Middle School Science Review 8

Scientists divide earth's atmosphere into four main layers, classified according to changes in _________________.

• temperature
• weather
• westerlies
• humidity

What causes winds?

• differences in precipitation
• differences in humidity
• differences in air pressure

At the seashore late in the afternoon on a hot, sunny day, a person often feels a strong breeze coming in from the ocean.  Which of the following is the reason for the breeze?

• pounding waves generate air currents
• warm air over the ocean rushes in to replace the cool air that rises over land
• there are no clouds to block wind coming in
• heavy cool air over the ocean rushes in to replace warm air that rises over the land

The composition of the air is 78% _________.

• Oxygen
• Argon
• Carbon Dioxide
• Nitrogen

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

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

All of Earth's weather occurs in the _______________.

• stratosphere
• thermosphere
• troposphere
• mesosphere

The higher you go into the atmosphere, the air becomes ___________.

• more dense
• less dense 

What happens when an object absorbs electromagnetic waves?

• It bends the object
• It causes it to become warmer
• It causes it to become transparent
• It stays the same

The shortest wavelength in visible light is______.

• violet
• red
• blue
• yellow

This type of electromagnetic wave carries the greatest amount of energy. 

• x-rays
• gamma rays
• infrared rays
• visible light