8th Grade Science

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Across
  1. 6. During this phase of the moon, it appears to be growing larger in the sky, moving from a crescent to a full moon.)
  2. 7. Cutting paper into smaller pieces or melting ice cream are examples of changes like this.)
  3. 9. When you rub your hands together, you feel warmth due to this force resisting the motion between your skin.)
  4. 11. When you press the gas pedal in a car, you're causing this, whether it's speeding up, slowing down, or changing direction.)
  5. 12. Think of this as the "currency" of the universe, allowing things to happen and change.)
  6. 14. When the tide is at its lowest, the water level is at this point.)
  7. 15. Water, salt, and sugar are all examples of substances made up of two or more different elements chemically bonded together.)
  8. 16. It's the invisible force that keeps us anchored to the Earth and governs the motion of planets and stars.)
  9. 19. Imagine trying to start a heavy car from rest; this property of matter is why it's hard to get it moving.)
  10. 20. When you throw a ball, its movement through the air is powered by this type of energy.)
  11. 22. It's what causes the change of seasons as the Earth orbits around the sun.)
  12. 25. It's the force responsible for creating tides, pulling water towards the moon and the sun.)
  13. 27. It's what causes day and night as the Earth spins on its axis.)
  14. 28. It's what powers your lights, appliances, and devices, flowing through wires and circuits.)
  15. 29. Burning wood to produce ash and smoke is an example of this kind of change.)
  16. 32. The energy stored in the bonds between atoms within molecules, released during reactions like burning wood or digesting food.)
  17. 33. When more than half but not all of the moon is illuminated, it's in this phase.)
  18. 34. The type of tide with the least difference between high and low water levels, occurring during quarter moons.)
  19. 36. These tides are influenced by the gravitational pull of the sun.)
  20. 38. If you're standing at the top of a slide, you have this type of energy waiting to be released.)
Down
  1. 1. From summer's heat to winter's chill, this is what brings changes to the weather and environment throughout the year.)
  2. 2. These tides are primarily caused by the gravitational pull of the moon.)
  3. 3. The type of tide with the greatest difference between high and low water levels, occurring during full and new moons.)
  4. 4. It's not just how fast something is moving, but also the direction it's moving in.)
  5. 5. Opposite of waxing, during this phase, the moon appears to be shrinking, moving from a full moon to a crescent.)
  6. 8. It's the measure of the gravitational force acting on an object's mass.)
  7. 10. This is what happens when water vapor in the air cools down and turns back into liquid droplets, forming clouds.)
  8. 13. Gold, oxygen, and iron are all examples of substances made up of only one type of this.)
  9. 14. During this type of eclipse, the Earth passes between the sun and the moon, casting a shadow on the moon.)
  10. 17. It's the rise and fall of sea levels caused by the gravitational pull of the moon and the sun.)
  11. 18. On the longest and shortest days of the year, known as these, the sun reaches its highest and lowest points in the sky.)
  12. 21. When a puddle disappears on a hot day, it's because the water is undergoing this process, turning into water vapor.)
  13. 23. It's the amount of matter in an object, determining how much inertia it has.)
  14. 24. This is what you exert when you push a door open or pull a wagon uphill.)
  15. 26. Trail mix and salad are both examples of this, where different substances are physically combined but not chemically bonded.)
  16. 29. When only a small sliver of the moon is visible, it's said to be in this phase.)
  17. 30. It's what happens when one celestial body moves into the shadow of another, like the moon blocking the sun.)
  18. 31. When the tide is at its peak, the water level is at this point.)
  19. 35. It's the time of year when day and night are approximately equal in length, occurring twice annually.)
  20. 37. During this type of eclipse, the moon passes between the Earth and the sun, casting a shadow on the Earth.)
  21. 39. It's the smallest unit of matter, consisting of a nucleus surrounded by a cloud of electrons.)