# data[].attributes.body
Plants don't breathe the same way humans do. They exchange gases through holes or pores called stomata. These can usually be found in the underside of the plant's leaves.

# data[].attributes.headline
Zh 3L2021: Why can't penguins and ostriches fly even though they are birds?

# data[].attributes.subject
Zh 3L2021: Why can't penguins and ostriches fly even though they are birds?

# data[].attributes.body
Flightless birds evolved to adapt to their environment. Over time, they did not need to fly and eventually lost the ability.

All birds (so far) have feathers, but not all birds need to be able to fly to be considered a bird.

# data[].attributes.headline
Ra 3L2021: Are dinosaurs fish amphibians reptiles mammals birds or insects?

# data[].attributes.subject
Ra 3L2021: Are dinosaurs fish amphibians reptiles mammals birds or insects?

# data[].attributes.body
They are reptiles, though they have some differences between the reptiles we see today.

Reptiles today are cold-blooded while dinosaurs were believed to be warm blooded.

Birds are also thought to have evolved from some dinosaurs!

# data[].attributes.headline
Js 3L2021: What is the fastest thing on earth?

# data[].attributes.subject
Js 3L2021: What is the fastest thing on earth?

# data[].attributes.body
Light is the fastest thing in our universe so far. We have not found anything that travels faster than light, yet.

# data[].attributes.body
Bread is a rich source of food for mould. So, bread mould grows easily on bread.

# data[].attributes.headline
Tz 3L2021: Why do fungi love warm places?

# data[].attributes.subject
Tz 3L2021: Why do fungi love warm places?

# data[].attributes.body
Fungi like warm places because it helps their life processes to take place. It is similar to why our body temperature is warm (36 - 37oC), as we need a warm temperature for life processes to take place.

# data[].attributes.headline
Wr 3L202: What is the biggest bacteria found?

# data[].attributes.subject
Wr 3L202: What is the biggest bacteria found?

# data[].attributes.body
There is a bacteria called Thiomargarita namibiensis found in the ocean near Namibia. It is usually 0.1–0.3 mm in diameter, but sometimes can be 0.75 mm.

# data[].attributes.headline
Bn 3L2021: Where does mould and stuff come from?

# data[].attributes.subject
Bn 3L2021: Where does mould and stuff come from?

# data[].attributes.body
There are always Mould spores around in the air. The reason why they don't grow everywhere is because only some places have the right conditions for them to grow (dark, warmth, water, food).

# data[].attributes.headline
Ph 3L2021: What/where is the smallest bacteria in the whole world? 🌍🤔

# data[].attributes.subject
Ph 3L2021: What/where is the smallest bacteria in the whole world? 🌍🤔

# data[].attributes.body
Pelagibacter ubique is one of the smallest known free-living bacteria, with a length of 370 to 890 nm and an average cell diameter of 120 to 200 nm.

They are found in the sea and are very common.

# data[].attributes.headline
Xh 3L2021: How are fungi different from bacteria?

# data[].attributes.subject
Xh 3L2021: How are fungi different from bacteria?

# data[].attributes.body
The simple differences are:

1) Bacteria can only be seen using a microscope while fungi can be seen with the naked eye.
2) Fungi reproduce by spores while Bacteria do not reproduce by spores.

Read the following for more information:

The biggest difference is that fungi are usually multicellular (made up of many cells) while bacteria are unicellular (made of single cells). Fungi more complex living things compared to bacteria. There are many more differences between them, in how they reproduce, eat and live.

Bacteria do not have a cell nucleus while Fungi have a cell nucleus.

# data[].attributes.headline
Ni 3L2021: Why does wood float on water but metal does not. Wood absorbs water.

# data[].attributes.subject
Ni 3L2021: Why does wood float on water but metal does not. Wood absorbs water.

# data[].attributes.body
There are many factors that affect whether an object floats in water or not. One of these factors is density. The lower the density, the better that object is at floating.

Wood has a lot of air spaces inside it, so it has a very low density and can float.

You are right that wood absorbs water. After a VERY LONG time, wood will absorb water and sink. However, this takes so long that we don't really see it happen. Hence, we see that wood floats.

