| 1: a figure expressing the acidity or alkalinity of a solution on a logarithmic scale on which 7 is neutral, lower values are more acid, and higher values more alkaline |
continental glaciation [__] | rock cycle [__] | DNA [__] | pH [__] |
| 2: vector quantity that tends to produce an acceleration of a body in the direction of its application |
comets [__] | forces [__] | dominant [__] | dispersal [__] |
| 3: an cycle of processes undergone by rocks in the earth's crust |
hypothesis [__] | rock cycle [__] | Law of Conservation of Matter [__] | chemical energy [__] |
| 4: physical rather than biological; not derived from living organisms |
continental drift [__] | abiotic [__] | dominant [__] | chemical energy [__] |
| 5: celestial object consisting of a nucleus of ice and dust and, when near the sun, a tail of gas and dust particles pointing away from the sun |
rock cycle [__] | comets [__] | Law of Conservation of Matter [__] | biotic [__] |