How Do Plants Produce Food? Photosynthesis Practice Test
Practice test created to study for content of Harcourt grade 5, chapter 5, lesson 1 science book.
Questions and Answers
- 1.
Which of the following best describe the jobs roots do?
- A.
Support plants and allow leaves to reach sunlight
- B.
Anchor plants and take in water and nutrients
- C.
Make food for the plant and take in air
- D.
Absord light energy and make sugar and oxygen
Correct Answer
B. Anchor plants and take in water and nutrientsExplanation
The roots of a plant anchor it to the ground, providing stability and support. They also absorb water and nutrients from the soil, which are essential for the plant's growth and survival. Therefore, the statement "Anchor plants and take in water and nutrients" best describes the function of plant roots.Rate this question:
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- 2.
Which of the following is NOT a job done by stems?
- A.
Support the plant
- B.
Enable leaves to reach sunlight
- C.
Carry water and nutrients to the leaves
- D.
Make food for the plant
Correct Answer
D. Make food for the plantExplanation
Stems do not make food for the plant. This is the job of the leaves, which contain chlorophyll and undergo photosynthesis to produce food for the plant. Stems support the plant, allowing it to stand upright and provide a framework for the leaves to reach sunlight. Stems also transport water and nutrients from the roots to the leaves through the xylem and phloem tissues. However, they do not play a direct role in making food for the plant.Rate this question:
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- 3.
What is the main job of plant leaves?
- A.
Make food for the plant
- B.
Keep the plant from drying out
- C.
Carry water and nutrients from soil
- D.
Cool the plant
Correct Answer
A. Make food for the plantExplanation
Plant leaves have a vital role in photosynthesis, a process by which plants convert sunlight, carbon dioxide, and water into glucose and oxygen. Glucose serves as the plant's food source, providing energy for growth and development. Therefore, the main job of plant leaves is to make food for the plant.Rate this question:
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- 4.
The small openings in the underside of a leaf are called _____________________.
- A.
Epidermis
- B.
Xylem
- C.
Stomata
- D.
Phloem
Correct Answer
C. StomataExplanation
Stomata are the small openings in the underside of a leaf that allow for gas exchange. They regulate the intake of carbon dioxide for photosynthesis and the release of oxygen and water vapor. The epidermis is the outermost layer of the leaf, while xylem and phloem are vascular tissues responsible for transporting water, nutrients, and sugars within the plant. Therefore, stomata is the correct answer as it specifically refers to the small openings on the leaf's surface.Rate this question:
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- 5.
The loss of water through plant leaves is __________________________.
- A.
Transpiration
- B.
Photosynthesis
- C.
Chlorophyll
- D.
Epidermis
Correct Answer
A. TranspirationExplanation
Transpiration is the process by which water is lost from plant leaves through small pores called stomata. It occurs as a result of the evaporation of water from the leaf surface. Transpiration plays a crucial role in the transport of water and nutrients from the roots to the rest of the plant. It also helps in cooling the plant and maintaining its shape and structure. Therefore, transpiration is the correct answer as it accurately describes the loss of water through plant leaves.Rate this question:
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- 6.
The outter layer of cells on a leaf is the _______________________.
- A.
Stomata
- B.
Epidermis
- C.
Stem
- D.
Chloroplast
Correct Answer
B. EpidermisExplanation
The outer layer of cells on a leaf is called the epidermis. The epidermis is a protective layer that covers the entire surface of the leaf, acting as a barrier against physical damage, pathogens, and excessive water loss. It is made up of tightly packed cells that are typically transparent, allowing sunlight to pass through to the underlying cells. The epidermis also contains specialized structures called stomata, which are responsible for gas exchange and regulating the movement of water vapor and gases in and out of the leaf.Rate this question:
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- 7.
The process by which plants make food is ___________________________.
- A.
Transpiration
- B.
Growing
- C.
Photosynthesis
- D.