Metal has a much higher density so it sinks quickly.

# data[].attributes.headline
Wr 3L2021: Is glass a man-made material?

# data[].attributes.subject
Wr 3L2021: Is glass a man-made material?

# data[].attributes.body
Yes, check out how glass is made!

https://www.youtube.com/watch?v=UOwk2QIfDqY

# data[].attributes.headline
Ph 3L2021: How come wood is stronger than paper even though they are the same materials?

# data[].attributes.subject
Ph 3L2021: How come wood is stronger than paper even though they are the same materials?

# data[].attributes.body
Paper is made after 'breaking' many pieces of wood and 'joining' them together. Hence, paper is much weaker than the original wood from which it is made from.

Check out how paper is made: https://www.youtube.com/watch?v=jmgMdDH14sE

https://www.youtube.com/watch?v=DjfCpBKZCd4

# data[].attributes.headline
Ra 3L2021: Why do people say glass is strong but it easily breaks?

# data[].attributes.subject
Ra 3L2021: Why do people say glass is strong but it easily breaks?

# data[].attributes.body
When something is strong, it means that it usually needs a large amount of force to break it. Glass only easily breaks when it is thin. Glass is very strong when it is thicker. It will only break when a large force is applied (like something smashing through it or it falling on the floor).

Ceramic is also similar, it is considered to be strong.

Both glass and ceramic are brittle. Brittle means that they do not bend and will shatter break when a large force is applied. Some materials are strong but not brittle, like plastic. Plastic will usually bend instead of shattering.

# data[].attributes.headline
Ph 3L2021: What is a meteorite/asteroid made of?

# data[].attributes.subject
Ph 3L2021: What is a meteorite/asteroid made of?

# data[].attributes.body
Asteroids are usually made of different metals like Iron, Nickel and some non-metals like Silicon.

# data[].attributes.headline
Tz 3L2021: Why does a cockroach lays egg in a case?

# data[].attributes.subject
Tz 3L2021: Why does a cockroach lays egg in a case?

# data[].attributes.body
The case helps to protect the eggs inside it. Each case has around 40 eggs.

# data[].attributes.body
Most snakes reproduce by laying eggs, and some snakes give birth to live young!

# data[].attributes.headline
Is 3L2021: Why and how is the Maglev train created?

# data[].attributes.subject
Is 3L2021: Why and how is the Maglev train created?

# data[].attributes.body
https://www.youtube.com/watch?v=m-rNILcfTKM

# data[].attributes.headline
Sr 4R2021: After the rain, why is there an earthy smell?

# data[].attributes.subject
Sr 4R2021: After the rain, why is there an earthy smell?

# data[].attributes.body
The earthy smell that you can smell during and after rain is caused by chemicals released from the soil after they come into contact with rain water. It is known as petrichor.

https://www.youtube.com/watch?v=lGcE5x8s0B8

# data[].attributes.body
Feeling pain is our body's way of protecting ourselves. Fire will burn us. Hence, our skin senses the fire and sends the signals of pain to our brain so that our brain will tell us to get away from the fire and protect ourselves.

Likewise, other types of harms can be detected through pain so that we know that something is wrong and we make it right.

# data[].attributes.body
https://www.youtube.com/watch?v=I0dQx4SNSwE

# data[].attributes.headline
Ir 4R2021: Why does our gullet hurt after vomiting?

# data[].attributes.subject
Ir 4R2021: Why does our gullet hurt after vomiting?

# data[].attributes.body
When we vomit, some of the stuff inside of us comes out. This means that some of the things in our stomach comes out as vomit. Our stomach has a very strong acid (hydrochloric acid) to digest our food. This acid burns our gullet when we vomit.

