1. By what process do plants create food? Respiration Chlorophyll Digestion Photosynthesis

2. What gas is a byproduct of the process that plants use to make food? Carbon dioxide Oxygen Ammonia Nitrogen

3. Plants need nitrogen in order to grow. Nitrogen in the air is not usable by plants. What is the most common process by which nitrogen is made available to plants? Bacterial action Photosynthesis Breakdown of water Lightning

4. What is an organism that breaks down dead organisms called? Decomposer Second consumer Producer First consumer

5. Ultimately, all of the energy in all life cycles on land originally came from the ... Answer: (One Word)

6. In what phase of the water cycle does rain fall? Evaporation Freezing Collection Precipitation

7. In the rock cycle, which kind of rocks are made from rocks that undergo heat and pressure? Igneous rocks Metamorphic rocks Minerals Sedimentary rocks

8. If a pesticide is released into the Arctic that accumulates in body cells, which of the following organisms is apt to have the highest pesticide levels? Seal Polar bear Algae Fish

9. Under the surface of the Earth, hot molten rock rises, cools, then sinks. This process is called... Diffusion Condensation Osmosis Convection

10. The state in which organisms maintain internal equilibrium is called... Osmosis Homegeneity Homeostasis Mitosis