Across
- 7. a plate boundary where tectonic plates move away from each other can result in seafloor spreading, earthquakes, mid ocean ridges, rift valleys, and ocean basins
- 8. A single celled organism
- 9. have some properties of both metals and nonmetals semiconductors
- 12. change in appearance; nothing new is formed ex: ice melting, kool aid, tearing paper
- 13. A chemical substance that is present at the start of a chemical reaction
- 14. the number of protons and neutrons
- 17. the number of protons in an atom of one element
- 18. to move around the sun takes 365 days for the earth to go around the sun (a year)
- 19. Place where an organism lives
- 22. columns on the periodic table same number of valence electrons similar properties and reactivity
Down
- 1. Moon phase that occurs when the Moon is between Earth and the Sun, at which point the Moon cannot be seen because its lighted half is facing the Sun and its dark side faces Earth.
- 2. speed with direction
- 3. A substance made of two or more elements chemically bonded ex: NH3
- 4. forces acting on an object that combine and form a net force of zero
- 5. a plate boundary where tectonic plates slide past each other can result in earthquakes and fault lines
- 6. A severe storm that develops over tropical oceans and whose strong winds of more than 120 km/h spiral in toward the intensely low-pressure storm center
- 7. = Mass / Volume
- 10. moon phase that comes after a first quarter moon and before a full moon; more than half of the moon is lit up on the right side, but it isn't completely full
- 11. A collection of stars, dust, and gas held together by gravity
- 15. change in velocity speeding up, slowing down, changing direction
- 16. A large cloud of gas and dust where stars are born
- 20. Living parts of an ecosystem
- 21. An organism that lives on or in a host and causes harm to the host