - Science

In Science, we have been learning about the Circulatory system as well as the parts of it. As a part of our learning, we dissected a pig's heart. In order to get a deeper and more visual understanding of how the heart works. A pig's heart was a good option due to the fact that it is similar to the human's heart. 

Before we discuss how the dissecting went. Let's learn the functions of each Circulatory system parts work.

Arteries -  Arteries are a blood vessel that takes the blood away from the heart. 

Veins - The veins take the blood back to the heart.

AtriumThe Atrium is the upper chamber of the heart that receives blood.

Ventricle - The ventricle is a V - shapes cavities that push the blood into the arteries to take it away from the heart. 

Vena Cava The vena cava is a large vein carrying deoxygenated blood from the body to take to the heart. - Deoxygenated means that it does not carry oxygen. 

Aorta The aorta is the main artery that carries the blood away from the heart to the body.

Right Side of Heart - Deoxygenated blood enters the right atrium from a vein called Vena cava, the blood is then pumped to the right ventricle. The right ventricle then pumps it to the lungs to get oxygen 

Left Side of Heart - Like the right side of the heart blood enters the left atrium but this blood is oxygenated, which means it carries oxygen with it. Then the atrium pumps it to the left ventricle, after that the left ventricle pumps the blood to the body to deliver oxygen. 

Valves - Valves are gates that only go one way. They open up to let blood flow to the ventricle, it then closes so that blood doesn't flow back out. 

Heart Strings - The heartstrings are strong fibers that hold the valves in place.  

Personally, I think dissecting a heart was okay. I'm not really a fan of it but I don't hate it either. I think it's fascinating how we actually get to look at a real heart (not a human heart though, a pig's heart but it looks similar to it) visually to get a deeper understanding of the parts of the circulatory system. Cutting the heart in half satisfies me the most. 

Here are some photos I took during the dissection.

Monday, 19 October 2020

White Blood Cells POV - Writing (Late post)

Hello! Welcome to another post of mine. Weeks ago, In Hurumanu 2 (Science + Literacy) we were studying about blood. In one of our tasks, we were tasked to write a story about the blood cells. To expand an individual's understanding of blood and its functions. Here's my mini-story about the 4 types of blood cells through the White blood cell's point of view (POV). I hope you enjoyed it and have learned something new! 

 White Blood Cells POV (Point of view)

Hello. I am White blood cells. I have three other brothers and they are Red blood cells, Plasma, and Platelets. We are the four types of blood cells that are contained inside the human body. Each of us has different jobs that are responsible for. I and my brother Platelets are the defenders while my brother Plasma and red blood cells are responsible for transporting the chemicals that are needed for the body to survive. 

Together, we are the blood brothers.


Let me tell you, a bit more about me. My job is to protect the human body from any foreign molecules or infections that try to dare to enter the body. I am the bravest and fight any infections that come my way. I fought the infections by producing antibodies. Thus, the human body will stay healthy and safe. I usually rest when the body is perfectly healthy and a bit more active when it’s not well.


My brother, Platelets, kind of had a similar job as me. We both protect the body. Platelets are responsible for making blood clots when the body gets a wound or cut. That way, it would prevent the amount of blood loss from the body. Losing a lot of blood can lead to some serious conditions. Platelets are the tiny fragments of cells.


Next, my brother, red blood cells. He is responsible for carrying a chemical called “Hemoglobin”. A chemical that carries oxygen around the body. Without oxygen, humans wouldn’t be able to live. Red blood cells make up about 45% of the human body so there are more red blood cells.


Lastly, my brother Plasma. Plasma is rather a straw-colored liquid. He transports carbon dioxide from the human cells to their lungs, nutrients from the small intestine of their cells, and chemical messengers (called hormones) to their cells too. It makes up about 54% of the human body's blood.


Now there you have it. We are the blood brothers. Nice to meet you!

Now I have to go. I need to go and fight those nasty infections!


Wednesday, 14 October 2020

Muscles and Joints - Hurumanu 2 - Science

 Hi, this week in Hurumanu 2 [Science] subject, we began looking at the muscles and joints. Here are some key points I've learned during those sessions. 

1.What is the job of a muscle?

The job of the muscle is to make the bones of your skeleton or the tissue of your organs move.

2. Name the two muscles in your Upper Arm: 

The two muscles in your upper arm are Triceps and Biceps muscles.


3. If the gastrocnemius is contracting, what will the tibialis anterior be doing?

The tibialis anterior will be relaxing.


4. What do the following parts of a joint do?

  1. Cartilage - protects the two bones as they rub against each other.

  2. Synovial fluid - keeps the bones moving.

  3. Ligament - they attach the two bones together.


5. What are two examples in the human body of a:

  1. Hinge Joint: 1 knee  2.elbow

  2. Ball and Socket Joint: 1 shoulder 2.hips


If you are interested, you can watch the following videos.
Watch the video: Why do joints click?
Watch the video: What makes the muscle grow?