Lesson 4 of 9
Getting rid of waste
Show on a big screenA tulsi plant drops a dry, yellow leaf. Did something go wrong?
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Step 1 of 4
- A plant takes in water through its roots.
- It uses some to grow.
- It lets go of extra water and old leaves.
- Taking in and letting go happen again and again.
The rule
No, a plant lets go of old leaves it does not need.
Getting rid of waste means letting go of things not needed. It is one of the six signs.
- An animal breathes out used air. It sweats on a hot day.
- A plant drops old leaves. It lets out extra water.
Try the lab to finish this lesson.