[Q]: The items listed below were found in a science classroom. * a heart made of plastic with many of its parts labeled * clay formed to look like Earth and other planets * a giant plastic plant cell with removable cell parts These items are all examples of
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OPTIONS:
- models
- experiments
- variables
- controls
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[A]: models

[Q]: Evidence that living things have evolved over hundreds of millions of years can be found in
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OPTIONS:
- particles in the air
- rocks containing fossils
- tree rings from recently logged trees
- chemicals in human hair
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[A]: rocks containing fossils

[Q]: Several tomato plants are grown indoors next to a sunny window. The plants receive water and fertilizer and remain on the windowsill. What will most likely happen?
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OPTIONS:
- Most of the leaves on the window side will wilt and die.
- The roots of the plants will grow upward from the soil.
- Water droplets will collect on the leaves facing away from the window.
- The stem will bend toward the window.
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[A]:
The stem will bend toward the window.