# data[].attributes.headline
Cl 4R2021: We know that plants make their own food but what food do they make and eat.

# data[].attributes.subject
Cl 4R2021: We know that plants make their own food but what food do they make and eat.

# data[].attributes.body
The food that plants make is known as glucose, which is a type of sugar.

They use some of the food that they make to obtain energy for their life processes. Other animals also eat plants to obtain energy for their life processes.

https://www.youtube.com/watch?v=D1Ymc311XS8

# data[].attributes.attachment_link.title
Photosynthesis | The Dr. Binocs Show | Learn Videos For Kids

# data[].attributes.headline
In 4R2021: Why does the sky look red/orange/yellow when it is raining at night?

# data[].attributes.subject
In 4R2021: Why does the sky look red/orange/yellow when it is raining at night?

# data[].attributes.body
This is because what you are seeing is not the colour of the sky. It is the colour of the clouds. Before it rains, there are many tiny water droplets in the sky, which is what clouds are made out of.

You will notice that the clouds appear red/orange/yellow in cities or areas with a lot of lights. This is because the light from the street lights (which are usually orangish) shines into the sky as well. This reaches the clouds and is reflected back into our eyes. Hence, we see red/orange/yellow.

If you go far away from the city lights, a cloudy sky will appear much darker, as there would be less light coming from the ground.

# data[].attributes.headline
Ke 4R2021: Why are there the northern (and southern ) lights 🌌

# data[].attributes.subject
Ke 4R2021: Why are there the northern (and southern ) lights 🌌

# data[].attributes.body
The Earth's magnetic field blocks photons from the sun from bombarding the Earth, and they gather at the North and South poles and are seen as colourful lights (aurora borealis).

https://www.youtube.com/watch?v=czMh3BnHFHQ

# data[].attributes.headline
Si, 4R2021: Why are most sources of light warm?

# data[].attributes.subject
Si, 4R2021: Why are most sources of light warm?

# data[].attributes.body
Most sources of light energy also happen to emit heat energy. Hence, they are also warm.

# data[].attributes.headline
Ed, 4R2021: Why is it in cold places you can see the mist/carbon dioxide that people breathe out?

# data[].attributes.subject
Ed, 4R2021: Why is it in cold places you can see the mist/carbon dioxide that people breathe out?

# data[].attributes.body
Just to clarify, the 'smoke'/mist you see is NOT smoke or carbon dioxide. It is actually mist made out of tiny water droplets, like the white 'smoke' we see from a boiling kettle or the clouds in the sky.

Water vapour in our exhaled breath loses heat to the cold air in the surroundings (because it is a cold place) and condenses (changes from gas to liquid) into tiny water droplets.

Hence, we can see this mist.

https://www.youtube.com/watch?v=VJKwMT1uz-c

# data[].attributes.headline
Nt, 5L2021: What if there were no light on earth? I know the plants will die but how about humans?

# data[].attributes.subject
Nt, 5L2021: What if there were no light on earth? I know the plants will die but how about humans?

# data[].attributes.body
Humans depend on other living things in the food chain to survive. If plants die, the animals that eat the plants (which include humans) will start to die due to a lack of food. Some of these animals are animals like fish or cows. Since there would be fewer fish and cows, humans would eventually. start to die from a lack of food.

# data[].attributes.headline
Ra, 3L2021: Are dinosaurs fish amphibians reptiles mammals birds or insects?

# data[].attributes.subject
Ra, 3L2021: Are dinosaurs fish amphibians reptiles mammals birds or insects?

# data[].attributes.body
They are reptiles, though they have some differences between the reptiles we see today.

Reptiles today are cold-blooded while dinosaurs were believed to be warm blooded.

Birds are also thought to have evolved from some dinosaurs!

# data[].attributes.headline
Za, 3L2021: Why can't penguins and ostriches fly even though they are birds?

# data[].attributes.subject
Za, 3L2021: Why can't penguins and ostriches fly even though they are birds?

# data[].attributes.body
Flightless birds evolved to adapt to their environment. Over time, they did not need to fly and eventually lost the ability.

All birds (so far) have feathers, but not all birds need to be able to fly to be considered a bird.

# data[].attributes.headline
Ry, 3L2021: Why do some plants have flowers while others don't?

# data[].attributes.subject
Ry, 3L2021: Why do some plants have flowers while others don't?

# data[].attributes.body
Flowers help plants to reproduce. Non-flowering plants reproduce by other methods, like producing spores, so they do not need flowers.

