Convection lab

If one beaker contains 100 ml of cold water, and another contains 100 ml of hot water, which beaker contains more molecules?

As you open a refrigerator door, what happens to the air inside?

As you lift the lid from a pot of soup, do the gases that escape rise from the pot, or sink around its base? Why?

If you swim to the bottom of a pool and place a cork on the bottom, will the cork stay in place? Why or why not? Explain.

Both air and water are fluids. What will happen to an area within a fluid that becomes warmer than the surrounding fluid?

Atmospheric pressure is the pressure exerted on earth by the force of gravity pulling the air towards the earth's surface. Where air is rising from the surface, will the atmospheric pressure be increased or decreased?

1. 1. During the lab, what effect did the cups of hot water have on the density of the water directly above them?

2. 2. What happened as a result of this change?

3. A house has a glass "sun space" attached to its south side, which is just a space all around the house, next to the outside wall that holds air. Vents allow air to flow from the house into the sun space, and vice versa. Describe the direction air flow as the air in the sun space is warmed by the Sun.

4. You may have noticed convection cells in a pot of boiling macaroni. Describe the direction of water flow in the pot. The hottest part of the burner is beneath the center of the pot.

7. 7. From your knowledge of onshore and offshore breezes, explain why the wind would blow in from the sea toward the land during the afternoon.

11. What moves in to replace the rising air?

13. 13. If hotter air rises, why is air that is closer to the Earth's surface warmer than the air high above it

14. 14. Wind is considered to be a form of "solar energy". Explain why.