Weather Review

Weather Review

Earth's Atmosphere

• Earth is wrapped in a layer of gases called the atmosphere.

• The atmosphere helps make the Earth suitable for living things and is divided into layers.

Layers of the Atmosphere: Troposphere

• The Troposphere is the layer closest to the ground.

• It contains almost all of Earth's carbon dioxide, water vapor, air pollution, clouds, and organisms.

• All of Earth's weather takes place in the troposphere.

Multiple Choice

The troposphere is the layer of the atmosphere that is __________________ to the earth.

• closest

• farthest

Layers of the Atmosphere: Stratosphere

• Above the troposphere is the stratosphere.

• The ozone layer is located in the stratosphere. Oxone is a form of oxygen gas that helps protect the Earth from the Sun's UV rays.

Layers of the Atmosphere: Mesosphere

• The middle layer of the atmosphere is the mesosphere.

• Meteoroids falling to the Earth burn up in this layer.

Multiple Choice

Which layer of the atmosphere is where the ozone layer is located?

• troposphere

• mesosphere

• stratosphere

Multiple Choice

In which layer of the atmosphere do meteors burn up?

• thermosphere

• mesosphere

• stratosphere

Layers of the Atmosphere: Thermosphere

• Beyond the mesosphere is the thermosphere.

• The Space Shuttle and Satelites orbit Earth in this layer.

Layers of the Atmosphere: Exosphere

• The outermost part of the atmosphere is the exosphere. Some satellites orbit in this layer as well.

Multiple Choice

Which layer is closest to the mesosphere?

• thermosphere

• exosphere

Multiple Choice

Which layer is farthest from Earth

• thermosphere

• troposphere

• mesosphere

• exosphere

The Water Cycle

• The water cycle is a never-ending movement of water between Earth's surface and the atmosphere. The cycle has no start and no end. It goes on without stopping every second of every day.

Evaporation

• Heat energy from the sun causes water on Earth's surface to change from a liquid to a gas. This gas is called water vapor.

• The process that changes gas to a liquid is called evaporation.

Transpiration

• Transpiration is a process in which plants release wator vapor, mainly through their leaves.

Condensation

• The next step in the water cycle is called condensation.

• Condensation is the process in which water vapor condenses when it cools.

• Condensation turns the water vapor into water droplets.

Multiple Choice

Evaporation is the process in which ________________.

• plants release water vapor into the air.

• the change from liquid to a gas.

Precipitation

• After water condenses in the atmosphere, it falls to Earth as precipitation.

• Forms of precipitation include: rain, snow, freezing rain, sleet, and hail.

Runoff

• When water falls to the ground, the water may flow over land and collect in rivers, streams , ponds, and lakes.

• This happens when the ground cannot absorb water, or the water is falling too fast to soak into the ground.

Multiple Choice

In which phase does water fall back to the Earth?

• Condensation

• Precipitation

• Runoff

Clouds

• Clouds form due to the process of condensation.

• They are made of water droplets or ice particles and bits of dust that stick together as the water vapor cools and condenses.

Types of Clouds

• Stratus clouds are low lying clouds that cover a wide area.

• Stratus clouds may look "blanket - like"

Cumulus Clouds

are puffy white clouds with flat bottoms that form at low or medium elevations. You see these during fair weather.

When these clouds are darker, they may signal rain or a thunderstorm.

Cirrus Clouds

These clouds for at high elevations. They appear as thin, wispy clouds and signal fair weather.

Multiple Choice

____________clouds may signal fair weather when white or rainy weather when dark

• stratus

• cumulus

• cirrus

Multiple Choice

_______________ are "blanket - like" clouds that cover a large area.

• stratus

• cumulus

• cirrus