Science Quiz Questions And Answers For Class 10
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Are you excited to try these Science quiz questions and answers for class 10? As a tenth grader, you are expected to answer the following questions correctly and revise the ones you fail at. Do you believe that you understood most of the things taught in the science class?
Delve into the intricacies of science with our thought-provoking quiz designed for Class 10. This quiz encapsulates a spectrum of scientific domains, from physics and chemistry to biology and environmental studies. Crafted to engage and enrich, each question is poised to test and broaden the understanding of budding scientists.
Navigate through Read morethe complexities of scientific principles, explore the wonders of the natural world, and unravel the mysteries of the cosmos. This quiz serves as a dynamic tool for students to assess their scientific prowess, with answers provided for comprehensive learning.
Spark intellectual curiosity, encourage critical thinking, and let this quiz be a beacon for scientific exploration in the vibrant minds of Class 10 students.
Science for class 10 Questions and Answers
- 1.
Which gas is needed for photosynthesis?
- A.
Oxygen
- B.
Carbon dioxide
- C.
Hydrogen
- D.
Carbon monoxide
Correct Answer
B. Carbon dioxideExplanation
Carbon dioxide is needed for photosynthesis because it is fixed by plants to produce glucose and oxygen. During photosynthesis, plants use sunlight, water, and carbon dioxide to create glucose, which is their source of energy. Oxygen is also produced as a byproduct of this process. Without carbon dioxide, plants would not be able to carry out photosynthesis and produce the necessary energy for the growth and survival of the vast majority of the Earth’s organisms, which require oxygen and glucose.Rate this question:
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- 2.
What type of energy is required for photosynthesis to happen?
- A.
Light
- B.
Heat
- C.
Electrical
- D.
Sand
Correct Answer
A. LightExplanation
Photosynthesis is the process where plants convert light energy into chemical energy in the form of glucose. This energy is essential for the growth and development of plants. The correct answer is light, as it is the primary source of energy that drives the photosynthetic process. Heat and electrical energy do not play a direct role in photosynthesis, and sand is not a form of energy.Rate this question:
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- 3.
What is the waste by-product of photosynthesis?
- A.
Oxygen
- B.
Carbon dioxide
- C.
Glucose
- D.
None of the above
Correct Answer
A. OxygenExplanation
During photosynthesis, plants convert carbon dioxide and water into glucose and oxygen. Oxygen is released as a waste by-product and is released into the atmosphere.Rate this question:
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- 4.
Tomatoes in a greenhouse grow faster if the carbon dioxide concentration is increased. Why is that?
- A.
The temperature must have been a limiting factor.
- B.
Carbon dioxide concentration must have been a limiting factor earlier.
- C.
Light intensity must have been a limiting factor.
- D.
None of the above
Correct Answer
B. Carbon dioxide concentration must have been a limiting factor earlier.Explanation
Increasing the carbon dioxide concentration in a greenhouse promotes faster growth of tomatoes. This suggests that the availability of carbon dioxide was a limiting factor in the growth of tomatoes. The other options, temperature and light intensity, are not mentioned in the given information and therefore cannot be inferred as limiting factors.Rate this question:
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- 5.
What is the equation of photosynthesis?
- A.
Oxygen + glucose → carbon dioxide + water
- B.
Carbon dioxide + oxygen → glucose + water
- C.
Carbon dioxide + water → glucose + oxygen
- D.
None of the above
Correct Answer
C. Carbon dioxide + water → glucose + oxygenExplanation
Photosynthesis is the process by which plants convert light energy into chemical energy in the form of glucose. This process takes place in chloroplasts, which contain the green pigment chlorophyll. Chlorophyll absorbs light energy, which is used to split water molecules into oxygen and hydrogen. The hydrogen is then combined with carbon dioxide to produce glucose.Rate this question:
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- 6.
Why do plants need nitrate ions?
- A.
To make proteins
- B.
To make fatty acids
- C.
To make starch for storage
- D.
