7.E1.1 and 7.E1.2 practice

Which gas is least likely to be found in the troposphere?

• argon

• chlorine

• nitrogen

• carbon dioxide

Which statement best explains the cause of atmospheric air pressure?

• Air molecules are pulled to Earth by gravity

• Air molecules are pushed to Earth by gravity

• The thermal energy of air molecules makes them become heavier and they sink to Earth

• The potential energy of air molecules makes them lighter and they rise into the atmosphere

Which statement best describes the relationship between air pressure and elevation as one gets closer to the troposphere?

• Air pressure increases as elevation increases

• Air pressure increases as elevation decreases

• Air pressure decreases as elevation decreases

• There is no clear relationship between air pressure and elevation

Which statement describes the air pressure in the atmosphere as the distance above Earth’s surface increases?

• Air pressure increases

• Air pressure decreases

• Air pressure remains constant

• There is no air pressure above the surface

Which statement best describes the mesosphere and exosphere?

• Both layers increase in temperature with increased altitude.

• Both layers decrease in temperature with increased altitude.

• The mesosphere increases in temperature, while the exosphere decreases in temperature with increased altitude.

• The mesosphere decreases, while the exosphere increases in temperature with increased altitude.

Which condition causes differences in air pressure in Earth’s atmosphere?

• equal heating

• equal cooling

• unequal cooling

• unequal heating

Which statement best describes air in Earth’s atmosphere?

• Air molecules have weight but do not move.

• Air molecules have no weight so they cannot move.

• Air molecules have weight and are in constant motion.

• Air molecules have no weight which allows them to move continually.

In which layer are molecules most likely to escape Earth’s atmosphere?

• exosphere

• stratosphere

• thermosphere

• troposphere

A weather report predicts warm temperatures and thunderstorms for the afternoon. How will the air pressure most likely change?

• A) It will increase.

• B) It will decrease.

• C) It will remain constant.

• D) It will decrease and then increase rapidly.

Which gas is second in abundance in Earth’s atmosphere?

• A) carbon dioxide

• B) nitrogen

• C) oxygen

• D) water