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Earth, Sun, and Moon
Earth, Sun, and Moon Systems
| Question | Answer |
|---|---|
| A phenomenon or process that involves multiple steps and repeats itself | Cyclic patterns |
| The shape of the illuminated portion of the Moon as seen by an observer, usually on Earth | Lunar phase |
| A celestial body that revolves around a planet | moon |
| The luminous star around which Earth and other planets revolve; composed mainly of hydrogen and helium | Sun |
| A celestial body consisting of a mass of gas held together by its own gravity in which the energy is generated by nuclear reactions in its interior | star |
| All of space and time, including planets, stars, galaxies, and all other forms of matter and energy | Universe |
| A naturally occurring physical object or entity that exists in the observable universe | celestial body |
| A system of millions or billions of stars, together with gas and dust, held together by gravitational attraction. | galaxy |
| The force that causes objects with mass to attract one another. It depends on two things: mass and distance. | Gravitational force |
| Having the tendency to pull other objects toward itself, or the gravitational pull between objects | attraction |
| When the Earth, Moon, and Sun line up perfectly, and the Earth’s shadow falls on the Moon, it is called a | Lunar eclipse |
| One reason the Earth experiences seasons is because the Earth _____________ around the sun. | revolves |
| The Earth takes _________ to _____________ around its axis. | 24 hours, rotate |
| When the Earth's axis is tilted towards the sun, and solar energy hits the NORTHERN hemisphere with the greatest intensity, it is ___________ in the NORTHERN hemisphere. | summer |
| When the Earth's axis is tilted away from the sun, and solar energy hits the SOUTHERN hemisphere with the greatest intensity, it is ___________ in the NORTHERN hemisphere. | winter |
| The name of our galaxy: | Milky Way |
| The trip around the Sun that Earth takes along its orbit is called a __________ and it takes approximately ____________ to complete. | revolution, 365 1/4 days |
| When the Earth, Moon, and Sun line up perfectly, and the Moon passes between the Earth and the Sun and casts a small shadow on the Earth, it causes a | Solar eclipse |
Created by:
Ms. Traynor-Grimes (Ms.TG)
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