Science: Mid-year review

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Across
  1. 4. the MASS of a planet increases, the strength of its gravity will: _____________
  2. 5. This is at the center of the solar system. Holds all the planets in orbit
  3. 6. Sunlight strikes the surface of the Earth in straight and _________ lines
  4. 8. describes the speed AND direction an object is moving
  5. 10. The __________ force is the number you get when you add up all the forces acting on an object. If it is bigger than 0, the forces are unbalanced and the object will accelerate
  6. 11. A __________ eclipse occurs when the Sun, Moon and Earth line up and the moon's shadow blocks out the sun
  7. 14. If the net force applied to an object increases, its acceleration will ____________
  8. 16. The _________ of the sunlight to the Earth determines the season/ temperature/ climate. The ________ of the moon to the Earth and sun determines the phase we see! (same word)
  9. 17. A CHANGE in speed and/or direction
  10. 19. The two things that affect how fast an object will accelerate are _________ and force
  11. 20. This is the variable that you change in a lab. The before/ cause
  12. 23. Which object, a feather or brick will be easier to accelerate?
  13. 24. This is the variable that you measure or observe in a lab. The after/ effect
Down
  1. 1. The only way to accelerate an object is to apply an ____________ force
  2. 2. Happens twice a year, when night and day are the exact same length
  3. 3. The most massive planet in the solar system
  4. 4. Means mass. The more ____________ an object has, the harder it will be to move
  5. 5. The longest day of the year when the northern hemisphere is tilted directly at the sun is called the summer ___________
  6. 7. If the mass of an object increases, its acceleration will __________
  7. 9. When the visible part (lit up) is getting bigger
  8. 12. What is the independent variable in this question: "What is the effect of MASS on ACCELERATION?"
  9. 13. The moon lights up because it ___________ sunlight
  10. 15. The angle of the Sun to the Earth's surface is also called _______
  11. 18. This can happen when the Sun, Earth and moon line up perfectly
  12. 21. This is the reason why Earth has seasons and other planets don't
  13. 22. What is the force that pulls you down and keeps you from floating off into space? It also holds the planets in orbit!