Science worksheet featuring 10 multiple-choice questions about biology concepts for students.
Science worksheet with multiple-choice questions on biology topics like photosynthesis, organs, and living systems.
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Show Answer Key & Explanations
Step-by-step solution for: 18 7th Grade Science Cells Worksheets | Science worksheets, Free ...
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Show Answer Key & Explanations
Step-by-step solution for: 18 7th Grade Science Cells Worksheets | Science worksheets, Free ...
Let's go through each question on the science worksheet and solve them one by one, providing explanations for the correct answers.
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1. Plants are able to carry out photosynthesis using energy from
a. their roots.
b. the Sun. ✔
c. water.
d. soil
✔ Answer: b. the Sun
Explanation: Photosynthesis is the process by which plants use sunlight to convert carbon dioxide and water into glucose (food) and oxygen. The energy source for this process is sunlight, which is absorbed by chlorophyll in the leaves.
---
2. Information collected in an experiment is called
a. data. ✔
b. graph.
c. conclusion.
d. response.
✔ Answer: a. data
Explanation: Data refers to the observations or measurements gathered during an experiment. Graphs and conclusions are derived from data, but the raw information itself is called data.
---
3. What do organisms obtain in food for growth and energy?
a. cells
b. DNA
c. oxygen
d. nutrients ✔
✔ Answer: d. nutrients
Explanation: Nutrients are substances found in food that provide energy and materials for growth, repair, and maintenance of the body. Examples include carbohydrates, proteins, fats, vitamins, and minerals.
---
4. What do fish use to breathe?
a. scales
b. lungs
c. blood
d. gills ✔
✔ Answer: d. gills
Explanation: Fish extract oxygen from water using gills, which are specialized respiratory organs. Water flows over the gills, and oxygen diffuses into the bloodstream while carbon dioxide is released.
---
5. The blood vessels that carry blood back to the heart are
a. veins. ✔
b. capillaries.
c. arteries.
d. valves.
✔ Answer: a. veins
Explanation: Veins carry deoxygenated blood (except pulmonary veins) back to the heart. Arteries carry blood away from the heart. Capillaries are tiny vessels where gas exchange occurs. Valves prevent backflow.
---
6. The basic building blocks of all living things are
a. tissues.
b. cells. ✔
c. organ systems.
d. muscles.
✔ Answer: b. cells
Explanation: All living organisms are composed of cells. This is a fundamental concept in biology known as the cell theory.
---
7. Reptiles, fish, and amphibians are all
a. warm-blooded vertebrates.
b. cold-blooded vertebrates. ✔
c. warm-blooded invertebrates.
d. cold-blooded invertebrates.
✔ Answer: b. cold-blooded vertebrates
Explanation: These animals are ectothermic (cold-blooded), meaning they rely on external sources of heat to regulate body temperature. They also have backbones, making them vertebrates.
---
8. The human body system that protects the body from diseases is the
a. immune system. ✔
b. digestive system.
c. nervous system.
d. circulatory system.
✔ Answer: a. immune system
Explanation: The immune system defends the body against pathogens like bacteria, viruses, and other harmful agents. It includes white blood cells, antibodies, and organs like the spleen and lymph nodes.
---
9. Birds, reptiles, fish, and mammals belong to the kingdom
a. Fungi
b. Protista
c. Animalia ✔
d. Plantae
✔ Answer: c. Animalia
Explanation: These animals are multicellular, heterotrophic (consume other organisms), and lack cell walls. They are all members of the kingdom Animalia.
---
10. Every organism is made up of one or more
a. viruses.
b. cells. ✔
c. bacteria.
d. biomes.
✔ Answer: b. cells
Explanation: According to the cell theory, all living things are composed of cells. Even single-celled organisms like bacteria are made of one cell.
---
1. b
2. a
3. d
4. d
5. a
6. b
7. b
8. a
9. c
10. b
Let me know if you'd like this formatted as a printable answer key!
---
1. Plants are able to carry out photosynthesis using energy from
a. their roots.
b. the Sun. ✔
c. water.
d. soil
✔ Answer: b. the Sun
Explanation: Photosynthesis is the process by which plants use sunlight to convert carbon dioxide and water into glucose (food) and oxygen. The energy source for this process is sunlight, which is absorbed by chlorophyll in the leaves.
---
2. Information collected in an experiment is called
a. data. ✔
b. graph.
c. conclusion.
d. response.
✔ Answer: a. data
Explanation: Data refers to the observations or measurements gathered during an experiment. Graphs and conclusions are derived from data, but the raw information itself is called data.
---
3. What do organisms obtain in food for growth and energy?
a. cells
b. DNA
c. oxygen
d. nutrients ✔
✔ Answer: d. nutrients
Explanation: Nutrients are substances found in food that provide energy and materials for growth, repair, and maintenance of the body. Examples include carbohydrates, proteins, fats, vitamins, and minerals.
---
4. What do fish use to breathe?
a. scales
b. lungs
c. blood
d. gills ✔
✔ Answer: d. gills
Explanation: Fish extract oxygen from water using gills, which are specialized respiratory organs. Water flows over the gills, and oxygen diffuses into the bloodstream while carbon dioxide is released.
---
5. The blood vessels that carry blood back to the heart are
a. veins. ✔
b. capillaries.
c. arteries.
d. valves.
✔ Answer: a. veins
Explanation: Veins carry deoxygenated blood (except pulmonary veins) back to the heart. Arteries carry blood away from the heart. Capillaries are tiny vessels where gas exchange occurs. Valves prevent backflow.
---
6. The basic building blocks of all living things are
a. tissues.
b. cells. ✔
c. organ systems.
d. muscles.
✔ Answer: b. cells
Explanation: All living organisms are composed of cells. This is a fundamental concept in biology known as the cell theory.
---
7. Reptiles, fish, and amphibians are all
a. warm-blooded vertebrates.
b. cold-blooded vertebrates. ✔
c. warm-blooded invertebrates.
d. cold-blooded invertebrates.
✔ Answer: b. cold-blooded vertebrates
Explanation: These animals are ectothermic (cold-blooded), meaning they rely on external sources of heat to regulate body temperature. They also have backbones, making them vertebrates.
---
8. The human body system that protects the body from diseases is the
a. immune system. ✔
b. digestive system.
c. nervous system.
d. circulatory system.
✔ Answer: a. immune system
Explanation: The immune system defends the body against pathogens like bacteria, viruses, and other harmful agents. It includes white blood cells, antibodies, and organs like the spleen and lymph nodes.
---
9. Birds, reptiles, fish, and mammals belong to the kingdom
a. Fungi
b. Protista
c. Animalia ✔
d. Plantae
✔ Answer: c. Animalia
Explanation: These animals are multicellular, heterotrophic (consume other organisms), and lack cell walls. They are all members of the kingdom Animalia.
---
10. Every organism is made up of one or more
a. viruses.
b. cells. ✔
c. bacteria.
d. biomes.
✔ Answer: b. cells
Explanation: According to the cell theory, all living things are composed of cells. Even single-celled organisms like bacteria are made of one cell.
---
✔ Final Answers:
1. b
2. a
3. d
4. d
5. a
6. b
7. b
8. a
9. c
10. b
Let me know if you'd like this formatted as a printable answer key!
Parent Tip: Review the logic above to help your child master the concept of 7th grade science worksheet with answers.
