| A | B |
|---|
| Efficiency of Machines = | input work divided by output work |
| Earth's magnetic field stems | from the liquid outer core of molten iron |
| Earth's magnetic poles | change position |
| Fourth planet from the Sun | Mars |
| Terrestrial Planets | Mercury Venus Earth Mars |
| Phobos & Deimos | moons of Mars |
| It has mass and takes up space | matter |
| Atomic number 80 | Mercury |
| Has the greatest temp. range of any planet | Mercury |
| Metabolism requires | glucose and oxygen |
| Schist and Gneiss are | metamorphic rocks |
| A meteor is called a | falling star |
| A meteorite | survives the fall to Earth |
| Pasteurization of milk | heat to 63 deg. C. for not less than 30 min. |
| Home to about 400 billion stars | Milky Way Galaxy |
| Stanley Miller & Harold Urey | classic experiment on the origin of life |
| Four most common minerals | Quartz Feldspar Mica Olivine |
