Photosynthesis Quiz for Grade 5

Quiz · Grade 5 · Science

Shared by Trishna · Free to use as a template on AssessmentWiz.

Questions

• Q1. Which of the following best describes what happens during photosynthesis?

  • Plants break down sugar to release energy for growth
  • Plants use sunlight, water, and carbon dioxide to make their own food
  • Plants absorb oxygen from the air to produce glucose
  • Plants release carbon dioxide and absorb glucose from the soil

  Answer: Plants use sunlight, water, and carbon dioxide to make their own food

  Explanation: Photosynthesis is the process where plants capture sunlight energy and use it to convert water and carbon dioxide into glucose (food) and oxygen.

• Q2. During photosynthesis, plants take in carbon dioxide and release _____ as a byproduct.

  Answer: oxygen

  Explanation: Oxygen is produced as a byproduct when plants split water molecules during photosynthesis, and it is released into the air through tiny pores called stomata.

• Q3. Why do plants appear green to our eyes?

  • Because chlorophyll absorbs green light and reflects all other colors
  • Because chlorophyll absorbs red and blue light and reflects green light
  • Because leaves produce green pigment as a waste product of photosynthesis
  • Because water inside the leaf cells gives them a green appearance

  Answer: Because chlorophyll absorbs red and blue light and reflects green light

  Explanation: Chlorophyll, the pigment responsible for photosynthesis, absorbs mostly red and blue wavelengths of light for energy and reflects green light, which is what we see.

• Q4. The green pigment found in plant cells that captures sunlight for photosynthesis is called _____.

  Answer: chlorophyll

  Explanation: Chlorophyll is the light-absorbing pigment located in the chloroplasts of plant cells. It captures light energy that powers the photosynthesis process.

• Q5. A student places a healthy plant in a dark closet for two weeks with only water. What would most likely happen to the plant and why?

  • The plant would thrive because it only needs water to make food
  • The plant would grow faster because darkness helps conserve energy
  • The plant would weaken or die because it cannot perform photosynthesis without light
  • The plant would be unaffected because it stores enough food in its roots

  Answer: The plant would weaken or die because it cannot perform photosynthesis without light

  Explanation: Sunlight is a required ingredient for photosynthesis. Without light, the plant cannot produce glucose for energy, causing it to weaken and eventually die.

Grade

• Grade 5

Subject

• Science

Answer Key

• Answer: Plants use sunlight, water, and carbon dioxide to make their own food
• Number: 1
• Explanation: Photosynthesis requires three key ingredients — sunlight, water, and carbon dioxide — to produce glucose and oxygen.
• Answer: oxygen
• Number: 2
• Explanation: Oxygen is the byproduct of photosynthesis released into the atmosphere, which is essential for the survival of most living things.
• Answer: Because chlorophyll absorbs red and blue light and reflects green light
• Number: 3
• Explanation: Chlorophyll's molecular structure causes it to reflect green wavelengths while absorbing red and blue light for use in photosynthesis.
• Answer: chlorophyll
• Number: 4
• Explanation: Chlorophyll is the primary photosynthetic pigment in plants, housed within chloroplasts, and is responsible for capturing light energy.
• Answer: The plant would weaken or die because it cannot perform photosynthesis without light
• Number: 5
• Explanation: Light is an essential component of photosynthesis. Its absence prevents glucose production, depriving the plant of the energy it needs to survive.

Difficulty

• Medium

Total Questions

• 5

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