1. CST Prep

2. Tube that connects mouth with stomach  esophagus

3. Tool used to measure wind speed  anemometer

4. The amount of matter something contains  mass

5. Process in body where food is broken down into smaller parts for energy and later disposal  digestion

6. Instrument used to measure air pressure  barometer

7. Long tube of muscle where most food is digested  Small intestine

8. Group of objects in space that move around a central star  Solar system

9. Grouping of two or more atoms joined together  molecule

10. Force that pulls everything down toward the center of the Earth  gravity

11. The smallest unit of an element that has all of the properties of that element  atom

12. State of matter that does not have a definite shape or volume  gas

13. Everything in the universe that has mass and takes up space  matter

14. Small mass of ice and dust that orbits the Sun in long, oval paths  comet

15. A huge spiraling storm, forms over warm water, and is very wide  hurricane

16. Organ system involved in circulating blood throughout the body  Circulatory system

17. Process where water vapor changes from gas to liquid  condensation

18. Large, rounded object in space that moves around a star  planet

19. Cycle in which water moves though the environment through evaporation, condensation, and precipitation.  Water cycle

20. A large sphere of burning gases; the Sun is the largest one of these in our solar system  star

21. Hot air rising; hot air is lighter than cool air  Convection currents

22. A substance that is made up of only one kind of atom  element

23. Small rocky object that moves around the sun  asteroid

24. State of matter that has a definite volume but not shape  liquid

25. Process where a liquid changes into a gas  Evaporation

26. A gas breathed out by animals  Carbon dioxide

27. Organ in the body that helps remove waste, filter blood  kidney

28. Muscle that pumps blood through blood vessels to all parts of the body  heart

29. A state of matter that has a definite shape and volume  solid

30. Breathing, inhale, exhale, process that releases energy from food  respiration

31. Natural or artificial object that orbits another object  satellite

32. Gas in air, needed by humans and animals to breathe  oxygen

33. A fierce spiraling storm that usually forms in a thunderstorm, up to 300 mph winds  tornado

34. Any form of water that falls from clouds (rain, snow, sleet, hail)  precipitation

35. The amount of space an object takes up  volume

36. Main organ of the respiratory system  lungs

37. A substance made of the atoms of two or more elements  compound

38. A combination of two or more substances that are not chemically combined  mixture

39. Earth’s only natural satellite  moon

40. Tube where water is removed from food in the digestive process (last part)  Large intestine