Science - Unit C-Chapter 4
Terms
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- A rocky object that revolves around the sun
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A. asteroid
B. meteoroid
C. meteor - A small piece of rock or metal that travels in space around the sun
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A. asteroid
B. meteoroid
C. meteor - A bright streak of light that passes through the Earth's atmosphere
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A. asteroid
B. meteoroid
C. meteor - A ball of ice, dust, and gases that travels through space and orbits the sun
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A. comet
B. meteorite
C. asteroid - Meteor that reaches the earth's surface
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A. comet
B. meteorite
C. asteroid - What kind of path do the plantets follow around the sun?
- An oval path
- What is the largest planet?
- Jupiter
- What is the smallest planet?
- Pluto
- Why are Uranus and Neptune alike?
- Because they both have rings, are made of gases and are blue-green
- What keeps the planets in orbit as they orbit the sun?
- Gravity
- Why do planets often look brighter than the stars?
- Because the planets are closer to the Earth than the stars
- How do astronomers measure distances in the solar system?
- In astronomical units (AU)
- What is an AU equal to?
- 93,000,000 miles
- What is the closest object to the Earth in the solar system?
- The moon
- Where is the asteroid belt located?
- Between Mars and Jupiter
- How are meteoroids formed?
- When asteroids collide or a comet breaks up
- If a comet were moving away from the sun, where would its tail be?
- On the side away from the sun
- What would happen if the Earth did not receive any energy from the sun?
- The Earth would become dark and cold
- What causes tides on Earth?
- The gravitational pull of the moon and sun
- The distance light travels in one year
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A. light year
B. constellation
C. galaxy - Stars that appear to be in a group when viewed from Earth
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A. light year
B. constellation
C. galaxy - A group of billions of stars, dust, and gases in space held together by gravity
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A. light year
B. constellation
C. galaxy - Why does the sun seem brighter than other stars?
- Because the sun is much closer to Earth
- How long does it take for light from the sun to reach the Earth?
- 8 minutes
- What does a star's brightness depend on?
- Its size, temperature, color, and distance from the Earth
- Are astronomical units (AU) useful in measuring distance to the star, why or why not?
- No, because the units are not big enough to measure long distances in space
- What do astronomers use to measure distances to stars?
- They use a light year, which is about 6 trillion miles
- Name the order of the colors of the stars from the coolest to the hottest.
- red, orange, yellow white, and blue
- What galaxy is our solar system in?
- The Milky Way galaxy
- The bending of light as it passes from one material to another
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A. refraction
B. reflection - The bouncing of light off a surface
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A. refraction
B. reflection - What do telescopes do?
- Make distant objects appear closer and clearer
- How many kinds of telescopes are there that gather and focus light and what are there names?
- 2 kinds, reflecting and refracting telescopes
- What do telescopes in space do?
- They produce better images than those on Earth because space images do not have to pass through the atmosphere, which can blur the focus
- Name a famous space telescope.
- The Hubble Telescope
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Science Flashcards
Unit C Chapter 4
Astronomy -
Science Flashcards
Unit C Chapter 4
Astronomy