1. 180 170 160 150 140130120 110100 90 80 7060504030 20 1098765432 1 0 Seconds left: The Sun warms the Earth, which warms the air around it, causing the air to move. Large masses of air can move and collide, creating a front. A front is the boundary between two different air masses where certain kinds of weather can occur. – Describe the types of air masses that are colliding at a cold front.

2. With a cold front, a large cool air mass will move into an area and collide with a warm, moist air mass. The warm air will move over the cold air mass, and the moisture in the warm air cools and condenses, forming clouds.

3. 180 170 160 150 140130120 110100 90 80 7060504030 20 1098765432 1 0 Seconds Left: Describe the difference between “good” ozone and “bad” ozone.

4. “Good” ozone is found in the stratosphere and protects the Earth from harmful UV rays. “Bad” ozone is found near the surface of the Earth and causes respiratory problems and can damage plastics and other materials.

5. 180 170 160 150 140130120 110100 90 80 7060504030 20 1098765432 1 0 Seconds Left: List & describe the three types of heat transfer

6. Radiation - A way in which energy is transferred from place to place in the form of a wave. –Process by which energy travels across space. Convection - The movement heat by currents in liquids or gases. –The process of heat transfer through fluids by means of rising currents. Conduction - The transfer of heat energy through a substance or from one substance to another by direct contact of atoms or molecules. –The process of heat transfer through materials and adjoining substances.

7. 180 170 160 150 140130120 110100 90 80 7060504030 20 1098765432 1 0 Seconds Left: How does the Sun transfer energy to the Earth?

8. The Sun transfers energy (heat & light) to the Earth by radiation.

9. 180 170 160 150 140130120 110100 90 80 7060504030 20 1098765432 1 0 Seconds Left: Draw a diagram of the water cycle – include precipitation, evaporation, condensation, percolation (infiltration )

11. 180 170 160 150 140130120 110100 90 80 7060504030 20 1098765432 1 0 Seconds Left: What helps control how much of the Sun’s radiation is absorbed by the Earth?

12. The atmosphere

13. 180 170 160 150 140130120 110100 90 80 7060504030 20 1098765432 1 0 Seconds Left: A group of students measured the amount of rainfall received in two Texas counties over the course of six months in 2001. Their data is listed in the table below. Create a bar graph to represent the data, making sure to: – Graph the data correctly – Use an appropriate scale for the graph – Label the vertical and horizontal axes – Give the graph a title

14. The bar graph should show two bars for each of the six months. One bar represents the data for each county. The measurements are between 0 and 6 inches, so a sample scale would indicate that each increment on the graph represents 0.2 inches. Accept reasonable scales. Shading or labels should be used to identify the county of each bar. Inches of rainfall should be labeled for the vertical axis. A sample title might be "Rainfall Amounts in Texas During 2001."

15. 180 170 160 150 140130120 110100 90 80 7060504030 20 1098765432 1 0 Seconds Remaining: Draw a diagram illustrating convection.

17. 180 170 160 150 140130120 110100 90 80 7060504030 20 1098765432 1 0 Seconds Left: Illustrate with a diagram the way heat moves.

19. 180 170 160 150 140130120 110100 90 80 7060504030 20 1098765432 1 0 Seconds Left: Why can more water vapor be present in warm than in cold air ?

20. At warmer temperatures, water vapor molecules move too quickly to condense into rain or snow.

21. 180 170 160 150 140130120 110100 90 80 7060504030 20 1098765432 1 0 Seconds Left: Trace the path of a drop of water as it moves through the entire water cycle. Begin your cycle with water in a liquid state in the ocean and be sure to include: – the names of the stages of the water cycle – the role of the energy from the sun – the changes in the water's state as it moves through the cycle

22. Beginning in the ocean, solar energy heats the surface water of the ocean and changes water from a liquid to a gas or vapor. This process is called evaporation. Once it is in the atmosphere, the water vapor cools and condenses, which is the next step of the water cycle, called condensation. The water vapor condenses back into liquid water where it collects and falls back to the Earth. This water that falls from the atmosphere is called precipitation, which is the next step of the water cycle. Once it lands on the Earth's surface, it can flow on the surface as runoff, or it can collect in a body of water or underground in an aquifer. Once it seeps underground or is collected in a body of water, plants and trees can soak up some of the water. Through the process of transpiration, plants evaporate moisture back into the atmosphere. Water vapor can return to the atmosphere from plants and animals as well as from evaporation from bodies of water. Once the water is back into the atmosphere, the cycle starts all over again.

23. 180 170 160 150 140130120 110100 90 80 7060504030 20 1098765432 1 0 Seconds Left: The Sun warms the Earth, which warms the air around it, causing the air to move. Large masses of air can move and collide, creating a front. A front is the boundary between two different air masses where certain kinds of weather can occur. – Describe the types of air masses that are colliding at a cold front.

24. With a cold front, a large cool air mass will move into an area and collide with a warm, moist air mass. The warm air will move over the cold air mass, and the moisture in the warm air cools and condenses, forming clouds.