Cosmology and Astronomy Worksheet
Explore the wonders of the universe with this Grade 8 Science worksheet on Cosmology and Astronomy, covering topics like the Big Bang, celestial bodies, and space exploration.
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Standards
Topics
Cosmology and Astronomy
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Read each question carefully and answer to the best of your ability. Good luck!
1. Which theory describes the origin of the universe as a rapid expansion from a hot, dense state?
Steady State Theory
Big Bang Theory
Pulsating Universe Theory
Inflationary Theory
2. Which of the following celestial bodies is primarily composed of rock and metal, orbits the Sun, and has cleared its orbital path?
Comet
Asteroid
Planet
Dwarf Planet
1. The four inner planets of our solar system are , , , and .
2. A is a large, self-luminous celestial body that generates heat and light through nuclear fusion.
3. The Milky Way is a galaxy, which means it has a central bulge and spiral arms.
1. The Sun is a star located at the center of the Milky Way galaxy.
True
False
2. Black holes are regions in space where gravity is so strong that nothing, not even light, can escape.
True
False
1. Briefly explain the difference between astronomy and cosmology.
2. Describe the main components of our solar system, including the types of celestial bodies found within it.
Match each term on the left with its definition on the right.
1. Galaxy
a. A celestial body that orbits a star and has sufficient mass to be round.
2. Planet
b. A vast system of stars, gas, dust, and dark matter held together by gravity.
3. Nebula
c. A cloud of gas and dust in outer space, visible in the night sky either as a luminous patch or as a dark silhouette against other luminous matter.