Study the Water Cycle A - evaporation B - condensation C - precipitation D - collection
When the sun heats up water in rivers or lakes or the ocean and turns it into vapor or steam
Water vapor in the air gets cold and changes back into liquid, forming clouds.
_______occurs when so much water has condensed that the air cannot hold it anymore.
When water falls back to earth as precipitation, it may fall back in the oceans, lakes or rivers or it may end up on land.
Water boils at _____ degrees Fahrenheit, or ____ degrees Celsius.
Fog is a type of cloud. (true or false)
What information is useful for scientists who study weather?
temperature, humidity, wind and air pressure
What effect does the sun have on the Earth?
It heats the Earth and causes evaporation.
Name different types of precipitation.
Rain and drizzle are the liquid types; the freezing types are snow, sleet, freezing rain, and hail.
How are the different types of precipitation formed?
After water vapor condenses forming ice crystals and water droplets, it can take on a variety of forms as it falls to the Earth as precipitation.
_____ is by far the most common type of precipitation in our atmosphere.
The two forms of rain are _____ and _____.
showers ; drizzles
_____ forms when water vapor turns directly into ice without ever passing through a liquid state.
Snow can take the form of ______ or _______.
ice pellets ; snow flakes
_______refers to a mixture of snow and rain as well as raindrops that freeze on their way down.
Freezing rain, which is sometimes referred to as _____, takes place when water droplets become super-chilled. They do not freeze in air, but rather freeze the instant they strike an object, such as a road or car.
_____ is formed when ice crystals grow into stones and become so large that they are too heavy for the wind to carry, causing them to fall towards the Earth.
A ________ measures the air temperature.
A ________ measures air pressure.
A _____________ measures relative humidity, using the cooling effect of evaporation.
A _____ ______ measures the amount of rain that has fallen over a specific time period.
A _____ ______ is an instrument that determines the direction from which the wind is blowing.
An ________ measures wind speed. The cups catch the wind, turning a dial attached to the instrument. The dial shows the wind speed.
A ________ measures the water vapor content of air or the humidity.
A _______ _________measures weather conditions higher up in the atmosphere.
A _______ is a navigational instrument for finding directions.
________ _________ are used to photograph and track large-scale air movements. Then meteorologists compile and analyze the data with the help of computers.
The average weather conditions in an area over a long period of time
The conditions of the atmosphere at a certain place and time
What are examples of weather?
humidity, clouds, and preciptation
Water freezes when the temperature falls below ____ degree Fahrenheit, or ____ degrees Celsius.
What are 3 factors that affect climate?
The amount of sunlight, oceans and other bodies of water, and altitude.
Name the 3 climate zones.
tropical, polar and temperate
Name the climate zone that is hot and rainy, just north and south of the equator.
tropical climate zone
Name the climate zone that has very cold temperatures all year.
polar climate zone
Name the climate zone that has warm, dry summers and cold, wet winters.
temperate climate zone
Why would scientists use ice core samples?
Scientists can use core samples to find out what the atmosphere was like in the past. Each core sample layer has dust, gases and other materials to help scientists' research.
A _______ is a large collection of very tiny droplets of water or ice crystals.
Why do clouds float?
A cloud is made up of liquid water droplets. A cloud forms when air is heated by the sun. As it rises, it slowly cools it reaches the saturation point and water condenses, forming a cloud. As long as the cloud and the air that its made of is warmer than the outside air around it, it floats!
Study the graphic of cloud types.
Study the chart of cloud types
_____ is a cloud on the ground. It is composed of billions of tiny water droplets floating in the air.
Match each weather instrument picture to its name.
What is the name of a scientist who studies weather?