Science

8. drift, large-scale horizontal movements of continents relative to one another and to the ocean basins during one or more episodes of geologic time.
9. the process by which plants use sunlight, water, and carbon dioxide to create oxygen
11. the evolutionary process whereby an organism becomes better able to live in its habitat or habitats
12. a material which has two or more types of molecules.
13. a device that gives energy to the charged particles constituting the current.
15. a pure substance which contains identical atoms or molecules with only one type of atomic core.
17. a pure substance which contains identical molecules with two or more types of atomic core.

1. spreading, a geologic process in which tectonic plates apart from each other
2. a measure of the quantity of charge passing any point of the wire per unit of time
3. A statement about a specific research question, and it outlines the expected result of the experiment
4. the pressure from an electrical circuit's power source that pushes charged electrons (current) through a conducting loop.
5. respiration, the process by which organisms use oxygen to break down food molecules to get chemical energy for cell functions.
6. a geographic area where plants, animals, and other organisms, as well as weather and landscapes, work together to form a bubble of life
7. chain, a linear sequence of organisms through which nutrients and energy pass as one organism eats another.
10. resistance is a measure of the opposition to the flow of current in an electrical circuit.
14. plates, massive slab of solid rock made up of Earth's lithosphere (crust and upper mantle)
16. web, a complex network of interconnecting and overlapping food chains showing feeding relationships within a community.