Photosynthesis and the Food Web

Plants use ______ to make their own food.

• water

• sunlight

• soil

• air

Animals depend on ______ for energy.

• sunlight

• water

• soil

• air

Which of the following is released by plants during photosynthesis?

• Oxygen

• Carbon Dioxide

• Nitrogen

• Hydrogen

Which statement BEST describes the role of photosynthesis in an ecosystem?

• A. Photosynthesis is the final product of matter and energy for all organisms.

• B. Photosynthesis cycles energy among organisms, but organisms are responsible for cycling matter.

• C. Photosynthesis cycles matter among organisms, but organisms are responsible for cycling energy.

• D. Photosynthesis is the starting point of matter and energy for all organisms.

How does photosynthesis support the fox?

• A. The fox eats photosynthetic plants to obtain food, oxygen, and water.

• B. The fox obtains energy from sunlight that it uses to catch and eat the hare.

• C. The fox converts energy received from sunlight into sugar, oxygen, and water.

• D. The fox receives energy from eating the hare that obtained energy from eating plants.

The pictures show close-up views of a fir tree and a cactus. Both trees have adapted to their environments. The fir tree stores water in its needles so that it can survive winter, when most available water is frozen. The cactus stores water in its stem so that it can survive seasonal droughts, when little water is available. In which biomes can the fir tree and the cactus most likely be found?

• The fir tree can be found in the rain forest biome, and the cactus can be found in the taiga biome.

• The fir tree can be found in the tundra biome, and the cactus can be found in the rain forest biome.

• The fir tree can be found in the coniferous forest biome, and the cactus can be found in the desert biome.

• The fir tree can be found in the grassland biome, and the cactus can be found in the coniferous forest biome.

Pick two reasons that a plant from a rain forest biome would not survive in a desert biome. Pick up to 5 answers.

• There is not enough water in a desert biome.

• There is not enough sunlight in a desert biome.

• There are not enough nutrients in the soil in a desert biome.

• The soil contains too much organic matter in a desert biome.

• The available growing space is too crowded in a desert biome.

What happens to light energy from the Sun when it reaches the surface of Earth?

• The light energy is multiplied when it reaches the plants on Earth.

• The light energy is destroyed when plants are eaten by herbivores.

• The light energy is transformed to chemical energy by photosynthesis.

• The light energy is converted to potential energy by cellular respiration.

The two most important factors that determine what type of biome develops are the climate and

• continent

• weather

• the soil type

• the latitude

All plants and animals need to obtain energy from their environment in order to grow. How is this process different for plants than it is for animals?

• Plants obtain their energy from sunlight, while animals obtain their energy by eating plants or other animals.

• Plants need several multiple sources of energy, while animals only need one source of energy.

• Plants convert the energy they obtain to sugar, while animals convert the energy they obtain to salt.

• Plants obtain their energy through their roots, while animals obtain their energy through their mouths.