science 7th grade

Life science is

• a. the study of cells

• b. the study of living things

• c. the study of atoms

• d. all of the above.

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what are two characteristics of living things?

• All living thing are composed of one or more cells.

• There is a physical reason why most cells are so small.

• Organisms use energy to carry out the activities of life.

• The cells of all living things do not contain the molecule deoxyribonucleic(DNA)

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Parts of a cell

• Tissue

• Organelles

• Membrane

• organs

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what are the benefits of being multicellular?

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what are the steps of the scientific method?

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Tissues are

• a. a group of organs that work together to perform body functions

• b. anything that can carry out life processes independently

• c. a group of similar cells that perform a common function

• uthe arrangement of parts in an organism

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What is heredity?

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Examples of multicellular organism are

• Bacteria

• Plants

• Humans

• Amoebas

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Write down some examples of organ systems.

The steps of scientific methods

• are exactly the same in every investi gation.

• must always be used in the same order.

• always end with a conclusion.

• do not need to investigate

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