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Why do all living things (plants and animals) need food?

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by

Erin Guillen

on 10 September 2014

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Transcript of Why do all living things (plants and animals) need food?

Why do all living things (plants and animals) need food?

Plants and Animals: Why they need food!
To live!
Without food, plants and animals would die.
Other reasons we need food:
1. To grow.
2. To be strong enough to reproduce.
3. Food enables plants and animals to survive.
4. Food gives plants and animals the ability to construct shelter which is a basic need of all plants and animals.
Think about what would happen if a rabbit, a herbivore, an animal that eats only plants, could not find any plants to eat.
The rabbit would eventually die because of the lack of energy it has in its body.
Animals like herbivores, need food in order to turn it into energy to keep their bodies alive and active.
Let's think about it!

Sustaining Life
*Living organisms use the energy that they take in from food and transfer it from one set of molecules to another which create chemical reactions that sustain energy.

*Plants gain their energy through a process called photosynthesis, which means that they obtain their energy from the sun.
Energy
Since energy cannot be created nor destroyed, the energy that is found in food is converted into different types of energy. This creates a cycle of energy that is very efficient and with the least amount of waste possible.
Sources
"A Framework for K-12 Science Education: Practices,
Crosscutting Concepts, and Core Ideas," by Committee on Conceptual Framework for the New K-12 Science Education
Standards; National Research Council, 2012.
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