Clue 2

2. an illusion often seen in deserts or hot roads where it looks like there is water but there isn’t
7. the force that pulls objects toward the earth keeping people and things from floating away
8. the preserved remains or traces of ancient plants or animals found in rocks over millions of years
9. the path an object like a planet or moon follows as it moves around another object in space
10. a large mass of snow ice or rocks that suddenly falls down a mountain with great force
13. an object made by people long ago that helps scientists learn about history and ancient civilizations
14. the study or practice of flying aircraft including airplanes helicopters and other flying vehicles
15. a machine sent into space to orbit the earth and send information for communication weather and research
17. a violent storm with strong winds that spin in circles often causing heavy rain and flooding
19. a substance in food that helps the body grow stay healthy and have energy like vitamins and minerals

1. the line where the sky seems to meet the land or ocean often seen at sunrise or sunset
3. a gas in the air that people animals and plants need to breathe and stay alive
4. the speed and direction an object is moving often used in science physics and sports
5. something unknown or difficult to explain that makes people curious and eager to find the answer
6. a glass tank or building where fish and other water animals live and can be observed by people
11. a tool with a needle that always points north helping people find directions when traveling
12. the design and construction of buildings bridges and other structures using creativity and engineering
13. the height of something above the ground or sea level often used when talking about airplanes or mountains
16. a small icy object that orbits the sun and sometimes has a glowing tail when it gets close
18. the money used in a country including coins and paper bills for buying and selling things