Science worksheet featuring multiple-choice questions on biology concepts for students.
Science worksheet with multiple-choice questions about biology topics including photosynthesis, animal systems, and classification.
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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 solve each question step by step and provide explanations for the answers.
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- Options: a) their roots, b) the Sun, c) water, d) soil
- Correct Answer: b) the Sun
- Explanation: Photosynthesis is the process by which plants convert light energy into chemical energy. The primary source of this light energy is sunlight. While water and carbon dioxide are also essential for photosynthesis, the energy required comes directly from the Sun.
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- Options: a) data, b) graph, c) conclusion, d) response
- Correct Answer: a) data
- Explanation: In scientific experiments, the information gathered during observations or measurements is referred to as "data." Graphs, conclusions, and responses are derived from or based on the data but are not the raw information collected.
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- Options: a) cells, b) DNA, c) oxygen, d) nutrients
- Correct Answer: d) nutrients
- Explanation: Nutrients are substances that organisms obtain from food to support growth, repair tissues, and provide energy. Cells, DNA, and oxygen are important components of living organisms, but they are not obtained directly from food.
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- Options: a) scales, b) lungs, c) blood, d) gills
- Correct Answer: d) gills
- Explanation: Fish extract oxygen from water using specialized organs called gills. Scales protect the fish, lungs are used by terrestrial animals, and blood is part of the circulatory system but does not facilitate breathing.
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- Options: a) veins, b) capillaries, c) arteries, d) valves
- Correct Answer: a) veins
- Explanation: Veins are blood vessels that transport deoxygenated blood from body tissues back to the heart. Arteries carry oxygenated blood away from the heart, capillaries facilitate exchange between blood and tissues, and valves regulate blood flow but are not vessels.
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- Options: a) tissues, b) cells, c) organ systems, d) muscles
- Correct Answer: b) cells
- Explanation: Cells are the fundamental units of life. All living organisms, whether single-celled or multicellular, are composed of cells. Tissues, organ systems, and muscles are higher-level structures formed by groups of cells.
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- Options: a) warm-blooded vertebrates, b) cold-blooded vertebrates, c) warm-blooded invertebrates, d) cold-blooded invertebrates
- Correct Answer: b) cold-blooded vertebrates
- Explanation: Reptiles, fish, and amphibians are all vertebrates (animals with backbones). They are also ectothermic (cold-blooded), meaning their body temperature depends on external environmental conditions.
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- Options: a) immune system, b) digestive system, c) nervous system, d) circulatory system
- Correct Answer: a) immune system
- Explanation: The immune system defends the body against pathogens (disease-causing agents) such as bacteria, viruses, and fungi. The digestive system processes food, the nervous system controls bodily functions, and the circulatory system transports blood and nutrients.
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- Options: a) Fungi, b) Protista, c) Animalia, d) Plantae
- Correct Answer: c) Animalia
- Explanation: Birds, reptiles, fish, and mammals are all animals, so they belong to the kingdom Animalia. Fungi, Protista, and Plantae are different kingdoms that include non-animal organisms.
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- Options: a) viruses, b) cells, c) bacteria, d) biomes
- Correct Answer: b) cells
- Explanation: All organisms, whether unicellular (composed of one cell) or multicellular (composed of many cells), are made up of cells. Viruses are not considered living organisms, bacteria are single-celled organisms, and biomes refer to large ecosystems, not individual organisms.
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1. b) the Sun
2. a) data
3. d) nutrients
4. d) gills
5. a) veins
6. b) cells
7. b) cold-blooded vertebrates
8. a) immune system
9. c) Animalia
10. b) cells
Boxed Final Answer:
\[
\boxed{b, a, d, d, a, b, b, a, c, b}
\]
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1. Plants are able to carry out photosynthesis using energy from:
- Options: a) their roots, b) the Sun, c) water, d) soil
- Correct Answer: b) the Sun
- Explanation: Photosynthesis is the process by which plants convert light energy into chemical energy. The primary source of this light energy is sunlight. While water and carbon dioxide are also essential for photosynthesis, the energy required comes directly from the Sun.
