EARTH'S SUBSYSTEMS AND INTERNAL STRUCTURES

What is the coldest layer of the atmosphere?

• troposphere

• stratosphere

• mesosphere

• thermosphere

How many percent of the Earth's water is freshwater?

• 1%

• 3%

• 21%

• 97%

What separates the outer core from the inner core?

• Mohorovicic Discontinuity

• Gutenberg

  Discontinuity

• Lehmann Discontinuity

Weather disturbances occur in the ___________.

• troposphere

• stratosphere

• exosphere

• thermosphere

Which of these is NOT part of the geosphere?

• rock cycle

• formation of weather disturbances

• formation of minerals

• volcanic activities

Which of these continents rifted from Gondwana?

• Africa

• North America

• Europe

• Asia

Which of these materials primarily make up the Earth's mantle?

• basaltic rocks

• granitic rocks

• silicate rocks rich in iron and magnesium

• melted iron and nickel

Auroras / Northern and Southern lights occur in  the ______.

• exosphere

• thermosphere

• mesosphere

• stratosphere

Which part of the earth is also known as the "weak sphere"?

• asthenosphere

• lithosphere

• mantle

• outer core

What separates the crust and the mantle?

• Mohorovicic Discontinuity

• Gutenberg Discontinuity

• Lehmann Discontinuity