Science U4 L1&2

Question 1

Weather

Answer 1

Condition of Earth;s atmosphere at a certain time and place

Question 2

What terms can you use to describe weather?

Answer 2

temperature
humidity
precipitation
air pressure
wind
visibility

Question 3

An instrument used to measure and display temperature

Answer 3

thermometer

Question 4

The amount of water vapor in the air

Answer 4

Humidity

Question 5

The amount of water vapor in the air compared to the amount of water vapor needed to reach saturation

Answer 5

Relative Humidity

Question 6

The temperature at which more condensation than evaporation occurs

Answer 6

Dew Point

Question 7

What happens when air cools below its dew point?

Answer 7

More water vapor condenses into water than evaporates

Question 8

What happens as the air becomes more unsaturated?

Answer 8

More evaporation than condensation occurs

Question 9

Precipitation

Answer 9

any form of water that falls to Earth’s surface from the clouds

Question 10

Four main forms of evaporation

Answer 10

rain
snow
hail sleet

Question 11

What does the translation for the word Cirrus

Answer 11

curly

Question 12

Air Pressure

Answer 12

force of air molecules pushing on an area

Question 13

Wind

Answer 13

air that moves horizontally or parallel to the ground

Question 14

What is used to measure wind speed?

Answer 14

Anemometer

Question 15

How do you measure wind direction?

Answer 15

Wind vane or windstock

Question 16

Visibility

Answer 16

a measure of the transparency of the atmosphere

Question 17

List two factors that may affect visibility

Answer 17

air pollution

fog

Question 18

Wind moves from ____________ pressure to areas of ____________ pressure

Answer 18

higher to lower

Question 19

How do you measure precipitation

Answer 19

rain gauge or meterstick

Question 20

How do you measure relative humidity?

Answer 20

Pschorometer

Question 21

Cloud

Answer 21

collection of small water droplets or ice crystals

Question 22

How much precipitation falls in the desert?

Answer 22

less than 25 cm

Question 23

Evaporation

Answer 23

the change of state from a liquid to a gas

Question 24

The surfaces on which water droplets condense

Answer 24

cloud condensation nuclei

Question 25

what is the composition of a cloud in high altitudes?

Answer 25

mostly ice crystals

Question 26

horizontal movement of air

Answer 26

wind

Question 27

Explain what orographic lifting is

Answer 27

when an obstacle such as a mountain range forces a mass of air upward

Question 28

Stratus clouds

Answer 28

thin and flat, edges not clearly defined

Question 29

Stratus is a Latin word that means what?

Answer 29

Layer

Question 30

What type of cloud is fog?

Answer 30

Stratus cloud that falls near the ground

Question 31

Cumulus clouds

Answer 31

thick and puffy on top and generally flat on the bottom
well defined edges
can change shape rapidly
cumulus clouds can be bright white or dark and with severe weather

Question 32

Cirrus

Answer 32

feathery with curly ends
white clouds
form high in the atmosphere, cold temperatures
made of ice crystals

Question 33

What does cumulus stand for

Answer 33

heap

Question 34

Low clouds

Answer 34

nimbus
between Earth’s Surface and 2,000 m
clouds usually made from water droplets

Question 35

Middle clouds

Answer 35

between 2,000 and 6,000 m
most commonly made from water droplets
alto

Question 36

High clouds

Answer 36

above 6,000 m
temperature below freezing
mostly made of ice crystals
Cirro

Question 37

Clouds of vertical development

Answer 37

higher than 12,000 m
commonly formed by the rapid lifting of warm, moist air, which can result in strong vertical growth
eg. cumulus and cumolonumbus

Question 38

why doesn’t cloud formation take place until the dew-point temperature is reached?

Answer 38

because it has to have enough water.