4 MP End Benchmark Review

2. A hole in the eye that allows light to enter.
7. Anterior portion of the brain, consisting of two hemispheres; the most prominent part of the human brain.
9. The point where the optic nerve enters the retina and which is not sensitive to light.
12. Word that is used to refer to “the front.”
13. A chemical reaction between a metal and the air.
14. The small densely striped structure that lies below and to the back of the brain; processes balance and coordination
20. The colored part of the eye that contracts and expands to allow in different amounts of light.
21. A law that states that mass cannot be created or destroyed.
23. A chemical substance that turns litmus blue and is characterized by a pH of more than 7.
25. A spot on the retina that contains most of the eye’s cone cells and few blood vessels.
26. A thin translucent layer lining the back of the eye, receives images formed by the lens.
27. A type of photoreceptor that is shaped like a rod and responds to dim light.
28. The clear colorless jelly filling the eyeball behind the lens and holds internal structures of the eye in place while maintaining its shape.
30. Word that is used to refer to “the bottom.”

1. A measure of how acid or basic a substance is, ranging in values from 1 (most acidic) to 14 (most basic).
3. A substance formed by a chemical reaction.
4. Word that is used to refer to “the back.”
5. The white part of the eye.
6. The clear, rounded outer covering of the eye.
8. Word that is used to refer to “the top.”
10. A type of cell that responds to color and light.
11. The wrinkled gray covering of the cerebrum where millions of neurons make sense out of the signals that come into the brain.
12. A clear fluid between the lens and cornea of the eye.
15. A bundle of nerve that carries messages from the retina to the brain.
16. The spot in the eye where there are no photoreceptors, and therefore no vision.
17. the front of the cerebrum, processes thought, reason and emotion.
18. The starting substances in a chemical reaction.
19. A type of photoreceptor that distinguishes color and detects fine details in objects.
22. A small cordlike structure in the center of the brain
24. A chemical substance that turns litmus red and is characterized by a pH of less than 7.
29. the object formed when light rays come together to focus.