Respiration
Correct Answer
C. PhotosynthesisExplanation
Photosynthesis is the correct answer because it is the process by which plants use sunlight, carbon dioxide, and water to produce glucose (food) and release oxygen. This process occurs in the chloroplasts of plant cells and is essential for the plant's survival. Transpiration is the process of water movement through a plant, growing refers to the increase in size or development of a plant, and respiration is the process of releasing energy from glucose.Rate this question:
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- 8.
Three things needed by plants for the production of food are:
- A.
Water, oxygen, and sunlight
- B.
Water, carbon dioxide, and fertilizer
- C.
Water, oxygen, and sugar
- D.
Water, carbon dioxide, and sunlight
Correct Answer
D. Water, carbon dioxide, and sunlightExplanation
Plants require water, carbon dioxide, and sunlight for the production of food. Water is essential for the process of photosynthesis, where plants convert sunlight into energy. Carbon dioxide is also needed for photosynthesis, as it is used to produce glucose, which is the primary source of energy for plants. Sunlight provides the energy required for photosynthesis to occur. Oxygen is produced as a byproduct of photosynthesis, but it is not necessary for the production of food in plants.Rate this question:
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- 9.
The green pigment in chloroplasts that enable a plant to absorb light energy to make food is _______________________.
- A.
Carbon dioxide
- B.
Chlorophyll
- C.
Chloroplast
- D.
Color
Correct Answer
B. ChlorophyllExplanation
Chlorophyll is the correct answer because it is the green pigment found in chloroplasts that enables plants to absorb light energy for photosynthesis. It plays a crucial role in capturing sunlight and converting it into chemical energy, which is used to produce food for the plant.Rate this question:
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- 10.
Plants take in ________________________ from the air.
- A.
Carbon dioxide
- B.
Chlorophyll
- C.
Oxygen
- D.
Energy
Correct Answer
A. Carbon dioxideExplanation
Plants take in carbon dioxide from the air as part of the process of photosynthesis. During photosynthesis, plants use the energy from sunlight, along with water and carbon dioxide, to produce glucose (a type of sugar) and oxygen. The carbon dioxide is absorbed through tiny openings in the leaves called stomata, and then it is converted into glucose with the help of chlorophyll, a pigment found in plant cells. Oxygen is released as a byproduct of this process. Therefore, carbon dioxide is an essential component for plants to carry out photosynthesis and produce food.Rate this question:
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- 11.
_________________________ is released by plants as a byproduct of photosynthesis.
- A.
Energy
- B.
Carbon dioxide
- C.
Oxygen
- D.
Chlorophyll
Correct Answer
C. OxygenExplanation
Plants release oxygen as a byproduct of photosynthesis. During photosynthesis, plants use sunlight, water, and carbon dioxide to produce glucose (energy) and oxygen. The oxygen is released into the atmosphere as waste. This process is crucial for the survival of not only plants but also other organisms, as oxygen is necessary for respiration. Therefore, the correct answer is oxygen.Rate this question:
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- 12.
Plants are called ___________________________ because they make their own food.
- A.
Photosynthesis
- B.
Consumers
- C.
Producers
- D.
Chlorophyll
Correct Answer
C. ProducersExplanation
Plants are called "producers" because they have the ability to produce their own food through the process of photosynthesis. They use sunlight, water, and carbon dioxide to synthesize glucose and release oxygen as a byproduct. This ability to create their own food distinguishes plants from consumers, which rely on consuming other organisms for energy. Chlorophyll, on the other hand, is the pigment responsible for capturing sunlight during photosynthesis but does not define plants as producers.Rate this question:
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- 13.
Animals that eat other plants or animals are called _______________________.
- A.
Photosynthesis
- B.
Producers
- C.
Carnivores
- D.
Consumers
Correct Answer
D. ConsumersExplanation
Consumers are animals that obtain energy by consuming other plants or animals. They are unable to produce their own food through processes like photosynthesis, which is the conversion of sunlight into energy. Producers, on the other hand, are organisms that can produce their own food through photosynthesis. Carnivores, specifically, are consumers that primarily eat other animals. Therefore, the correct answer to the question is "consumers."Rate this question:
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