CTET CTET Science 5 — Questions and Answers
Question 1: Which phenomenon explains why a spoon partially submerged in a glass of water appears bent at the water's surface?
- Reflection of light
- Diffraction of light
- Refraction of light (Correct answer)
- Dispersion of light
Correct answer: Refraction of light
Refraction is the bending of light as it passes from one medium (water) to another (air) at different speeds, making the spoon appear bent.
Question 2: Which component of food provides the body with energy most quickly?
- Proteins
- Carbohydrates (Correct answer)
- Fats
- Minerals
Correct answer: Carbohydrates
Carbohydrates are broken down into glucose, which is the body's primary and quickest source of energy for cellular processes.
Question 3: A student notices that plants placed near a window grow toward the light. This response of plants to light is called:
- Geotropism
- Hydrotropism
- Phototropism (Correct answer)
- Thigmotropism
Correct answer: Phototropism
Phototropism is the directional growth response of plants toward (positive) or away from (negative) a source of light.
Question 4: What happens to the resistance of a metallic conductor when its temperature increases?
- Resistance decreases
- Resistance increases (Correct answer)
- Resistance remains the same
- Resistance first increases then decreases
Correct answer: Resistance increases
In metallic conductors, rising temperature causes atoms to vibrate more, impeding electron flow and increasing electrical resistance.
Question 5: Which method of food preservation uses high temperatures to kill microorganisms in milk without changing its taste significantly?
- Dehydration
- Refrigeration
- Pasteurization (Correct answer)
- Pickling
Correct answer: Pasteurization
Pasteurization heats milk to 72°C for 15 seconds to destroy harmful pathogens while minimally affecting flavor and nutritional value.
Question 6: In the water cycle, which process is responsible for the movement of water from the ocean into the atmosphere as water vapor?
- Precipitation
- Condensation
- Percolation
- Evaporation (Correct answer)
Correct answer: Evaporation
Evaporation is the process by which liquid water from oceans, lakes, and rivers absorbs heat energy and converts into water vapor in the atmosphere.
Question 7: A CTET science teacher uses concept mapping as an assessment tool. The primary advantage of this strategy is that it:
- Tests students' ability to memorize definitions accurately
- Reveals how students organize and connect scientific ideas (Correct answer)
- Reduces the time needed for written examinations
- Focuses assessment on procedural skills in the lab
Correct answer: Reveals how students organize and connect scientific ideas
Concept maps make students' mental models visible, allowing teachers to assess conceptual understanding and the relationships students see between ideas.
CTET CTET Science 5
Which phenomenon explains why a spoon partially submerged in a glass of water appears bent at the water's surface?