Science Midterm

2. Seafloor spreading occurs at the Mid-Atlantic __________.
4. Subduction occurs at the __________.
9. The greater the mass of an object, the less acceleration an object has in motion. The greater the force an object is given, the more acceleration an object has in motion. This is called Newton’s __________ law.
11. __________ currents occur when hot magma rises and cool magma sinks over and over.
12. The __________ is the layer that is made up of rock.
14. When a hemisphere receives more indirect sunlight, it is __________.
15. __________ is the breaking down of rocks.
19. The __________ of the Earth around the Sun takes one year.
20. Transform boundaries can cause __________ to occur.
22. An object is in __________ when it changes its position.
23. When a hemisphere receives more direct sunlight, it is __________.
24. __________ are pieces of sand, rock, and other materials.
26. Convergent boundaries can cause __________ to form.
27. The __________ of Earth takes one day.
28. When any type of rock is melted, it becomes __________.
30. Divergent boundaries can cause __________ spreading to happen.
32. __________ rocks are formed from magma cooling and hardening.
33. The revolution of the Moon around the Earth takes one __________.
34. Earth has seasons because of its __________.

1. The __________ is the hottest and densest layer of the Earth.
3. __________ boundaries occur when plates move apart.
5. Convection __________ occur in the mantle.
6. __________ is the movement of weathered rocks.
7. __________ boundaries occur when plates come together.
8. __________ drift theory is the theory that the continents once fit together but broke apart and slowly drifted apart.
9. __________ occurs when the old rock layer is pushed back down into the mantle and melted into magma.
10. For every action, there is an equal and opposite reaction. This is called Newton’s __________ law.
13. Seafloor __________ occurs when magma erupts from the Mid-Atlantic ridge and cools and hardens into a new rock layer.
16. The change of speed is called __________.
17. Sedimentary rocks are formed from cementation and __________ of sediments.
18. __________ rocks are formed from heat and pressure.
21. __________ is how heavy or light an object is for its size.
25. __________ boundaries occur when plates slide past each other.
26. The __________ is the layer that consists of magma.
29. __________ is the supercontinent containing all the continents.
31. If an object is in motion, it stays in motion until an unbalanced force acts on it. If an object is at rest, it stays at rest until an unbalanced force acts on it. This is called Newton’s __________ law.