4Th Grade Science, Weather

Front 1

High Air Pressure causes what type of weather?

Back 1

nice Weather because it is less dense, less moisture

Front 2

Lower Air Pressure causes what type of weather?

Back 2

Stormy weather, more moisture more denser

Front 3

What is a barometer?

Back 3

Measures Air Pressure

Front 4

Where does the world's weather occur in the atmosphere most often?

Back 4

Troposphere. The lowest layer of the atmosphere.

Front 5

What is the Troposphere?

Back 5

The layer of air that is closest to the earth's surface.

Front 6

What is the atmosphere?

Back 6

Air that surrounds the earth.

Front 7

What are the aspects of Weather?

Back 7

WHAT C

Wind
humidity
air pressure
Temperature
Clouds

Front 8

What is weather?

Back 8

the condition that exist in the air.

Raining, snowing or sunny.

Front 9

What are clouds?

Back 9

Masses of water droplets and Ice crystals that float in the sky.

Front 10

What is humidity?

Back 10

the amount of moisture in the air.

Front 11

What are the two temperature Scales?

What are they based on?

Back 11

Gabriel Fahrenheit - based the zero as the lowest point the mercury fell during the winter in Germany, which made 32 the freezing point and 212 the boiling point.

Anders Celsius based zero as the freezing point and a 100 as the boiling point.

Front 12

What is temperature?

Back 12

measures the amount of heat in the air.

Front 13

What is wind?

Back 13

Wind is when the sun heats the land and warms the air above. The air molecules move faster, when they are heated up and that is what causes the air to move.

Also hot air rises and replace by cold air.

Front 14

What is air Pressure?

Back 14

Air pressure is the measure of the force of air pressing down on the earth.

air pressure depends on the density of the Air.

Front 15

What affects air pressure?

Back 15

The factors that affect air pressure are the factors that cause the air density, which are...

WET V

water
elevation
temperature
vapor

Front 16

What is a front?

Back 16

When two air masses meet that are different. They do not mix easily so a boundary forms.

This boundary is called a front.

Front 17

What are the 4 types of Fronts?

Back 17

Cold Fronts
Warm Fronts
Occuled Front
Stationary fronts

Front 18

What is a cold Front?

Back 18

When cold air mass meets and pushes under warm air mass.

violent storms occur.

Front 19

What is a warm Front?

Back 19

When warm air moves over a cold air mass.

Rain & showers, usually hot humid weather.

Front 20

What is an occuled Front?

Back 20

When a cold front moves faster than a warm front.

the cold front overtakes the warm front, to form an occuled front, which pushes the warm air upward.

Less severe.

Front 21

stationary front?

Back 21

When a warm air mass meets a cold air mass and it doesn't move.

bad weather for many days.

Front 22

What is relative humidity?

Back 22

Relative humidity is humidity relative to temperature.

Front 23

How do you measure relative humidity?

Back 23

With a Psychrometer.

Since the psychrometer uses 2 thermometers to measure the temperature, the humidity is relative to the temperature.

Front 24

What holds more moisture, cold air or warm air?

Back 24

warm air.

Front 25

Give examples how relative humidity depends on temperature?

Back 25

In warmer temperature, air holds more moisture.

In really cold days, the air hold less moisture.

Relative humidity depend on termperature.

Front 26

When it is warm out, is the air pressure high or low?

Back 26

Low

Front 27

When it is cold and dry, is the air pressure high or low?

Back 27

High

Front 28

How is air temperature measured?

Back 28

Using a thermometer.

Either Fahrenheit or Celcius.

Front 29

What are the three ways heat energy is spread throughout the atmosphere?

Back 29

Convection
Conduction
Radiation

Front 30

Define the following words?
Convection
Conduction
Radiation

Back 30

Convection- currents of air
Radiation- through space, sunlight.
Conduction- spread through solids.

Front 31

How does a thermometer work?

Back 31

.

Front 32

What is an Anememeter?

Back 32

An anemometer measure the speed of the wind and the itensity of wind.

Front 33

Why do winds in each hemisphere curve as they move?

Back 33

Because the spinning of the earth.

Front 34

What is the difference between humidity and relative humidity.

Back 34

Humidity is the amount of moisture in the air.

Relative humidity is the humidity relative to the temperature.

Front 35

How is relative humidity measured?

Back 35

Using a Psychrometer. Which has 2 thermometer, 1 wet and 1 dry.

Front 36

How does a Psychrometer work?

Back 36

.

Front 37

How does a rain gauge work?

Back 37

Rain falls into the bottle and then you measure the amount of rain that fell.

Front 38

3 types of clouds that bring precipitation?

Back 38

Cirrustratis
Cumuloninbus
Nimbostratus

Front 39

4 types of precipitation

Back 39

Rain, snow, sllet and hail

Front 40

How does density affect the weather?

Back 40

Density affect the weather by affecting the air pressure.

Less Density exerts less air pressure.
More Density exerts high

Front 41

What measures air pressure?

Back 41

Barometer

Front 42

What measures wind?

Back 42

Anemometer

Front 43

What measure relative humidity?

Back 43

Psychrometer

Front 44

What measures temperature?

Back 44

Thermometer

Front 45

What measure the level of rain fall?

Back 45

Rain Gauge