| A | B |
|---|
| Sun | contains nearly all the matter in the solar system |
| Mercury | does not have enough gravity to hold an atmosphere |
| Venus | temperature is too hot for life |
| Earth | only planet that has life |
| Mars | looks red because of rust in its soil |
| Jupiter | largest planet |
| Saturn | huge rings made of ice chunks |
| Uranus | most moons |
| Neptune | one of largest moons in the solar system |
| equinox | Earth's orbit at which hours of daylight and darkness are equal |
| solstice | Earth's orbit at which daylight hours are at their greatest or fewest |
| Summer Solstice | June 21 |
| Fall Equinox | Sept 21 |
| Spring Equinox | March 21 |
| Winter Solstice | Dec 21 |
