Unit 1 Test Review - Our Solar System & Beyond
Across
- 2. the 3rd planet from the Sun
- 5. everything we know of exists within this (the largest scale)
- 6. a theory which attempts to explain the formation of the universe as starting from an explosion from a singular point and everything continued to expand out at a rapid rate
- 8. a key piece of evidence used to support the Big Bang theory
- 10. supported the idea of the geocentric model of the solar system
- 12. the farthest region where some comets originate from
- 16. _________ planets is another name given to the inner planets (made of solid rock)
- 18. the science of the study of space and beyond
- 20. the next biggest thing we know of within our solar system after the planets (we have one that orbits us)
- 22. the next biggest thing we know of within our solar system (our sun is the closest we can see)
- 23. what an object is made up of
- 28. The streak of light seen when a space rock enters the atmosphere and starts burning. Also known as a “falling star” or “shooting star”.
- 29. ________ planets are Jupiter, Saturn, Uranus, and Neptune (farthest from the Sun)
- 31. first introduced the idea of the Big Bang theory
- 32. ________ planets are the outer planets which are made of mostly gas and have an icy core
- 34. the most popular asteroid because it’s the largest (so large and unique that it’s called a dwarf planet)
- 36. ________ planets are Mercury, Venus, Earth, and Mars (closest to the Sun)
- 38. the 8th planet from the Sun
- 39. where a planet completely orbits the sun (determines the length of its year)
- 41. next biggest thing we know of within our universe (a large group of stars and matter bound together by gravity)
- 42. an object completely moves around a center point due to their gravitational attraction (can be circular or elliptical)
- 43. the 4th planet from the Sun
- 44. first proposed the geocentric model of the solar system
- 48. the name of our galaxy
- 50. the 2nd planet from the Sun
- 51. where a planet spins on its axis (determines the length of its day)
- 52. model of the solar system where Sun is the center (second model and proven correct)
Down
- 1. an object located in outer space (outside of Earth’s atmosphere)
- 3. Large rocks leftover from the formation of our solar system. They are generally in orbit between Mars and Jupiter, but sometimes get bounced towards Earth.
- 4. we live on a ________ arm of of galaxy
- 7. a force that brings objects with mass towards each other (pulled together by attraction)
- 9. next biggest thing we know of within our galaxy (our sun being orbited by our planets)
- 11. the name of the arm that we live on within our galaxy
- 13. the 7th planet from the Sun
- 14. model of the solar system where Earth is the center (original/first model and proven incorrect)
- 15. the 5th planet from the Sun
- 17. a type of rotation of a planet in which it rotates in the opposite direction of the majority of the planets within our solar system (2 of our planets do this)
- 19. the 6th planet from the Sun
- 21. A chunk of ice and rock originating from the outer solar system (Oort cloud and/or Kuiper Belt) and often accompanied by a coma and a tail.
- 24. A space rock bigger than a dust grain but smaller than an asteroid. Most are a result of asteroid collision and comet debris but haven’t entered Earth’s atmosphere.
- 25. the beginning, or starting point of something
- 26. the most popular comet to us because it’s the only one we can see every 75-76 years from Earth (the shortest orbiting comet)
- 27. A piece of rock that doesn’t entirely burn up when moving through Earth’s atmosphere and lands on Earth’s surface.
- 30. the weight of an object due to what (or how much) “stuff” it is made up of
- 33. the closest planet to the Sun
- 35. an object in motion stays in motion and an object a rest stays at rest unless acted upon by a force
- 37. where asteroids orbit the Sun
- 40. proposed the heliocentric model of the solar system
- 45. the closest region where some comets originate from
- 46. the next biggest thing we know of within our solar system after the Sun (we have 8 of these and live on one of them)
- 47. ________ planets is another name given to the gas giant planets
- 49. confirmed the heliocentric model of the solar system with his telescope invention (his invention also helped support evidence for the Big Bang theory)