---
2. Information collected in an experiment is called:
- Options: a) data, b) graph, c) conclusion, d) response
- Correct Answer: a) data
- Explanation: In scientific experiments, the information gathered during observations or measurements is referred to as "data." Graphs, conclusions, and responses are derived from or based on the data but are not the raw information collected.
---
3. What do organisms obtain in food for growth and energy?
- Options: a) cells, b) DNA, c) oxygen, d) nutrients
- Correct Answer: d) nutrients
- Explanation: Nutrients are substances that organisms obtain from food to support growth, repair tissues, and provide energy. Cells, DNA, and oxygen are important components of living organisms, but they are not obtained directly from food.
---
4. What do fish use to breathe?
- Options: a) scales, b) lungs, c) blood, d) gills
- Correct Answer: d) gills
- Explanation: Fish extract oxygen from water using specialized organs called gills. Scales protect the fish, lungs are used by terrestrial animals, and blood is part of the circulatory system but does not facilitate breathing.
---
5. The blood vessels that carry blood back to the heart are:
- Options: a) veins, b) capillaries, c) arteries, d) valves
- Correct Answer: a) veins
- Explanation: Veins are blood vessels that transport deoxygenated blood from body tissues back to the heart. Arteries carry oxygenated blood away from the heart, capillaries facilitate exchange between blood and tissues, and valves regulate blood flow but are not vessels.
---
6. The basic building blocks of all living things are:
- Options: a) tissues, b) cells, c) organ systems, d) muscles
- Correct Answer: b) cells
- Explanation: Cells are the fundamental units of life. All living organisms, whether single-celled or multicellular, are composed of cells. Tissues, organ systems, and muscles are higher-level structures formed by groups of cells.
---
7. Reptiles, fish, and amphibians are all:
- Options: a) warm-blooded vertebrates, b) cold-blooded vertebrates, c) warm-blooded invertebrates, d) cold-blooded invertebrates
- Correct Answer: b) cold-blooded vertebrates
- Explanation: Reptiles, fish, and amphibians are all vertebrates (animals with backbones). They are also ectothermic (cold-blooded), meaning their body temperature depends on external environmental conditions.
---
8. The human body system that protects the body from diseases is the:
- Options: a) immune system, b) digestive system, c) nervous system, d) circulatory system
- Correct Answer: a) immune system
- Explanation: The immune system defends the body against pathogens (disease-causing agents) such as bacteria, viruses, and fungi. The digestive system processes food, the nervous system controls bodily functions, and the circulatory system transports blood and nutrients.
---
9. Birds, reptiles, fish, and mammals belong to the kingdom:
- Options: a) Fungi, b) Protista, c) Animalia, d) Plantae
- Correct Answer: c) Animalia
- Explanation: Birds, reptiles, fish, and mammals are all animals, so they belong to the kingdom Animalia. Fungi, Protista, and Plantae are different kingdoms that include non-animal organisms.
---
10. Every organism is made up of one or more:
- Options: a) viruses, b) cells, c) bacteria, d) biomes
- Correct Answer: b) cells
- Explanation: All organisms, whether unicellular (composed of one cell) or multicellular (composed of many cells), are made up of cells. Viruses are not considered living organisms, bacteria are single-celled organisms, and biomes refer to large ecosystems, not individual organisms.
---
Final Answers:
1. b) the Sun
2. a) data
3. d) nutrients
4. d) gills
5. a) veins
6. b) cells
7. b) cold-blooded vertebrates
8. a) immune system
9. c) Animalia
10. b) cells
Boxed Final Answer:
\[
\boxed{b, a, d, d, a, b, b, a, c, b}
\]
Parent Tip: Review the logic above to help your child master the concept of science 7th grade worksheet.