To make chlorophyll
Correct Answer
A. To make proteinsExplanation
Plants need nitrate ions primarily to make proteins. Nitrate ions are a key source of nitrogen, which is an essential element for the synthesis of amino acids, the building blocks of proteins. These proteins are crucial for plant growth, development, and various metabolic processes. While nitrogen is also a component of chlorophyll, its primary role through nitrate ions is in protein synthesis.Rate this question:
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- 7.
Photosynthesis takes place in the root.
- A.
True
- B.
False
Correct Answer
B. FalseExplanation
Photosynthesis is the process by which green plants, algae, and some bacteria convert sunlight, carbon dioxide, and water into glucose and oxygen. This process occurs in the chloroplasts, which are typically found in the leaves of plants. The root, on the other hand, is responsible for absorbing water and nutrients from the soil and is usually not exposed to sunlight. Therefore, photosynthesis does not take place in the root.Rate this question:
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- 8.
What is the substance that makes leaves look green?
- A.
Leaf
- B.
Palisade
- C.
Chlorophyll
- D.
Chloroplasts
Correct Answer
C. ChlorophyllExplanation
Chlorophyll is the correct answer because it is the green pigment found in leaf cells that is responsible for absorbing light energy for photosynthesis. It is located in the chloroplasts, which are the organelles where photosynthesis takes place. Chlorophyll is essential for plants to convert sunlight into chemical energy, allowing them to produce glucose and oxygen. Without chlorophyll, plants would not be able to carry out photosynthesis, where light is required to catalyze the reaction.Rate this question:
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- 9.
Where does photosynthesis takes place in?
- A.
Chloroplasts
- B.
Roots
- C.
Palisade
- D.
None
Correct Answer
A. ChloroplastsExplanation
Chloroplasts are the organelles found in plant cells where photosynthesis takes place. Inside the chloroplasts, chlorophyll captures solar and light energy, which is then used to convert carbon dioxide and water into glucose and oxygen through a series of chemical reactions. This process is known as photosynthesis and is essential for the plant's survival as it provides the energy needed for growth and development. Therefore, the correct location for photosynthesis is within the chloroplasts.Rate this question:
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- 10.
What is the primary function of the ozone layer in the Earth's atmosphere?
- A.
To provide oxygen for terrestrial life
- B.
To absorb and scatter solar ultraviolet light
- C.
To regulate the Earth’s temperature
- D.
To act as a shield against meteorites
Correct Answer
B. To absorb and scatter solar ultraviolet lightExplanation
The ozone layer, located in the Earth's stratosphere, plays a critical role in protecting living organisms by absorbing the majority of the sun's harmful ultraviolet (UV) radiation. Without this protective layer, UV radiation would be intense enough on Earth’s surface to cause severe damage to the DNA of plants and animals, leading to increased rates of skin cancer and cataracts in humans, and detrimental effects on aquatic ecosystems and agricultural productivity.Rate this question:
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- 11.
What is the law of conservation of mass in a chemical reaction?
- A.
Matter is neither created nor destroyed, only transformed.
- B.
Mass increases as energy decreases in a reaction.
- C.
Energy is neither created nor destroyed, but it can change forms.
- D.
The total energy of an isolated system remains constant.
Correct Answer
A. Matter is neither created nor destroyed, only transformed.Explanation
The law of conservation of mass states that in a closed or isolated system, the total mass of the reactants before a chemical reaction must equal the total mass of the products after the reaction. This means that atoms are neither created nor destroyed during a chemical reaction, but simply rearranged to form different substances. This fundamental principle is crucial for understanding chemical reactions and balancing chemical equations.Rate this question:
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Quiz Review Timeline +
Our quizzes are rigorously reviewed, monitored and continuously updated by our expert board to maintain accuracy, relevance, and timeliness.
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Current Version
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Jan 15, 2025Quiz Edited by
ProProfs Editorial Team
Expert Reviewed by
Daniel P -
May 04, 2012Quiz Created by
Abdul Jalil
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