water cycle and weather Quiz 6th

It's a hot summer day and you're outside, hanging with your friends. You can't see it, but the temperature causes water in puddles, ponds, lakes, oceans and the ground to turn into water vapor and rise into the sky. This conversion of liquid water into a gas, called water vapor, is evaporation. The warm water vapor rises high into the atmosphere. Up there, the air is much colder. As the water vapor cools, heat energy is released. The cold air turns the water vapor back into tiny droplets of liquid water, much smaller than raindrops. This conversion of gas (water vapor) into liquid (water) is called condensation. The cooled water droplets form clouds. Warm, rising air currents bring more and more water vapor skyward, while keeping the tiny water drops that make up the cloud from falling to the ground. Eventually, the mass of the clouds becomes too large for the rising air to hold, so gravity wins the battle: Large drops of rain pour from the cloud and fall to Earth below, in a process called precipitation. What is the process by which water vapor cools into tiny water droplets called?

• precipitation
• condensation
• conversion
• evaporation

All weather takes place in the atmosphere, mostly in its very lowest layer. Weather is the condition of the atmosphere in one place for a short period of time. To describe the weather, we look at the general conditions of the sky overhead. Is it clear, cloudy or filled with rain? We also measure six qualities of the atmosphere: precipitation, pressure, humidity, temperature, wind and air quality. Pressure is the force of the air pushing down upon the Earth. Air pressure is measured with a tool called a barometer, so it is also known as barometric pressure. Low pressure usually brings precipitation, while high pressure often brings dry weather. Humidity is the amount of water vapor in the air compared to how much water vapor the air can hold. Temperature is a measure of heat energy. If the temperature is high, there is more energy and we feel warm. If it's low, there's less energy, so we feel cold. Wind is the direction and speed of the air moving around us. The air quality depends on the place from which it moves: it might be humid, cold, or polluted air. If you hear a weather report say that a low pressure system is coming in, what kind of weather can you expect?

• wind
• polluted air
• precipitation
• heat

In order from bottom to top, the layers of the atmosphere are

• troposphere, stratosphere, mesosphere, thermosphere.
• thermosphere, mesosphere, troposphere, stratosphere.
• stratosphere, troposphere, mesosphere, thermosphere.
• mesosphere, stratosphere, thermosphere, troposphere.

Climate is the normal weather for a given place over a long period of time. Climates are based on the kinds of air masses usually found there. Which of these is a description of a climate?

• a heavy snowstorm
• a cold air mass
• mild summers and warm winters
• partly cloudy with a chance of rain

What is the order of the events for the water cycle on a typical warm day?

• rain, snow, sleet
• precipitation, evaporation, rain
• evaporation, condensation, precipitation
• condensation, evaporation, precipitation

Water located in wells underground is

• run-off.
• precipitation.
• ground water.
• condensation.

The lowest level of the atmosphere is the

• lithosphere.
• troposphere.
• stratosphere.
• hydrosphere.

A large body of air that has similar pressure, temperature and atmospheric conditions is called a(n)

• air mass.
• jet stream.
• precipitation.
• weather front.

The leading edge where one weather system meets another is called a(n)

• air mass.
• jet stream.
• anticyclone.
• weather front.

What happens during a cold front?

• Cold air moves quickly pushing the warmer air up causing stormy weather
• warm air gently rises above cold air causing rainy weather
• Both warm and cold air masses stay in place
• Warm air gets trapped between two cold air masses