Photosynthesis Summative Studyguide

On Saturday, J.R. and his friend, Don, made plant terrariums. By Monday, the plants had begun to wither. Mr. Patel, their science teacher, gave them a suggestion to find the ideal temperature for their plants to grow. Which suggestion would Mr. Patel have given them for the best results?

• Add different amounts of water to each terrarium.

• Plant different kinds of plants in each terrarium.

• Place different types of fertilizer in each terrarium.

• Use light bulbs with different brightness in each terrarium.

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The year after a hurricane knocked down many trees in Mrs. Whitfield's yard, she noticed that her lawn was much greener. What is the most likely reason for this?

• The trees were blocking the sunlight from reaching the grass.

• The trees' leaves were absorbing the rain so the grass got too little moisture.

• The trees created a habitat for insects that were damaging to the grass.

• The trees' leaves covered the grass when they fell in autumn.

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Water lilies do not grow in water that is more than 6 feet deep. What can be a reason for this?

• The water lily will get too much sunlight in deep water.

• The roots of the water lily will not be able to take in nutrients.

• The water lily will be eaten by big fish living in deep water.

• The leaves of the water lily will not reach the surface of the pond to receive sunlight.

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A student places a planter box near a window for several days and observes the growth of the plants. Which statement best explains why the plants are bending?

• The plants are dying in response to the soil.

• The plants are responding to sunlight.

• The plants are migrating due to lack of water.

• The plants are hibernating in response to heat.

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Examine the photograph of a tree with a vine growing up its trunk. How does growing up the tree trunk help the vine perform photosynthesis?

• The vine receives more water.

• The vine receives more sunlight.

• The vine absorbs less carbon dioxide.

• The vine absorbs less oxygen.

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Orchids grow in the rainforest, where tall trees block most of the sunlight. Many orchids have special roots that are green and grow above ground. How do the roots most likely help orchids survive in the shaded rainforest?

• The roots absorb water and oxygen from the air to make food.

• The roots perform photosynthesis when there is no light.

• The roots use heat from sunlight to give the leaves energy to make food.

• The roots and leaves both use sunlight to perform photosynthesis.

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Bacteria that live deep underwater on the ocean floor use chemicals as energy sources in a process called artificial photosynthesis. Which resource are the bacteria likely missing to perform photosynthesis?

• water

• oxygen

• light energy

• chemical energy

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A rainforest has a thick growth of tall trees with a large canopy, but the forest floor has very little plant growth. Which best explains why there is less growth of plants in the rainforest floor?

• The forest floor receives little sunlight.

• Insects eat up all the plants of the forest floor.

• Animals take shelter in the plants of the forest floor.

• The moisture present on the forest floor makes the young plants rot.

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In an experiment, one tomato plant is placed in the sun, and one is placed in the shade. Which plant will produce more tomatoes?

• The one in the shade because it will be protected from the heat.

• The one in the sun because more photosynthesis will occur.

• The one in the shade because fewer insects will bother it.

• The one in the sun because the sun will ripen the tomatoes faster.

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Certain bacteria live deep in the Pacific Ocean, where there is no sunlight. These bacteria live near underwater volcanoes, which create dim light and heat. How can the bacteria survive without sunlight?

• The dim light allows the bacteria to photosynthesize.

• The heat allows the bacteria to photosynthesize.

• The dim light allows the bacteria to create carbon dioxide.

• The heat allows the bacteria to create oxygen.