water

2. The boundary between cold and warm air masses is called a front.
4. an experiment
5. carbon dioxide
7. and record
9. A scientific law describes a pattern in nature.
10. a hypothesis
13. The point in Earth's interior where the energy release of an earthquake occurs is the focus.
15. List the three things necessary for photosynthesis.
17. a problem
19. A vast, underwater mountain chain is called a mid ocean ridge.
20. The stratosphere contains the highest concentration of ozone.
21. Relative humidity is a measure of the amount of water vapor that air is holding compared to the amount needed for saturation at a specific temperature.
22. slip
23. The troposphere is the layer of the atmosphere nearest to Earth's surface.
24. What process takes rock to the inside of Earth? subduction
25. Plates move apart at divergent boundaries.
27. data

1. water
2. Areas of low-pressure usually have cloudy weather.
3. Drift.
4. List the 7 steps of the scientific method in order R F D T O A D
6. List the 3 ways in which movement of two blocks of rock along a fault causes an
7. The hypothesis that continents have slowly moved to their current locations is called
8. to occur
11. Water freezes at 0 °C.
12. The thermometer is used to measure temperature.
14. a scientist has tested her hypothesis, the next step in scientific inquiry is to
16. Most of the freshwater on Earth is found in glaciers.
17. sun light
18. and record.
20. The process of liquid changing to a gas at the surface of the liquid is called evaporation.
21. The primary waves are the first to reach a seismograph after an earthquake.
22. Water evaporates from oceans and lakes and rises into Earth's atmosphere as water vapor.
23. List the 3 things that distinguish atmospheric layers.
24. conclusions
26. the hypothesis