Class 6 Science: Concept Check Quiz
Eight medium-difficulty multiple-choice questions that test key Class 6 science concepts through definition, application, and scenario-based thinking.
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Quiz Questions & Answers
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Question 1: What best describes a physical change?
A change where matter alters form but not chemical identity
A change that always releases heat and light
A change that creates a new substance with different molecules
A change that cannot be reversed by any method
Question 2: Which situation shows conduction transferring heat?
A metal spoon becoming hot where it touches a pot on the stove
Steam turning into water on a cold surface
Warm air rising from a heater and circulating in a room
Sunlight warming your skin outdoors
Question 3: Which adaptation helps plants reduce water loss in dry climates?
Shallow roots that spread quickly on the surface
Thin bark to allow faster gas exchange
Bright colored flowers to attract insects
Small or waxy leaves that limit evaporation
Question 4: Why are decomposers important in an ecosystem?
They break down dead matter and recycle nutrients back to soil
They are primary consumers that eat plants
They stop food chains from having predators
They produce most of the oxygen in air by photosynthesis
Question 5: Which statement explains why light bends when entering water?
Water pulls light rays with its gravity
Light scatters more in water because of dissolved salts
Water creates new light beams that replace the original rays
Light speed changes in water, causing refraction at the boundary
Question 6: Which option best shows how microorganisms can be beneficial?
Microbes only grow on spoiled food and are useless
Bacteria in the gut help digest food and make vitamins
All microorganisms always cause infections
Microorganisms cannot survive outside a lab
Question 7: If a balloon sticks to a wall after rubbing, what is the main cause?
Chemical glue forms on the balloon surface
Static electricity makes opposite charges attract between balloon and wall
Magnetic forces between rubber and plaster
Air pressure pushes the balloon against the wall
Question 8: Which habit most helps reduce soil erosion in a sloped field?
Applying a thick layer of sand over the soil surface
Planting rows along contour lines to slow water flow
Digging deep channels down the slope for quick drainage
Removing all vegetation to expose the soil