# data[].attributes.headline
Da, 3L2021: Why fungi cannot make its own food?

# data[].attributes.subject
Da, 3L2021: Why fungi cannot make its own food?

# data[].attributes.body
A green pigment called chlorophyll is needed to make food. This green pigment is found in all plants, which is what makes them green.

Since fungi do not have chlorophyll, they cannot make their own food.

# data[].attributes.headline
Ar, 3L2021: What happens if I eat mouldy food? Will I die or survive?

# data[].attributes.subject
Ar, 3L2021: What happens if I eat mouldy food? Will I die or survive?

# data[].attributes.body
There isn't any guarantee what would happen. If your immune system is strong enough, it will be able to fight off the mould and you will be fine.

However, it is likely that you will suffer from some stomach pain, nausea, vomiting or diarrhoea. In the worst case, our digestive system might be poisoned and if our immune system is too weak, we might die. It is safer to not eat mouldy food.

# data[].attributes.headline
Bn, 3L2021: Is a sponge solid liquid or gas?

# data[].attributes.subject
Bn, 3L2021: Is a sponge solid liquid or gas?

# data[].attributes.body
A sponge is a solid, but it has pockets/spaces of air. Air is a gas.

# data[].attributes.headline
Em, 3L2021: Where does plastic come from?

# data[].attributes.subject
Em, 3L2021: Where does plastic come from?

# data[].attributes.body
Oil that is extracted from the earth is made into plastic. This is one reason why oil is so important to us.

https://www.youtube.com/watch?v=ggh0Ptk3VGE

# data[].attributes.headline
Ab, 4R2021: When there were no clocks last time, how could the people tell what time when just looking where the direction of the Sun is?

# data[].attributes.subject
Ab, 4R2021: When there were no clocks last time, how could the people tell what time when just looking where the direction of the Sun is?

# data[].attributes.body
The sun changes it's position depending on the time of the day. Hence, the direction of the shadow would change based on the time of the day.

https://www.youtube.com/watch?v=1SN1BOpLZAs

# data[].attributes.attachment_link.title
Following the Sun: Crash Course Kids #8.2

# data[].attributes.headline
Ka & Ke, 4R2021: Must we always have a screen to form a shadow?

# data[].attributes.subject
Ka & Ke, 4R2021: Must we always have a screen to form a shadow?

# data[].attributes.body
Ax, 4R2021: Yes, and the screen must be opaque so that light will not pass through. Then, we can see the areas where light has been blocked (dark) and the areas where light is not blocked (light) and a shadow would be formed.

# data[].attributes.headline
Ph, 3R2020: What is the difference between a virus and bacteria?

# data[].attributes.subject
Ph, 3R2020: What is the difference between a virus and bacteria?

# data[].attributes.body
https://www.youtube.com/watch?v=ldejTR04iKg

# data[].attributes.attachment_link.title
Virus vs Bacteria, What's Actually the Difference?

# data[].attributes.headline
Ar, 4L2020: Do we gain heat when we are sweating?

# data[].attributes.subject
Ar, 4L2020: Do we gain heat when we are sweating?

# data[].attributes.body
It's actually the opposite. We sweat when we gain heat. Sweat actually helps us to remove heat. It cools us down. Here's what happens:

Body heats up --> Brain realises that body is hot --> Brain sends signal to sweat glands --> Sweat (liquid) is created --> Sweat (liquid) gains heat from the body and evaporates --> Body is cooled down

# data[].attributes.headline
Cl, 4L2020: What will happen if you don't sweat?

# data[].attributes.subject
Cl, 4L2020: What will happen if you don't sweat?

# data[].attributes.body
Sweat has 2 main functions:

1) Remove heat - Sweat is water. The water gains heat from our body and evaporates and becomes water vapour. Hence, heat is removed and our body cools down.

2) Remove waste materials - This is why our sweat tastes salty.

If we don't sweat, our bodies will overheat and we will cook. Also, we will be poisoned from excess waste materials.

