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Barnett 6th grade 18
Barnett - 6th grade science - Chapter 18 vocabulary
| Question | Answer |
|---|---|
| astronomy | The study of the moon, stars and other objects in space. |
| axis | The imaginary line that passes through earth’s center and the North and South poles. |
| rotation | Object spinning on its axis. Causes day and night |
| revolution | The movement of one object around the sun. Causes a year. |
| orbit | Earth’s path as it revolves around the sun. |
| latitude | A measurement of distance from the equator -- expressed in degrees north or south of the equator |
| solstice | The two days each year when the noon sun is at either 23.5 degrees south or north -- axis is either pointed directly toward or directly away! |
| equinox | The two days each year when the sun is directly overhead at the equator – means “equal night” -- Not pointed directly toward or away. |
| vernal equinox | Spring equinox that occurs around March 21, and marks the first day of spring in the Northern Hemisphere |
| autumnal equinox | Occurs around September 23 and marks the first day of fall in the Northern Hemisphere |
| phase | The different shapes of the moon that depend on how much of the sunlight side of the Moon is facing Earth |
| eclipse | when the moon’s shadow hits earth or Earth’s shadow hits the moon. When an object in space comes between the sun and a third object, and casts a shadow on that object |
| solar eclipse | When the moon passes between the earth and the sun, blocking the sunlight from reaching Earth. |
| umbra | Darkest part of the shadow – this is there the sun is totally blocked |
| penumbra | Lighter part of the shadow – only part of the suns rays are blocked |
| lunar eclipse | Occurs at a full moon when the Earth is directly in line between the moon and the sun |
| tide | The rise and fall of ocean water due to the differences in the moon’s gravitational pull on the earth – change every 12.5 hours or so |
| gravity | The force that pulls the moon and earth (including the water on the Earth’s surface) toward each other |
| satellite | Any natural or artificial object that revolves around another object in space |
| geosynchronous orbit | An orbit where the object revolves at the same rate that earth rotates. This means that the object seems to hover over one spot |
| telescope | Tool that makes objects that are very far away appear closer than they are. Changed the science of Astronomy! |
| crater | Round pits on the surface of the moon |
| maria | Dark, flat that are dry and were once flooded with molten material. |
Created by:
ebarnett
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