Inspire Science Eco 2 Lesson 2: Cycles of Matter in Ecosytems

Water evaporates from the leaves of a plant and returns to the atmosphere in a process called ____________.

• respiration

• transpiration

All living things use energy and release gas as a waste product. What cycle explains the circulation of these gases?

• Water cycle

• Oxygen-Carbon cycle

• Nitrogen cycle

The ____________ cycle is a continuous circulation between the soil, organisms, and air.

Which part of the water cycle includes water vapor gas changing to a liquid?

• condensation

• evaporation

• precipitation

• transpiration

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How do animals get nitrogen that is stored in the soil?

• Animals do not take in the nitrogen stored in the soil.

• Bacteria change the nitrogen into a gas that the animals breathe.

• Plants absorb the nitrogen from the soil and animals can eat the plants.

• The animals can eat the soil and absorb the nitrogen through their digestive system.

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James is observing a lake. He wonders how the water in the lake is included in the water cycle. Place the stages of the water cycle in order, starting with the water in the lake.

• Water droplets combine in the clouds to form larger droplets.

• Energy from the sun causes the water in the lake to evaporate.

• Large water droplets fall to the ground from the clouds.

• Water vapor cools and condenses on dust particles forming clouds.

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Mr. Hernandez's science class learned that green plants use sunlight, water, and carbon dioxide to make their own food and release oxygen in the process. How can the class explain how animals complete the oxygen-carbon cycle?

• Animals take in the oxygen, but do not release gas as they use energy.

• Animals take in carbon dioxide and use it to make food.

• Animals take in oxygen and release nitrogen as waste.

• Animals take in oxygen and as they use energy, carbon dioxide is released as waste.

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Rain water that flows over Earth's surface is called ________. This water gathers in lakes and rivers.

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