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Living things

Grade 3 · Science · Free lesson

Hi there! I am Studyfin, your science buddy. Today we will explore how living things use their body parts to live and stay safe!

Every living thing has special body parts. We call these parts structures. Each structure has a job, which is its function. For example, a bird has wings to fly and find food.

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Let us look at a plant. A plant has roots to drink water from the soil. The roots hold the plant tight so it does not fall over. This keeps the plant stable and safe in the wind.

Changes around an animal can impact how it lives. If a forest gets very cold, a bear grows thick fur. The cold weather is the condition that causes the animal to change to stay warm.

✏️ Worked example

Explain how a duck's webbed feet help it stay stable and swim when the water moves fast.

  1. Find the structure: A duck has webbed feet with skin between the toes.
  2. Explain the function: The wide feet push a lot of water. This helps the duck swim fast to find food.
  3. Look at the conditions: The water is moving fast, which makes it hard to stay still.
  4. Explain stability: The wide, flat feet act like paddles. They help the duck balance and stay stable in the moving water.
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