22-23 Sem 1 Science 7th Exam Review

If humans where to kill all the lions, what would happen to the populations of the creatures they eat?

• A. The prey they eat would increase in population.

• B. The prey they eat would decrease in population.

• C. The prey they eat would stay the same in population.

• D. A. The prey all be eaten by vultures instead.

What does tugor pressure do for a plant?

• A. It helps the plant reproduce.

• B. It causes the plant to turn toward light.

• C. It is water pressure in plant cells that help them stand up straight.

• D. It causes plants to grow in response to touch?

Which of the following organisms has to consume chemical energy from other organisms to live?

• A. Human

• B. Flower

• C. Tree

• D. Cactus

A flowered plant in a pot in your backyard is knocked over, which direction will its will flower now grow?

• A. Upward toward the light.

• B. Downward toward gravity.

• C. Sideways out of the pot it is in.

• D. Inward toward the dirt in the knocked over pot.

What is the definition physical change and chemical change?

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• Chemical Change- Matter changes form but not chemical identity.

  Physical Change- A chemical reaction forms new products(new substances/stuff).

• Chemical Change-A chemical reaction forms new products(new substances/stuff).

  Physical Change-Matter changes form but not chemical identity.

Which of the following would show a physical change has taken place?

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• Ice Melting into water.

• Your pizza you ate being digested in your stomach.

• The eggs, milk, flour, and sugar you baked into a cake.

There is a mining facility in your town, the water they use to mine is toxic from pollution, there is heavy rain and a flood, the mining water ends up flooding into the town's drinking water in the town's lake. What is the result?

• A. A clean aquifer

• B. Over Treated Drinking Water

• C. Cotaminated/Polluted/Toxic Drinking water

• D. Safe swimming water in the town's lake.

Which is an example of ecological succession?

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Mosses and Lichens are the first things to grow after an asteroid strike, what would they be called?

• A. Pioneer Species

• B. Secondary Species

• C. Primary Species

• D. Succession Species

• A. Vacuole

• B. Chlorophyll

• C. Nucleus

• D. Cell Membrane