Which energy source is sustainable? A. Coal B. Oil C. Solar D. Gas Explanation: Solar is sustainable.
Which instrument measures air pressure? A. Hygrometer B. Barometer C. Thermometer D. Anemometer Explanation: Barometer measures pressure.
Which cycle involves runoff? A. Nitrogen B. Carbon C. Water D. Rock Explanation: Runoff is water cycle component.
Which process produces zygote? A. Pollination B. Fertilization C. Germination D. Transpiration Explanation: Fusion of gametes forms zygote.
Which gas is essential for combustion? A. CO₂ B. O₂ C. N₂ D. H₂ Explanation: Oxygen supports burning.
Which energy is motion? A. Potential B. Thermal C. Kinetic D. Chemical Explanation: Motion defines kinetic energy.
Which process forms soil? A. Weathering B. Fusion C. Respiration D. Photosynthesis Explanation: Weathering breaks rocks.
Which organism eats dead matter? A. Producer B. Herbivore C. Carnivore D. Decomposer Explanation: Decomposers recycle nutrients.
Which process transports water upward? A. Diffusion B. Osmosis C. Transpiration D. Active transport Explanation: Transpiration pull drives ascent.