NC Finals Review: 7th Grade Science

Why is the Mesosphere colder than the Troposphere?

• Because the Mesosphere is closer to the ground

• Because the Mesosphere contains ozone

• Because the molecules in the Mesosphere are spaced farther apart

• Because the molecules in the Troposphere are spaced farther apart

Why does the troposphere experience the greatest amount of atmospheric pressure compared to the other atmospheric layers?

• It produces the ozone layer.

• It has the highest temperatures.

• It contains a high concentration of gas particles.

• It is the region in which weather occurs.

Which explains why most of the rain that falls comes from the ocean?

• The majority of evaporation takes place over the ocean.

• The majority of evaporation takes place over the ocean.

• Most rivers deposit freshwater into the ocean.

• Most clouds form near or over the ocean.

Which statement is false when cold front collides with a warm front?

• The front would stop, and the temperature would drop.

• The warm air would move overtop of the cold air producing light rain show

• The cold front would force the warm air upward producing thunderstorms.

• The cold air would push the warm air further to the south.

Barometric pressure has been dropping all day. What weather conditions will most likely occur?

• sunny weather

• stormy weather

• calm weather

• hot weather

What is most likely occuring if the land temperature near the beach is rising more rapidly than the ocean temperature?

• A low pressure air mass is forming over the land while a high pressure air mass is forming over the ocean.

• Differences in air pressure over land and ocean are causing a sea breeze to occur.

• A land breeze is forming and wind speed and direction is changing.

• The humidity is increasing because more condensation is occurring over land.

A sea breeze blows from the ocean toward the shore. Why does this occur?

• High pressure over the land causes downdraft to occur.

• The tide carries the wind to the shore as it moves back and forth.

• Conduction of heat from the warm water produces wind from the ocean.

• Air over land heats faster than air over water, which causes convection.

Why would the Environmental Protection Agency seek to monitor atmospheric pollution and air quality?

• to make sure the air pressure remains constant over time

• to make it rain in drought affected areas

• to maintain the respiratory health of humans

• to reduce the amount of oxygen released by rainforests

Why is it important to monitor the atmosphere during and after natural events, such as forest fires and volcanic eruptions?

• These events increase the amount of oxygen, which may contribute to a decrease in respiratory illnesses.

• These events decrease the amount of dust, which may contribute to an increase in respiratory illnesses.

• These events increase the level of harmful particles, which may contribute to an increase in respiratory illnesses.

• These events decrease the amount of greenhouse gases, which may contribute to a decrease in respiratory illnesses.

Which occurs within a high-pressure system?

• the formation of tornadoes

• the formation of hurricanes

• large clouds, as air rises

• calm weather, as air sinks