Thursday, February 17, 2011
What causes weather?
Weather is the physical condition of the atmosphere at a particular time. It includes temperature, air pressure and water content.
Weather is produced when air moves from plece to place. This moving air is known as wind. Winds are caused by warm air rising and cooler air mooving to replace it. Warm air is usually less dense then cooler air; therefore, it creates low air pressure. Cool air is more dense and creates high air pressure.
Usually we have fine the weather when the air pressure is high, and we will have clouds, rain or snow when air pressure drops.
1. What is the purpose ot the text?
a. To retell abou weather
b. To explain the process of the information of weather
c. To describe the steps of the information of weather
d. To describe about weather
e. To persuade people about the information of weather
2. When do we find good weather?a. When air moves from place to place
b. When there is moving air
c. When warm air is less dense than cool air
d. Ahen air pressure drops
e. When the air pressure is high
3. The following statements are true except...
a. A physical condition of the atmosphere at a particular time is called weather.
b. Air movement from place to place causes weather.
c. The moving air is called wind.
d. Warm air is usually more dense than cool air.
e. When air pressure drops we usually have clouds.
4. “Cool air is more dense and creates high air pressure.” The synonym of the underline word is...