EARTH AND LIFE SCIENCE- 11 ABM 4

Which of the following statements is true about the earth’s subsystem?

• Most of the liquid water found in earth’s surface is potable

• If the earth had been bigger than its current size, it would have less gravity

• . It takes 500 seconds from light from the sun to reach the surface of the earth

• Earth is the only planet in the solar system having water in three phases: solid, liquid and gas.

Unlike other planets in the solar system, earth holds an atmosphere which has an essential function to life. What substance in the stratosphere is responsible for absorbing high-energy radiation from the sun?

• Ozone

• Methane

• Carbon Dioxide

• Diatomic Oxygen

One of the four subsystems of the earth is the atmosphere. Which of these is the correct sequence of atmospheric layer from the bottom up?

• stratosphere-mesosphere-troposphere-thermosphere

• troposphere-thermosphere- stratosphere-mesosphere

• stratosphere- troposphere-thermosphere-mesosphere

• troposphere-stratosphere-mesosphere-thermosphere

What is the gaseous layer that envelops the earth?

• Ionisphere

• Atmosphere

• Ozone layer

• Stratosphere

The largest among the four subsystems

• Biosphere

• Geosphere

• Atmosphere

• Hydrosphere

Oceans occupy what percent of earth’s water?

• 65%

• 71%

• 80%

• 98%

The second softest mineral according to the Mohs scale of hardness is the

• Talc

• Apatite

• Calcite

• Gypsum

Diamond is an example of mineral with

• Brilliant Luster

• Glassy Luster

• Pearly Luster

• Waxy Luster

What mineral has the capacity to scratch all other minerals?

• Topaz

• Quartz

• Flourite

• Diamond

What is the hardest known mineral on earth?

• Diamond

• Silicate

• Native Gold

• Muscovite