SECTION 4-2 REVIEW AND REINFORCE
Refraction and Lenses
• Understanding Main Ideas
Answer Questions 1 - 3 on a separate sheet of paper.
Figure 1
Figure 2
1. What kind of lens is pictured in Figure 1?
2. What kind of lens is pictured in Figure 2?
3. On the diagram, show how the direction of the parallel rays changes after they
pass through each lens.
4. What causes light rays to bend?
5. What kind of image is formed by a concave lens?
6. Describe the two possibilities for an image formed by a convex lens.
• Building Vocabulary
Fill in the blank to complete each sentence.
7. A(n)
is an image of a distant object caused by light refraction
through air of varying temperature.
8. A(n)
is a curved piece of glass or other transparent substance
that is used to refract light.
9. A(n)
lens is thicker in the center than at the edges.
10. A(n)
lens is thinner in the center than at the edges.
11. The
is a measure of how much a ray of light
bends when it passes from one medium into another.

Read the following scenario to answer the following question. over the past 60 years, many amphibian species have experienced significant population declines, and some species have become extinct. scientists suspected that local human activities such as the destruction of wetlands, regional pollution, and deforestation were the main reasons for these losses. however, research over the past 20 years reveals significant amphibian population declines in protected areas of the world, such as nature preserves and parks. these global declines suggest widespread problems including increased ultraviolet radiation, acid rain, and disease. in switzerland, for example, 14 of the 20 native amphibian species are threatened with extinction. when most populations of a wide-ranging amphibian species are lost and the few remaining populations are widely separated, we expect to see that a. the founder effect becomes increasingly important b. microevolution no longer occurs c. gene flow between populations is reduced d. artificial selection becomes a greater factor in microevolution

Question 3(multiple choice worth 4 points) (02.04 lc) which best describes the function of chloroplast? allows certa molecules to enter and exit the cell makes food during photosynthesis detoxifies waste products o packages proteins into vesicles

The third stage of cellular respiration is (2 points)