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Read the article below carefully. Each student is assigned a question. Answer your question based on the article.

Student 1: Explain the process of why leaves fall off trees in autumn. 🍂

Student 2: What is the process of leaf detachment? 🌿

Student 3: How does the tree prepare for winter by shedding its leaves? ❄️

Student 4: What changes occur in the tree’s leaves before they fall? 🍁

Student 5: What are some reasons why trees "stop" producing chlorophyll in the autumn? 🌳

Each of you will create a new post underneath the Intructions in which you will publish the information required in the task. Each group will present the information to the other colleagues at the end of the class.

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Curious Kids is a series for children. If you have a question you'd like an expert to answer, send it to curiouskids@theconversation.edu.au You might also like the podcast Imagine This, a co-production between ABC KIDS listen and The Conversation, based on Curious Kids.

Why do leaves fall off trees? - Emma, age 5.

Great question! The short answer is that leaves fall off trees when they aren't doing their job any more.

A leaf's job is to turn sunlight into food for the tree. To do this, the leaf needs water. This water comes from the soil, and is sucked up through pipes in the trunk and branches all the way to the leaves - this can be a very long way for tall trees!

Flickr/Geoexplore, CC BY

If there isn't enough water, the leaf can be damaged and stop working. The tree doesn't want to waste all the good things in the leaf, so it takes the nutrients from the leaf back into the stems and roots. This way, they can be recycled.

When the leaf is empty, the tree stops holding onto it and it falls to the ground, or blows away in a gust of wind.

Read more: Curious Kids: how can a tiny seed actually grow into a huge tree?

What are deciduous trees?

Some trees lose their leaves every year. These trees are called deciduous trees, and they lose their leaves in response to the seasons. Deciduous trees mostly come from places where winter gets cold and snowy.

When it is very cold, the water in the tree can freeze - the leaves stop working and can even be damaged by the ice crystals. These trees know to prepare for this, and start taking nutrients out of the leaves when the days get shorter in autumn - this is when we can see them changing colour.

Flickr/Aine, CC BY

But there are deciduous trees in tropical places where it never gets cold. Winter in these places is very dry. When the rainy season ends, the tree knows that it will not have very much water for a few months, so it lets go of its leaves.

Trees hibernate too

When the tree is leafless, it can't make food. But it doesn't get hungry. Instead, it rests.

Just like a bear goes into hibernation and snoozes all through winter, trees have a long sleep until the water in the pipes starts moving again. This can be in spring, or when it starts to rain again. Then, they wake up and put out new leaves, so they can start making food again.

Some trees hold onto their leaves all year long. These trees are called evergreens, because they stay "ever green". But the leaves on these trees all die and fall off eventually. That happens when the leaves are old or damaged. Leaves don't work very well after they've been munched on by an animal.

Leaves are really important for the tree, but sometimes it's better for the tree to let them go. They can save all the good bits and when there is enough water, they can use them to grow brand new leaves.

Read more: Curious Kids: Where did trees come from?
Hello, curious kids! Have you got a question you'd like an expert to answer? Ask an adult to send your question to curiouskids@theconversation.edu.au

CC BY-ND

Please tell us your name, age and which city you live in. We won't be able to answer every question but we will do our best.

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Curious Kids: why do leaves fall off trees?

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Curious Kids is a series for children. If you have a question you'd like an expert to answer, send it to curiouskids@theconversation.edu.au You might also like the podcast Imagine This, a co-production between ABC KIDS listen and The Conversation, based on Curious Kids. Why do leaves fall off trees?

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Watch the video carefully, and then answer the questions below. Make sure to listen closely to what is said!

Student 1: What is snow? ❄️

Student 2: What are the freezing temperatures? Elaborate. 🌡️

Student 3: On what does the size and shape of each snowflake depend? ⛄

Student 4: For what do many people use snow for? 🏂

Student 5: How do animals that live in the polar regions protect themselves from the cold? 🐻‍❄️

Each of you will create a new post underneath the Instructions in which you will publish the information required in the task. Each group will present the information to the other colleagues at the end of the class.

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Read the article bellow – just the first two sections: the introduction and Happy New Year – and follow the instructions.

Student 1: Explain and describe the phenomenon of Equinox.☀️

Student 2: What authors/ poets wrote about this season? And what?📖

Student 3: What is the traditional meaning of spring?🌱

Student 4: What happens with people’s moods during spring?🌳

Student 5: How do other nations celebrate the coming of spring?🌸

Each of you will create a new post underneath the Instructions in which you will publish the information required in the task. Each group will present the information to the other colleagues at the end of the class.

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the most inspiring of the seasons (this year especially) - cnn

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Spring, the most inspiring of the seasons (this year especially)

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Spring is the season of inspiration. And of the hope that things will get better after they were worse.

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After watching the video attentively, each of you will have a task to complete. Follow the instructions and ask questions if needed!

Student 1: Explain and describe the phenomenon of Summer Solstice.🌻

Student 2: Describe the weather during Summer.🌡️

Student 3: How can you cool down during Summer? Describe the activities.🧊

Student 4: Explain the weather phenomenon that happens during Summer. Is there anything specific for this season?(tip: related to extreme weather)🌩️

Student 5: What about the animals and insects? Explain what happens with them during Summer.🐈

Each of you will create a new post underneath the Instructions in which you will publish the information required in the task. Each group will present the information to the other colleagues at the end of the class.

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Learn About Summer for Kids: Summer Solstice, seasons, weather for preschool and kindergarten