Ear | MCQs

Explanation

22 April is celebrated as  World Earth Day

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Every year on April 22, Earth Day marks the anniversary of the birth of the modern environmental movement in 1970

Senator Gaylord Nelson made Earth Day on April 22

Explanation

The Arctic region of Earth is estimated to contain about 25% of the world's untapped oil and natural gas reserves.

This significant amount of resources has garnered interest for exploration.

Explanation

Oceans cover about 70 percent of the Earth's surface and about 97 percent of all water on and in the Earth is saline—there's a lot of salty water on our planet.

Explanation

The mass of Earth is approximately 6.0 x 10^24 kilograms (5.98 x 10^24 kg).

This is a widely accepted scientific value, based on various measurements and calculations, including:

• Gravity measurements
• Satellite orbits
• Seismological data
• Planetary formation models

Explanation

The sun rises in the East and sets in the West.

which means that the Earth is rotating from West to East. 

Earth revolves in orbit around the Sun in 365 days, 6 hours, 9 minutes.

with reference to the stars, at a speed ranging from 29.29 to 30.29 km/s.

The 6 hours, 9 minutes add up to about an extra day every fourth year,

which is designated a leap year, with the extra day added as February 29th.

Explanation

The stratosphere is a layer of Earth's atmosphere.

Stratosphere is the second layer of the atmosphere as you go upward.

Explanation

The mantle is crucial as it plays a key role in geological processes a such as plate tectonics, which affect earthquakes, volcanoes, and the formation of mountain ranges.

The structure of the earth is divided into four major components:

1. the crust,
2. the mantle,
3. the outer core,
4. the inner core.

Explanation

Seismic waves are waves of energy that travel through Earth's layers

 result of  volcanic eruptions.

 large landslides and large man-made explosions that give out low-frequency acoustic energy.

Explanation

Polar orbiting satellites travel over the Earth from pole to pole and are mainly used for collecting weather and climate data.

They provide detailed global coverage, useful for forecasting and environmental monitoring.

Explanation

The hypocenter is the point inside the Earth where the rocks break, causing an earthquake.

The point directly above the hypocenter on the surface is called the epicenter.