Study Guide
Quick meanings for every word. Pair Tier 3 words with pictures to support newcomers.
| Word | Meaning |
|---|---|
| Sun | The star at the center of our solar system, which provides Earth with light and heat. |
| Moon | Earth's natural satellite, which orbits our planet and reflects sunlight. |
| Globe | A round, three-dimensional model that represents Earth. |
| Seasons | The four yearly divisions of weather — winter, spring, summer, and fall — caused by the tilt of Earth's axis. |
| Angle of Rays | How directly sunlight strikes a part of Earth's surface. A more direct hit concentrates light and heat into a smaller area. |
| Axis | An imaginary line through the center of an object that it spins around. |
| Elliptical | Having an oval shape, like the path Earth follows around the Sun. |
| Equator | An imaginary line circling the exact middle of Earth, equally distant from the North and South Poles. |
| Hemispheres | The northern and southern halves of Earth, divided by the equator. |
| Orbit | The curved path an object follows around another object in space. |
| Revolve | To travel in a path around another object, such as Earth traveling around the Sun. |
| Revolution | One complete trip an object makes around another object. |
| Rotate | To spin around one's own axis. |
| Rotation | One complete spin an object makes around its own axis. |
| Sunlight | The light and heat energy that travels from the Sun to Earth. |
| Tilt | A lean away from a straight vertical line — Earth's axis leans about 23.5 degrees, which is why we have seasons. |