Semester 2 Exam 7th Grade

Which pie chart correctly shows the percentages of elements in the air?

• a
• b
• c
• d

Where you will find the ozone layer.

• stratosphere
• thermosphere
• exosphere
• mesosphere

Where weather occurs.

• stratosphere
• thermosphere
• troposphere
• mesosphere

Where we live.

• stratosphere
• thermosphere
• troposphere
• mesosphere

The hottest layer.

• troposphere
• thermosphere
• exosphere
• mesosphere

What does the earth's atmosphere do?

• help to regulate the temperature on Earth
• Help UV rays to reach the Earth's surface
• Creates meteors in the sky
• Keep ocean waters cold

As you go higher in the troposphere, the temperature _______________.

• decreases
• increases
• stays the same
• gets very hot

What is the function of the ozone layer?

• to allow UV rays to get to Earth
• to block UV rays from getting to Earth
• To keep oxygen in
• to allow meteors to get to Earth

This is the layer where most commercial jet airliners fly.

• Troposphere
• Stratosphere
• Mesosphere
• Thermosphere

The higher you go, the air becomes _____ _____.

• More dense
• Less dense