26. When animals have long period of sleep to survive a cold and dangerous winter, they go for
(A) Migration
(B) hibernation
(C) vacation
(D) revolution
Answer:
(B) hibernation
Explanation:
Hibernation is a biological state of minimal physical activity and significantly lowered metabolic rate that some animals undergo to conserve energy during harsh winter conditions when food is scarce.
27. Seed stores the food for baby plant in
(A) seed coat
(B) seed leaves (cotyledons)
(C) embryo
(D) plumule
Answer:
(B) seed leaves (cotyledons)
Explanation:
The cotyledons, frequently referred to as seed leaves, act as a vital energy storage unit, providing the developing embryo (the baby plant) with the necessary nutrients it needs to germinate.
28. Which of the these would change water to water vapour?
(A) Evaporation
(B) Condensation
(C) Precipitation
(D) Collection
Answer:
(A) Evaporation
Explanation:
Evaporation is the physical change of state where liquid water absorbs thermal energy and turns into a gas (water vapor).
29. Which of the following states of matter would not change shape if it was placed in a jar ?
(A) liquid
(B) gas
(C) solid
(D) all of these
Answer:
(C) solid
Explanation:
Solids are characterized by having a fixed volume and a definite structural shape due to tightly packed molecules, meaning they do not flow or conform to the shape of their container.
30. Growing children like you need more
(A) carbohydrates
(B) fats
(C) proteins
(D) none of these
Answer:
(C) proteins
Explanation:
Proteins are fundamental macronutrients composed of amino acids, which serve as the building blocks for the body’s tissues, muscles, and enzymes, making them exceptionally crucial during periods of rapid childhood growth.
