Most weather takes place in the

The ozone layer is located in the

A cloud is a dense, visible mass of

Low, flat layers of clouds that often cover much of the sky and produce steady and widespread rain are

Which of the following forms of precipitation does not fall as a liquid?

Round, solid pieces of ice more than 5 millimeters in diameter fall as

A maritime tropical air mass that affects weather in the Unites States might form over

Which of the following air masses forms over land north of 50° north latitude?

What type of front forms when two unlike air masses form a boundary, but neither is moving?

A cold front forms when a cold air mass

Which of the following is a weather system with a center of low pressure?

Which of the following is a characteristic of an anticyclone?

A tropical storm with sustained winds of at least 119 kilometers per hour is called a

A small, intense storm formed when a vertical cylinder of rotating air develops is a

The symbol for Front C in Figure 24-1 represents a(n)

Lines on a weather map that connect points that have the same air temperature are called

A description of the pattern of weather over many years is a region’s

Which of the following factors affect a region’s temperature?

An example of a long-term climate change that occurs naturally is

Which of the following climate changes are thought to be affected by human activities?

Completion - Fill in the Blank
Complete each statement using a word from the word bank below. Some words may be used more than once or not at all. (3 points each)

anticyclone            Doppler radar            front            moisture            temperature
cyclone            El Nino                  hurricane            precipitation            thunderstorm

Rain, sleet, and snow are types of ____________________.

The size and shape of snowflakes depends on the ____________________ at which they form.

Air masses that form over water tend to have more ____________________ in them than air masses that form over land.

The sharply defined boundary that forms where two unlike air masses meet is called a(an) ____________________.

Air spirals in toward the center of a cyclone but flows away from the center of a(an) ____________________.

A major type of storm associated with lightning, strong winds, and heavy rain or hail is called a(an) ____________________.

____________________ works by bouncing radio waves off particles of precipitation in moving storms and then measuring the frequency of the waves that return.

The two main factors that determine a region’s climate are ____________________ and ____________________.

____________________ is a short-term variation in climate that is caused by a change in the normal direction of winds, which causes ocean currents to shift direction.

Why do solid particles such as dust and/or salt need to be present for clouds to form? (5 points)

What is the difference between sleet and freezing rain? (5 points)

What is the name of each type of front represented by the symbols in Figure 24-1? (8 points)

Front A:____________________________ Front B:____________________________

Front C:____________________________ Front D:____________________________

What causes clouds to form in the three fronts in Figure 24-2? 
Briefly explain your answer.     (15 points: 5 points for each front)