# data[].attributes.headline
Sy, 4L2020: Is it really true that the core of the earth is hotter than the sun?

# data[].attributes.subject
Sy, 4L2020: Is it really true that the core of the earth is hotter than the sun?

# data[].attributes.body
The earth's core is hotter than SURFACE of the sun. The sun's core is still hotter than the earth's core.

https://www.youtube.com/watch?v=0MSoJATlTrQ

# data[].attributes.attachment_link.title
Why the Earth's Core Is Hotter Than the Sun

# data[].attributes.body
Lightning is an electric current. Within a thundercloud way up in the sky, many small bits of ice (frozen raindrops) bump into each other as they move around in the air. All of those collisions create electric charges that accumulate. When the current gets too high, they are released in the form of lighning.

https://www.youtube.com/watch?v=fEiVi9TB_RQ

# data[].attributes.attachment_link.title
What Causes Thunder and Lightning? | Weather Science | SciShow Kids

# data[].attributes.headline
Ja, 4L2020: is it true that because lightning comes before thunder, that proves that sound is slower then lightning?

# data[].attributes.subject
Ja, 4L2020: is it true that because lightning comes before thunder, that proves that sound is slower then lightning?

# data[].attributes.body
Yes, light travels faster than sound. Light travels at 300,000,000 metres per second, while sounds travels at around 300 metres per second.

https://www.youtube.com/watch?v=IBoTyCv9zEU

# data[].attributes.attachment_link.title
Why We See Lightning Before We Hear Thunder // Severe Weather Series

# data[].attributes.headline
Ay, 4L2020: Why can we see stars at night but not day?

# data[].attributes.subject
Ay, 4L2020: Why can we see stars at night but not day?

# data[].attributes.body
During the day, the light from the sun is much brighter than the light from the stars. Therefore, we cannot see the stars as the sun outshines all the other stars (from where we are).

# data[].attributes.headline
Hy, 4L2020: What state of matter is steam?

# data[].attributes.subject
Hy, 4L2020: What state of matter is steam?

# data[].attributes.body
Steam is hot water vapour, which is a gas. We cannot see steam or water vapour.

https://www.youtube.com/watch?v=PF2vH3R-fTc&t=188s

# data[].attributes.attachment_link.title
What is the difference between water vapour and steam? (Science, Upper Block, Cycles: Water Cycle)

# data[].attributes.headline
Sd, 4L2020: What state of matter is a rainbow?

# data[].attributes.subject
Sd, 4L2020: What state of matter is a rainbow?

# data[].attributes.body
A rainbow is not matter as it does not have mass and occupy space. It is light energy (a result of white light being split into its various components).

# data[].attributes.headline
Na, 4L2020: What state of matter is lava?

# data[].attributes.subject
Na, 4L2020: What state of matter is lava?

# data[].attributes.body
Lava is molten or liquid rock. When lava cools down, it becomes solid rock.

# data[].attributes.headline
Am, 4L2020: Is earth a solid , liquid or gas?

# data[].attributes.subject
Am, 4L2020: Is earth a solid , liquid or gas?

# data[].attributes.body
The earth is made up of all 3. Our oceans and water bodies are made up of liquid, land and ice are solid, and our atmosphere is gas.

# data[].attributes.body
https://www.youtube.com/watch?v=l3qpcbMV_fM

# data[].attributes.headline
Th, 4L2020: Do we need a certain amount of blood to survive?

# data[].attributes.subject
Th, 4L2020: Do we need a certain amount of blood to survive?

# data[].attributes.body
People can die from losing half to two-thirds of their blood. The average adult has about 4 to 6 liters of blood in their body.

# data[].attributes.headline
Ln, 4L2020: Why is the heart at the left side instead of the middle?

# data[].attributes.subject
Ln, 4L2020: Why is the heart at the left side instead of the middle?

# data[].attributes.body
This is because the heart's bottom-left chamber is responsible for pumping oxygenated blood around the whole body, so it needs to be stronger and larger than the right ventricle, which only pumps blood to the lungs. It's this left ventricle that you can feel beating in your chest.

# data[].attributes.body
The kidneys remove wastes and extra fluid and acid that is produced by the cells of the body and maintain a healthy balance of water, salts, and minerals.

