Heating Earth

2. the layer of gases surrounding Earth.
4. all the water on Earth, including oceans, rivers, lakes, and glaciers.
7. the circular movement in fluids caused by uneven heating, where warmer, less dense fluid rises and cooler, denser fluid sinks.
8. to soak up or take in energy, such as when a material takes in sunlight.
9. any factor or condition that can change in an experiment and may affect the results.
10. the process by which energy travels through space in the form of waves.
11. heating the phenomenon where different surfaces heat up at different rates, affecting temperature.
13. energy from the sun that provides heat and light.
14. a device or material that captures and absorbs solar energy for heating purposes.
15. the transfer of heat between materials that are in direct contact with each other.

1. the solid part of Earth, including rocks, land, sand, and gravel.
3. an investigation designed to test a hypothesis or find out how variables affect outcomes.
5. materials that prevent heat from passing in or out, helping maintain temperature.
6. the movement of energy from one object or material to another, causing changes in temperature.
12. to bounce off, as light does when it strikes a surface and does not get absorbed.