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Space Review Notes
Question | Answer |
---|---|
Where is our Solar System? | In the Milky Way Galaxy. |
Where are Galaxies? | In the Universe. |
What is Rotation? | Rotation is the spinning of the earth on its axis |
What is Revolution? | Revolution is the traveling around the sun. |
How long does it take to revolve around the sun? | It takes 365.25 days or a year. |
What is the path of a Revolution called? | An orbit. |
How long does it take for our solar system to travel around our galaxy? | 250 million years. |
Why are there seasons? | Seasons are produced because the Earth is tilted on its axis, and because |
Why does Winter occur? | Winter occurs in the hemisphere that is tilted away from the sun. |
Why does Summer occur? | Summer occurs in the hemisphere that is tilted toward the sun. |
What are Solstices? | The days when the earth is most tilted toward the sun are called the solstices. |
What are Equinoxes? | The days when the earth is not tilted toward the sun are called the equinoxes. |
What is the moon? | The moon is a satellite. |
How many phases does the moon have? | Eight. |
What are the order of the moon phases? | New moon, Waxing crescent, First quarter, Waxing gibbous, Full moon, Warning gibbous, Third quarter, and then Waxing crescent. |
What are Tides? | Tides are the regular changing of sea level at a particular location. |
How are tides called? | Tides are caused by the pull of gravity between the moon and the sun. |
How many high tides are there? | Two |
How many low tides are there? | Two |
What are Neap tides? | Neap tides occur two times each month when the sun and the moon are at right angles. Neap tides are lower than normal tides. |
What are Spring tides? | Spring tides occur two times each month when the sun and moon are in line. Spring tides are higher than normal tides. |
What is an Eclipse? | An eclipse occurs when one object casts a shadow on another. |
What are Solar Eclipses? | Solar eclipses look like the sun becomes covered. The moon blocks the Earth’s view of the sun. |
What are Lunar Eclipses? | Lunar eclipses look like the moon becomes covered. The Earth blocks light from the sun making a shadow on the moon. |
What are the planets in order? | Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune, and Pluto. |
What is an Asteroid? | An asteroid is an irregular shaped rock that can be as large as a small moon, but too small to be a planet. |
What are Comets? | A comet is mixture of frozen gases and tiny dust particles. |
What are Meteors? | A meteor is a rock that enters earth’s atmosphere and burns up creating a streak of light. They are also called shooting stars. |
What are the four Earth Systems? | Lithosphere, Atmosphere, Hydrosphere, and the Biosphere |
What is the Lithosphere? | The lithosphere includes the Earth’s crust and the upper part of the mantle. 100 kilometers thick Made up of both the continental and oceanic crust. The elements Oxygen, Silicon, and Aluminum have the highest percentage in Earth’s crust. |
What is the Atmosphere? | The atmosphere is made up of the gases that surround the Earth. Nitrogen, oxygen, and argon are elements with the highest percentage in the atmosphere. The gases include: Nitrogen, Oxygen, Argon, Carbon dioxide, water vapor, and other gases. |
What is the Hydrosphere? | Hydro refers to water. The hydrosphere includes all the water found on Earth. The oceans hold 78% of Earth’s water. |
What is the Biosphere? | The biosphere includes all the living things and the environment in which they live. |
What are Fossil Fuels? | Fossil Fuels are the remains of plants and animals that died millions of years ago. They are deep in the earth and chemical changes slowly turn them into useful fuel. |
What are the 3 most common fossil fuels? | Coal, oil, and natural gas. |
What is Nuclear Power? | When the atoms of Uranium or Plutonium are split apart, this produces a great amount of heat energy. |
What is Wind Energy? | Wind is used to generate electricity. |
What is Solar Power? | Uses heat and light energy from the sun. Can be used for producing electricity. Does not produce air or water pollution |
What is Hydroelectric power? | Uses moving water from dams to make electricity. Does not produce air or water pollution |
What are the five main energy resources. | Fossil Fuels, Nuclear Power, Wind Energy, Solar Power, Hydroelectric Power |