# data[].attributes.headline
Ch, 4L2020: Can red blood cells reproduce?

# data[].attributes.subject
Ch, 4L2020: Can red blood cells reproduce?

# data[].attributes.body
Red blood cells are considered cells, but they lack a nucleus, DNA, and organelles (like the endoplasmic reticulum or mitochondria). Red blood cells cannot divide or replicate like other bodily cells.

# data[].attributes.body
Bones are made up of a framework of a protein called collagen, with a mineral called calcium phosphate that makes the framework hard and strong.

# data[].attributes.body
The iron in our blood gives the red colour. This is similar to the reddish brown colour that we see in the rusting of iron metal.

https://www.youtube.com/watch?v=FDrGhy72-gk

# data[].attributes.attachment_link.title
Why is blood red in color? | #aumsum #kids #science #education #children

# data[].attributes.headline
Rg, 4L2020: how long are our intestines?

# data[].attributes.subject
Rg, 4L2020: how long are our intestines?

# data[].attributes.body
Our small intestine is around 22 metres and large intestine is around 1.5 metres.

# data[].attributes.headline
Cl, 4R2021: Where does the light of the sun come from?

# data[].attributes.subject
Cl, 4R2021: Where does the light of the sun come from?

# data[].attributes.body
Energy (both Light and Heat Energy) is released from nuclear fusion reactions happening in the sun.

https://www.youtube.com/watch?v=6FB0rDsR_rc

# data[].attributes.attachment_link.title
Here Comes the Sun: Crash Course Kids #5.1

# data[].attributes.body
The reflective side of the mirror does not have a colour. What you see are the colours of the object whose light is reflected off the mirror.

https://www.youtube.com/watch?v=3tDrCUYSiD0

# data[].attributes.attachment_link.title
What is the Color of a Mirror? | #aumsum

# data[].attributes.body
Yes. Apart from stars, planets, moons, comets, asteroids and other observable things in space, there are very small bits of matter in space.

https://www.youtube.com/watch?v=vwBdI3R_voE

# data[].attributes.headline
Lu & Za, 3R2020: Which is the strongest material? Metal, wood, plastic or glass?

# data[].attributes.subject
Lu & Za, 3R2020: Which is the strongest material? Metal, wood, plastic or glass?

# data[].attributes.body
Is a plastic bag weaker than a glass window? I can tear a plastic bag but I can't tear a glass window. However, if I drop a plastic bag, it will not break. If I drop a glass window, it will break.

It depends on the type of metal/wood/plastic/glass. Different materials can be stronger based on their uses in objects. A wooden ruler can break more easily than a wooden bench. Strength depends on the size and type of material of an object.

# data[].attributes.body
https://www.youtube.com/watch?v=MjKXS3aqO6o

# data[].attributes.attachment_link.title
PAPER: Who invented it? | Google Arts & Culture

# data[].attributes.headline
El, 3R2020: Is the tomato a fruit or a vegetable?

# data[].attributes.subject
El, 3R2020: Is the tomato a fruit or a vegetable?

# data[].attributes.body
https://www.britannica.com/story/is-a-tomato-a-fruit-or-a-vegetable#:~:text=Tomatoes%20are%20fruits%20that%20are,flower%20ovary%20and%20contains%20seeds.

# data[].attributes.attachment_link.readable_text
© Saidin Jusoh/Fotolia

The age-old question actually has an answer-it's both! Tomatoes are fruits that are considered vegetables by nutritionists. Botanically, a fruit is a ripened flower ovary and contains seeds. Tomatoes, plums, zucchinis, and melons are all edible fruits, but things like maple "helicopters" and floating dandelion puffs are fruits too. For some reason, people got hung up on tomatoes, but the "fruit or vegetable" question could also work for any vegetable with seeds.

Now, nutritionally, the term "fruit" is used to describe sweet and fleshy botanical fruits, and "vegetable" is used to indicate a wide variety of plant parts that are not so high in fructose. In many cultures, vegetables tend to be served as part of the main dish or side, whereas sweet fruits are typically snacks or desserts. Thus, roots, tubers, stems, flower buds, leaves, and certain botanical fruits, including green beans, pumpkins, and of course tomatoes, are all considered vegetables by nutritionists. There is no hard-and-fast rule that clearly designates a botanical fruit as a vegetable, but, given that tomatoes are generally not used in desserts and are closely related to other fruit-vegetables (e.g., eggplants and peppers), it is not too counterintuitive for tomatoes to be classified as vegetables.

