7th Grade Science Final Exam Review

The basic life functions of an organism are carried on by

• cells

• Enzymes

• Hormones

• Tissues

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Which ones are singled-celled organisms?

• Goldfish
• Seaweed
• Bacteria
• Ants 

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What are the building blocks of life?

• cells

• chloroplasts

• diatoms

• organisms

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The main function of the digestive system is to

• Break down food

• Produce hormones

• Store nutrients

• Eliminate waste

Competition is most likely to occur between which two organisms?

• grass and strawberry plants

• Trees and humans

• snakes and amphibians

• Birds and bears

When the environment changes more quickly than a species can adapt, the species may become

• extinct

• eaten

• Evolve

• Migrate

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Although the change in multicellular species usually takes thousands of years, some species of

bacteria undergo major changes in just a few years. One reason for this difference is that

• reproduce very quickly

• have a short life cycle

• have a large population size

• have a high mutation rate

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Which set of Earth components is arranged in order from solid to liquid to gas?

• lithosphere, hydrosphere, atmosphere

• lithosphere, atmosphere, hydrosphere

• hydrosphere, lithosphere, atmosphere

• atmosphere, lithosphere, hydrosphere

Which physical property is used to identify a mineral based on its resistance to being scratched?

• Hardness

• Transparency

• Color

• Luster

In which type of rock is the fossil imprint of a fern leaf most likely to be found?

• Sedimentary

• Metamorphic

• Igneous

• Volcanic

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