Chapter 16-1Study Guide

Answers

Number 1

• Water gets from Earth’s surface into the air by the process of evaporation.

Number 2

• Clouds form from the process of condensation.

Number 3

• Rain is the most common form of precipitation.

Number 4

• Runoff carries water from precipitation into the oceans.

Number 5

• Relative humidity is a percentage that shows how much water vapor is in the air compared to how much the air can actually hold at a certain temperature.

Number 6

• A psychrometer is used to measure the relative humidity of the air.

Number 7

• Humidity is the amount of water vapor in the air.

Number 8

• Saturated air has a relative humidity of 100%. It is holding all the water vapor that it can at a certain temperature.

Number 9

• Air can become saturated when water vapor is added to the air through evaporation or when air cools to its dew point.

Number 10

• Dew point is the temperature at which gas condenses into a liquid.

Number 11

• The air’s ability to hold water vapor will increase if the air’s temperature increases.

Number 12

• Clouds are made of millions of tiny water droplets or ice crystals.

Number 13

• Cumulus clouds bring fair weather. No rain.

Number 14

• Cumulonimbus clouds bring thunderstorms.

Number 15

• Nimbostratus clouds bring light to heavy continuous rain.

Number 16

• An altocumulus cloud is a puffy mid-level cloud that indicates fair weather.

Number 17

• A cirrostratus cloud is layered and is made of ice crystals. Found at high altitudes.

Number 18

• Cumulonimbus clouds are found from low to high altitudes. Very large clouds.

Number 19

• Stratus clouds form in layers. They can cover large areas of the sky and block out the sun.

Number 20

• Fog is a stratus cloud that has formed on the ground.

Number 21

• Sleet starts as rain and freezes in the air.• Snow forms when water vapor changes

directly to a solid.

Number 22

• Hail is balls or lumps of ice that fall from cumulonimbus clouds.

• Hail forms when updrafts of air in a cumulonimbus clouds carries raindrops high I the clouds, the raindrops freeze and hail forms.