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Science Unit 1
Astronomy
| Term | Definition |
|---|---|
| Systems | a group of parts that work together as a unit |
| Pattern | something that happens in a regular and repeated way |
| Model | a representation of an object or what something looks like |
| Solar System | a group of objects (a system) in space that move around a central star |
| Star | a huge, burning sphere of gases; for example, the Sun |
| Planet | a large object that moves around a star |
| Astronomer | a person who studies stars, planets, and other objects in the sky |
| Telescope | an instrument people use to observe distant objects with their eyes |
| Rotation | the spinning of a planet on its axis |
| Axis | an imaginary line that runs through both poles of a planet |
| Revolution | the action of one object moving around another in an orbital path |
| Orbit | the path an object, such as a planet, takes as it revolves around a second object |
| Ellipse | the shape of the Earth's orbit around the Sun |
| Seasons | caused by the different hemispheres of the Earth being tilted toward or away from the Sun |
| Shadow | a dark area where light is blocked |
| Lunar Eclipse | occurs when the Moon passes through the Earth’s shadow during a full Moon |
| Solar Eclipse | occurs when Earth passes through the Moon’s shadow during a new Moon |
| Lunar Cycle | the period of time it takes for the Moon to complete one full revolution around Earth |
| Phases | the different shapes the Moon appears to have in the sky when observed from Earth |
| Tide | repeated rise and fall in the level of the ocean |
Created by:
Mrs_Barrett
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