| A | B |
|---|
| How many planets are in the solar system? | Nine |
| What star is the center of our solar system? | The sun |
| The gravitational pull of sun and moon together affect what earth feature? | Ocean tides |
| Solar energy on earth's surface is affected by what 3 factors? | Earth's revolution, tilt, and rotation |
| What term means earth's orbit around the sun? | revolution |
| What term means earth's spin of the polar axis? | rotation |
| What term means the angle at which earth faces the sun? | tilt |
| How long is one complete revolution of earth? | A year (365 days) |
| How long is one complete rotation? | A day (24 hours) |
| When the northern hemisphere is tilted closest to the sun we have the longest day of our year (June 21), also called ___. | Summer solstice. |
| When the southern hemisphere is tilted closest to the sun, in Wisconsin we have our shortest daylight of the year, also called the ___. | Winter solstice |
| In the spring and fall days of equal light and darkness are called ______. | Equinoxes |
| Which latitude receives the most solar energy all year? | Equator |
| What are the 4 physical systems on earth? | Biosphere, lithosphere, atmosphere, hydrosphere |
| What physical system consists of living things? | Biosphere |
| What physical system consists of land? | Lithosphere |
| What living system consists of air? | Atmosphere |
| What living system consists of water? | Hydrosphere |
