All Free Everyday Science MCQs with Answers

881. The strength of wave action depends on all these EXCEPT:

• A. Currents in the sea
• B. Wind strength
• C. Depth of coastal water
• D. Height of waves

Explanation: Wave action is chiefly affected by wind strength, wave height, and the depth of coastal water. Sea currents may modify waves, but they are not normally listed as the primary determining factor in this basic classification.

882. Bore is caused by______?

• A. Rising tide while meeting river currents
• B. Friction from prevailing winds
• C. Spring tide and strong winds
• D. Unequal heating of oceans

Explanation: A tidal bore forms when a rapidly rising incoming tide moves up a narrow river or estuary against the river's outgoing current. The opposing flows create a moving wall or surge of water.

883. Which of these is not a Metamorphic rock?

• A. Quartzite
• B. Slate
• C. Gneiss
• D. Schist
• E. Diorite ✓

Explanation: Quartzite, slate, gneiss, and schist are metamorphic rocks formed by heat and pressure. Diorite is an igneous rock that crystallizes from slowly cooled magma.

884. Which of the statements to about the Troposphere is not true?

• A. It contains 85-90% of the atmosphere's mass
• B. It contains nearly all the water and oxygen of the atmosphere
• C. It is the zone which exhibits changes in condition of weather
• D. It is about 350 km thick

Explanation: The troposphere contains most atmospheric mass and nearly all weather-related water vapour, and weather occurs within it. It is only about 8 to 18 km thick, not 350 km.

885. A canyon is a large form of ________?

• A. Dry valley
• B. Gorge
• C. Pediment
• D. Badiand

Explanation: A canyon is a deep, steep-sided valley produced mainly by river erosion over long periods. It is therefore a large form of gorge.

886. A wind which reverses seasonally is known as_____?

• A. Trade
• B. Cyclonic
• C. Monsoon
• D. Polar

Explanation: A monsoon is a seasonal wind system that reverses direction because land and sea heat and cool at different rates. Trade and polar winds do not undergo this regular seasonal reversal.

887. The Stevenson screen contains all of these EXCEPT:

• A. Wet bulb thermometer
• B. Maximum thermometer
• C. Ordinary thermometer
• D. Anemometer

Explanation: A Stevenson screen houses thermometers, including ordinary, maximum, and wet-bulb instruments, while shielding them from direct sunlight. An anemometer measures wind speed and is installed separately in an exposed position.

888. Weather describe the condition of ______ at any one time.

• A. The earth
• B. The land surface
• C. The atmosphere
• D. The ionosphere

Explanation: Weather describes the short-term condition of the atmosphere, including temperature, pressure, wind, humidity, and precipitation. Climate, by contrast, describes long-term patterns.

889. Water vapour turns into clouds in the atmosphere when:

• A. It rains
• B. The temperature rise
• C. Dew point is reached
• D. Evaporation takes place

Explanation: As moist air cools to its dew point, it becomes saturated and water vapour condenses on tiny particles to form cloud droplets or ice crystals. Rain is a later possible result, not the condition that starts cloud formation.

890. When a warm air is lifted off the surface in temperature depression it is called ________?

• A. An occlusion
• B. A cold front
• C. An anticyclone
• D. A warm front

Explanation: In an occlusion, a faster-moving cold front catches a warm front and lifts the warm air completely off the ground. A warm front lifts warm air gradually, but does not necessarily remove it from the surface.