moisture in the atmosphere

1.Humidity (definition)

amount of water Vapour in the air (moisture in the atmosphere)

2.Forms of water in the atmosphere

Water Vapour, Liquid 'rain/clouds', Ice

3.(Forms of water in the atmosphere) Water Vapour

Water in gas state, occurs the most often in the atmosphere

4.(Forms of water in the atmosphere) Water Vapour quantity

Changes from place to place/season to season. Warm air can hold more water Vapour than cold air (summer > winter)

5.(Forms of water in the atmosphere) Water Vapour in warmer air

Warmer air has more kinetic energy allowing molecules to stay in a gaseous state rather than condensing into liquid. (molecules are further apart

6.(Forms of water in the atmosphere) Liquid rain/clouds

Liquid water is found in the atmosphere when air temperatures cool sufficiently for the water Vapour (gas) to condense and form water droplets

7.(Forms of water in the atmosphere) Liquid rain/clouds :Water droplets

are small and light so they remain suspended in the air, when they join they get heavier and fall to the earth as rain

8.(Forms of water in the atmosphere) Ice

if the temperature of the air falls below 0°C the liquid will freeze and turn to hail

9.(Forms of water in the atmosphere) Ice - Snow

Water Vapour sublimates (from gas to ice) and changes directly to snow

10.(Forms of water in the atmosphere) Frozen Precipitation types

Hail, Graupel, Sleet, Snow

11.Frozen Precipitation types Hail

Ball of ice, often forms in thunder storms

12.Frozen Precipitation types Graupel

Snowflakes that collect supercooled water droplets on the outer surface

13.Frozen Precipitation types Sleet

Liquid Precipitation that freezes before it reaches the ground

14.Frozen Precipitation types Snow

Water Vapour turns to ice without going through the liquid stage

15.Water cycle importance

Helps with water supply and keeps our plants growing

16.Water Cycle (RCCCR)

Rises, Cooling, Condensation, Clouds, Rain

17.(Water cycle) Air rises

Sun provides energy and heats up water - turns to water Vapour (gas), gas is lighter than the liquid so it rises into the sky. (Evaporation)

18.(Water cycle) Evaporation

The process of turning water to gas

19.(Water cycle) Cooling

As water Vapour rises it moves away from the surface and gets cooler as there is no source of heat. This cools our atmosphere

20.(Water cycle) Condensation

As the water Vapour rises and gets cooler it changes into tiny water droplets. This releases heat back into the atmosphere.

21.Wind and clouds

Moves clouds and regulates the temperature

22.(Water cycle) Clouds

Made up of small water droplets, after Condensation occurs in the sky clouds form and grow.

23.(Water Cycle) Rain

Water droplets collide and stick together to form raindrops, when these drops are too heavy they fall from the cloud to the ground in the form of rain, snow or hail.

24.(Water Cycle) After rain

1. Most water evaporates quickly, 2. Snow or ice sits and melts, 3. water flows into streams and reservoirs, 4. Water infiltrates into the ground water level, 5. Plants absorb water

25.Location

Ocean currents influence temperature. Maritime

26.Measuring humidity

Specific humidity, Absolute humidity, Relative humidity

27.(Measuring humidity) Specific humidity

the mass of water Vapour in grams contained in a kg of dry air (used in Meteorology and tracking moisture changes)

28.(Measuring humidity) Absolute humidity

The mass of water Vapour in grams in a cubic meter of dry air (heating, ventilation, aircons)

29.(Measuring humidity) Relative humidity

The proportion of water Vapour in the air compared to the amount of water Vapour it could hold at a given temperature in percentage (Used in weather forecasts - daily life)

30.Water Vapour and temperature

The amount of water Vapour in the air depends on the temperature of the air

31.Saturated air

When the air is holding as much water Vapour as it can at that temperature it is considered saturated (high humidity often)

32.Factors that affect relative humidity

Air temperature and Water present in the air

33.(Factors that affect relative humidity) Air temperature

Warm air holds more water than cold air

34.(Factors that affect relative humidity) Water present in the air

Places near oceans or areas that experience rainy conditions may have higher levels of humidity