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Across 3. _____ is the amount of matter in an object or a substance (Fact 63) 6. particles in a liquid are loosely connected, are able to _____ past each other, and move fast enough to break some of the attractions between them (Fact 220) 8. the SI unit of weight is the _______ (Fact 68) 9. condensation, freezing and *deposition are ________ changes of state. During these changes of state, the substance releases heat energy and particle motion decreases (Fact 238) 11. All of the ______ _____ (the outer planets) Jupiter, Saturn, Uranus, and Neptune are surrounded by rings and moons. (Fact 154) (2 Words) 14. the formula used to calculate _______ ______ is distance divided by time (Fact 77) (2 Words) 19. ________ are observations made with tools (Fact 17) 20. the formula for finding _______ is mass divided by volume (Fact 183) 21. ______ is when a gas changes to a liquid (Fact 236) 23. when the ______ of one celestial body falls on another, an eclipse occurs (Fact 166) 24. _____ is the sixth planet from the sun, is the second largest planet, is the least dense planet, and has the largest rings of all the gas giants 26. a _______ change affects one or more physical properties of a substance. A substance that undergoes this type of change is still the same substance (Fact 212) 27. _______ is the type of vaporization that occurs throughout a liquid and at its boiling point (Fact 233)

Down 1. particles in a _____ can move close together or far apart, move independently of each other, collide often and move fast enough to completely break the attractions between them.(Fact 223) 2. _______ is the amount of space something occupies (Fact 51) 3. the SI base unit used to express the volume of a solid is the cubic _____. The cubic centimeter is the unit used to express the volume of smaller solids. (Fact 54) 4. ______ is when a solid changes directly to a gas without passing through its liquid state first (Fact 234) 5. ______ is the planet farthest from the sun and is known as the Blue planet (Fact 159) 7. Melting, vaporization and sublimation are _______ changes of state. During these changes, the substances absorbs heat energy and particle motion increases (Fact 235) 10. mass can be measured with an instrument called a _______ (Fact 64) 12. during a change of state, a substance either absorbs or releases heat or ____ _____ (Fact 229) (2 Words) 13. _____ is when a gas changes directly to a solid without passing through the liquid state first (free) 15. a ______ change is a change that occurs when one or more substances is changed into new substances with different properties (characteristics) (Fact 213) 16. ______ is the type of vaporization that occurs only on the surface of a liquid and below the liquid's boiling point (Fact 232) 17. particles in a _____ are closely packed together, vibrate in place and are strongly attracted to each other (Fact 217) 18. vaporization is when a ______ changes to a gas (Fact 231) 22. for an object to float, the upward acting buoyant force most equal the downward force of ______ (Fact 198) 25. the SI unit of mass is the ______ (Fact 65)