Uncover how tomatoes are both a fruit and a vegetable

Encyclopædia Britannica, Inc.

So go ahead and call a tomato whatever you want-it's super tasty either way.

# data[].attributes.attachment_link.description
The age-old question actually has an answer-it's both! Tomatoes are fruits that are considered vegetables by nutritionists. Botanically, a fruit is a ripened flower ovary and contains seeds. Tomatoes, plums, zucchinis, and melons are all edible fruits, but things like maple "helicopters" and floating dandelion puffs are fruits too.

# data[].attributes.headline
Jo, 3R2021: Does any animal have 5 legs?

# data[].attributes.subject
Jo, 3R2021: Does any animal have 5 legs?

# data[].attributes.body
I can think of the starfish and the kangaroo. However, a starfish's 'legs' aren't really legs, and they have mini 'legs' on their 5 'legs'. For the kangaroo, its tail functions very closely to a leg.

Kangaroo: https://www.newscientist.com/article/dn25829-zoologger-meet-the-only-animal-with-five-legs/#:~:text=It%20turns%20out%20kangaroos%20may,leg%E2%80%9D%20is%20the%20animal's%20tail

Starfish: https://www.youtube.com/watch?v=Lbg-tQ6FJgQ

# data[].attributes.headline
Le, 3R2021: What existed first on Earth,the chicken egg or the chicken?

# data[].attributes.subject
Le, 3R2021: What existed first on Earth,the chicken egg or the chicken?

# data[].attributes.body
2 birds that weren't really chickens created the first chicken egg. The egg came first.

https://www.youtube.com/watch?v=1a8pI65emDE&feature=emb_logo

# data[].attributes.attachment_link.title
Which Came First - The Chicken or the Egg?

# data[].attributes.headline
Lu,  3R2020: Why do magnetic materials only attract and not repel?

# data[].attributes.subject
Lu,  3R2020: Why do magnetic materials only attract and not repel?

# data[].attributes.body
Magnetic materials do not have any poles. Hence, they cannot repel as only like poles can repel when facing each other.

# data[].attributes.body
It can create a shadow ONLY if there is another brighter light source (like the sun).

https://www.youtube.com/watch?v=g3zMsN5WMxM

# data[].attributes.headline
Jl, 4R2021: Why do shadows become blurry as they get bigger?

# data[].attributes.subject
Jl, 4R2021: Why do shadows become blurry as they get bigger?

# data[].attributes.body
The light from the light source is not coming from only one point. There are many points where light is coming from, so there many points where light is blocked to different extents, so the shadow becomes darker and darker until light is completely blocked behind the object.

# data[].attributes.body
Most gases are colourless and hardly block and light from passing through. This is why we cannot see the gas.

Some gases have colours and allow less light to pass through. By blocking some light, these gases can cast shadows, although they are very faint.

# data[].attributes.headline
Ab, 4R2021: Are clouds matter? If they are, what state are they in?

# data[].attributes.subject
Ab, 4R2021: Are clouds matter? If they are, what state are they in?

# data[].attributes.body
Clouds are made of tiny water droplets, so it is liquid.

https://www.youtube.com/watch?v=DigBbR3FeP8

# data[].attributes.headline
Lw, 4R2021: Why are the stems of plants green if they do not photosynthesize?

# data[].attributes.subject
Lw, 4R2021: Why are the stems of plants green if they do not photosynthesize?

# data[].attributes.body
Actually, the stems also contain some chlorophyl, which is why they are green, which means that they do photosynthesise! However, the amount of food they produce is MUCH MUCH less than the amount of food produced by the leaves. For the P4 Science Syllabus, we focus on the MAIN FUNCTION of each part of the plant, and the stem's main function is to hold the plant upright and to transport food, water and mineral salts.