Changing Views of Earth

3. The layers of gases surrounding Earth or another planet.
4. A scientist who studies the weather and makes forecasts.
9. The height of something above sea level or the Earth's surface.
11. A new idea, method, or device that improves something.
13. The science of designing and flying aircraft.
15. A tool used to measure air pressure, which helps predict the weather.
16. A human-made object that orbits a planet and collects data.
17. A very powerful computer that can process large amounts of data quickly.
18. A prediction about what the weather will be like in the future.
20. A tool used to measure temperature.

1. The parts or materials that make up something.
2. The correct model of the solar system where the Earth and other planets orbit the Sun.
5. To carefully examine something in order to judge its value or importance.
6. Standards or rules used to make a judgment or decision.
7. To go on a journey, especially one that is risky or unknown.
8. The outdated belief that the Earth is the center of the universe and everything orbits around it.
10. The usual weather conditions in a place over a long period of time.
12. The path an object takes as it moves around another object in space.
14. Related to the sky or outer space.
19. A scientific idea that explains something based on evidence and research.