Unit 4 Weather

1
Unit 4Weather

• Lesson 2
• How Do the Oceans and the Water Cycle Affect
  Weather?

2
The Oceans Affect Weather

• In the summertime, the sun absorbs the heat in
  the oceans. This results in the air above the
  oceans to be cooler.

3
The Oceans Affect Weather

• In the winter months, the oceans release heat
  into the air above them. This causes the air to
  be warmer.

4
Warm Water Currents

• Uneven heating in various parts of the ocean
  results in currents. Warm currents flow like
  rivers in the oceans. Two warm currents include
  The Gulf Stream Current and the North Atlantic
  Current. These warm currents causes the weather
  in these places to be warmer.

5
Cold Water Currents

• There are also cold water currents such as the
  California Current. This current creates cooler
  weather along Californias Coast.

6
El Nino

• Currents can also be deep in the ocean. These
  currents carry cooler water. When warm air on
  the oceans surface is not blown away by winds,
  the these cooler currents cannot reach the
  surface. This results in El Nino. El Nino
  changes weather patterns over the Pacific Ocean
  causing heavy rains in some areas and little
  rainfall in others.
• http//www.youtube.com/watch?vSR5VPAqVQBw

7
Weather Patterns the Water Cycle

• Global winds carry warm vapor from the tropics to
  cooler regions. There, heat is released to the
  atmosphere as the water vapor condenses.

8
Clouds

• Clouds form where there is high humidity.
• Clouds are made of dust and condensed water.
• Water formed in clouds returns to Earth as
  precipitation.
• There are three types of clouds cumulus,
  stratus, and cirrus.

9
Cumulus Clouds

• These clouds are puffy and indicate fair weather,
  but as a cumulus cloud grows, rain can develop.

10
Stratus Clouds

• Stratus clouds form low in the atmosphere. They
  usually cover the sky. It is possible for
  moderate rainfall or snowfall to fall from
  stratus clouds.

11
Cirrus Clouds

• Cirrus clouds form high in the troposphere, where
  the air is very cold. They are made mostly of
  ice crystals.

12
Precipitation

• Light drizzle falls from stratus clouds.
• Rain and other forms of precipitation fall from
  cumulonimbus clouds.
• Solid forms of precipitation are snow, sleet, and
  hail.

13
Snow

• Snow is formed when water vapor turns directly
  into ice crystals.

14
Sleet Hail

• Sleet hail is formed when liquid water passes
  through cold air and becomes frozen.

15
Other Forms of Condensed Water Vapor

• Dew

• Frost

• Fog

16
Ocean Current Videos

• Ocean Currents Bill Nye the Science Guy
• http//www.youtube.com/watch?vw_8mw-1HYFgfeature
  related
• Deep Ocean Currents music video
• http//www.youtube.com/watch?v4_wLatK7sXgfeature
  related