Earth and Space Science Practice Questions

1. The ozone layer is found in the

   1. troposphere
   2. stratosphere
   3. mesosphere
   4. thermosphere

2. What is the layer that is located immediately beneath the Earth's crust?

   1. inner core
   2. plates
   3. mantle
   4. outer core

3. The clouds that occur at the highest altitude are called

   1. cirrus
   2. cumulus
   3. nimbus
   4. stratus

4. Life on Earth has existed for approximately

   1. 4.6 billion years
   2. 3.5 billion years
   3. 2.5 billion years
   4. 544 million years

5. Which of the following is most responsible for the oceanic tides?

   1. the gravitational pull of the Sun on the Earth
   2. the gravitational pull of the Moon on the Earth
   3. the heat of the Sun
   4. the magnetic pull of the poles

6. The most common element in the Earth's atmosphere is

   1. helium
   2. hydrogen
   3. nitrogen
   4. oxygen