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Quiz Explanations
Q.- 1. Matter has: Mass & volume
Matter is defined by two fundamental characteristics: it must have mass (the amount of substance) and occupy volume (space). While properties like shape, color, or taste can vary or change, mass and volume are present in all forms of matter.
Q – 2. Friction: Opposes motion
Friction is a force that acts between two surfaces that are sliding or trying to slide across each other. Its primary function is to resist or oppose the relative motion between those surfaces. This is why a rolling ball eventually comes to a stop.
Q. – 3 Isotopes differ in: Neutrons
Isotopes are atoms of the same element that have the same number of protons but a different number of neutrons. Because the number of neutrons differs, their atomic mass also changes, even though their chemical properties remain mostly the same.
Q. – 4 Displacement is: Vector
Displacement is a Vector quantity because it describes both “how far” an object has moved and “in which direction.” Unlike distance (which is scalar and only cares about the total path covered), displacement focuses on the straight-line change in position.
Q. – 5 Stomata help in: Gas exchange
Stomata are microscopic pores found on the surface of leaves. Their main role is to facilitate gas exchange by allowing Carbon Dioxide ( $$CO_2$$ ) to enter for photosynthesis and letting Oxygen ( $$O_2$$ ) and water vapor exit the plant.