Level 2

Alaska Science
Key Element

A student who meets the content standard should understand that living things are made up mostly of cells and that all life processes occur in cells (Cells).


blue rule

Performance Standard Level 2, Ages 8–10

Students recognize the basic requirements for all living things: food, water, waste disposal and reproduction.

Standards Cross-Reference blue rule

Standards Cross-References
( Alaska Department of Education & Early Development Standards

National Science Education Standards

All organisms are composed of cells–the fundamental unit of life. Most organisms are single cells; other organisms, including humans, are multicellular. (Page 156)

Cells carry on the many functions needed to sustain life. They grow and divide, thereby producing more cells. This requires that they take in nutrients, which they use to provide energy for the work that cells do and to make the materials that a cell or an organism needs. (Page 156)



Some living things consist of a single cell. Like familiar organisms, they need food, water, and air; a way to dispose of waste; and an environment they can live in. (Page 111)

Microscopes make it possible to see that living things are made mostly of cells. Some organisms are made of a collection of similar cells that benefit from cooperating. Some organisms’ cells vary greatly in appearance and perform very different roles in the organism. (Page 111)

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