Science Benchmark Review

How does photosynthesis contribute to the oxygen content in the atmosphere?

• By consuming oxygen and releasing carbon dioxide.

• By breaking down animal wastes into simpler substances.

• By converting sunlight into chemical energy, releasing oxygen as a byproduct.

• By absorbing oxygen to produce carbon dioxide for plant respiration.

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In a forest ecosystem, how do animals obtain their energy?

• Animals in the forest can produce their own food through photosynthesis.

• Forest animals depend on plants and other animals for their energy source.

• Forest animals do not need plants or other animals for energy.

• Forest animals store energy from sunlight directly.

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In a home garden, what do plants use along with carbon dioxide to produce their own food?

• Oxygen

• Nitrogen

• Water

• Minerals

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Which gas is absorbed by plants during the process of photosynthesis?

• Oxygen

• Carbon dioxide

• Nitrogen

• Hydrogen

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How does photosynthesis contribute to the carbon cycle in an ecosystem?

• By releasing carbon dioxide into the atmosphere during the process.

• By converting carbon dioxide into oxygen, thus reducing greenhouse gases.

• By using carbon dioxide to produce glucose, which organisms use for energy.

• By absorbing carbon dioxide and releasing it unchanged back into the ecosystem.

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Which TWO of the following are consequences of the giraffe consuming leaves from the acacia tree?

• The giraffe gains nutrients essential for its survival.

• The giraffe contributes to the pollination of the acacia tree.

• The acacia tree receives essential minerals from the giraffe.

• The giraffe obtains energy through the digestion of the leaves.

• The acacia tree grows taller as a defense mechanism against giraffes.

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What role do producers play in the food chain that contributes to the ingredients of a pizza?

• They consume the pizza leftovers, recycling energy back into the ecosystem.

• Producers, such as wheat and tomatoes, provide the base ingredients for the dough and sauce.

• They are responsible for creating the metal used in pizza ovens.

• Producers are the primary source of cheese through direct cultivation.

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What is a producer in science?

• A type of consumer in an ecosystem.
• An organism that can make its own food through photosynthesis or chemosynthesis.
• An organism that feeds on other organisms for energy.
• A term used to describe a type of chemical reaction.

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A ​ (a)   eats other organisms for its energy

• Consumer
• Producer
• Decomposer

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Match the following

• Carnivore

• I only eat dead things

• Decomposer

• I eat only plants

• Omnivore

• I eat plants and animals

• Herbivore

• I only eat other animals

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