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Across 3. ________ rays have the shortest wavelengths, the highest frequencies and the greatest amount of energy; they can be used to to kill cancer cells inside the body (Fact 214) 4. _________ is the study of how living things interact with their environment (Fact 141) 5. fermentation is the process that provides energy for cells but does not require ______ (Fact 168) 8. the electromagnetic ________ is the complete range of of electromagnetic waves placed in order of increasing frequency (Fact 210) 9. Physical science is the study of matter and _________ (Fact 215) 12. every form of matter has two types of properties (____________), physical properties and chemical properties (Fact 222( 13. _______ is the amount of matter in an object (Fact 220) 14. _________ are made of genes joined together (Fact 182) 17. x-rays can penetrate most matter except _______; too much exposure to x-rays can cause cancer (Fact 213) 20. ___________ are factors that control traits (Fact 176) 21. a _____ _______ sunlight from reacihng the moon; the shadow of the Earth falls on the moon (Fact 47) occurswhen the Earth moves in between the sun and the moon and blocks 22. __________ are groups of specialized cells that perform the same function (Fact 191)

Down 1. ________ _____ is the idea that organisms that are better adapted to their environment are more likely to survive and reproduce than other members of the same species (Fact 186) 2. a _______ _________ occurs when the moon moves in between the Earth and the sun and blocks sunlight from reaching the Earth; the shadow of the moon falls on the Earth (Fact 49) 5. _________are structures composed of different types of tissue that do specific jobs in the body (Fact 192) 6. ___________ is the study of matter, energy, motion, and forces (Fact 219) 7. __________ is the study of the properties and interactions of matter (Fact 218) 10. _________ is the process by which cells obtain energy from sugar (Fact 167) 11. __________ is the process by which plants use energy from the sun to make food (Fact 165) 15. ________ is anything that has mass and volume (Fact 216) 16. ________ are different forms of genes (Fact 177) 18. ________ is the study of the physical structure of the Earth, its history, and the forces that shape it (Fact 79) 19. _________ is the amount of space a substance occupies (Fact 221)