6th Grade Science Review

4. Earth's crust is composed of continental and oceanic ________.
5. Thicker guitar strings changes the ______ made by the guitar.
7. The theory that all of the continents were once joined in a single, huge landmass.
9. Make up all matter.
11. Atoms begin to move closer when ______ is removed.
12. Earth's plates move due to ______ currents in the mantle.
13. Sound travels slower in ________ because of the decreased distance between particles.
15. Earth's core is composed of a ______ outer region surrounding solid iron inner core.
16. Provides food and energy for plants.
21. Energy in a food chain flows from the sun, to ______, then to decomposers.
24. Earthquake, sound and light waves transmit _______.
26. When two plates converge, they will form _______.
27. Light ________ off of objects and into our eyes.
28. A substance through which a wave can travel.
29. Atoms vibrate _____ when the temperature increases.
30. A type of rock that forms when intense heat or pressure squeeze the sedimentary rock to change it to this type of rock.
32. Horizontal distance between the crests or between the troughs of two waves.

1. The spins of Earth on its axis.
2. When the moon comes between Earth and the sun and the shadow of the moon falls part of the Earth is forms a _______ eclipse.
3. The process by which rock materials are broken down by the action of physical or chemical processes.
6. Average yearly rainfall is an ______ factor in an ecosystem.
8. The height of a wave's crest.
9. Earth has a breathable _______.
10. Rubber is a poor _______ of heat and electricity.
14. 250 ml of water and 500 ml of water have the same _______.
17. Dark, organic material formed in soil from the decayed remains of plants and animals.
18. Two iron magnets contain the ______ atoms and elements.
19. The moon has phased due its its position changes in relation to the _______ and Earth.
20. A type of rock that forms when grains of sediment are pressed and cemented together.
22. Visible light is the part of the electromagnetic spectrum that can be seen with the _______.
23. A type of rock that forms from the cooling of molten rock at or below the surface.
25. Produces and stores pollen for a flower.
27. The bending of a wave as the wave passes between two substances in which the speed of the wave differs.
31. Earth has seasons due to the ______ of the axis.