Big+Idea+3-4+Organisms

All living things are made of parts that have specific functions.

 * Parts of living things work together to carry out life functions.
 * Each plant or animal has different structures that serve different functions in growth, survival, and reproduction.
 * Most living things need food, water, light, air, and a way to dispose of wastes.
 * Energy is needed for all organisms to stay alive and grow.
 * Living things can be grouped based on their similarities and differences.
 * Tools make it possible to observe living things or the parts of living things that are too small to be seen with the naked eye.

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