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.
Solved
Show answers
More tips
- H Health and Medicine Understanding Pregnancy Tests: What You Need to Know?...
- H Health and Medicine What Makes a Man a Man?...
- C Computers and Internet How to Get Rid of Spam in ICQ?...
- A Art and Culture Who Said The Less We Love a Woman, the More She Likes Us ?...
- F Family and Home How to Get Rid of Your Neighbors?...
- S Society and Politics How Could Nobody Know About the Dead Mountaineers?...
- H Health and Medicine How to Cure Adenoids?...
- H Health and Medicine Why Wearing a Back Brace Can Be Beneficial During Back Strain?...
- S Sport When and Where Will the 2014 World Cup be Held?...
- C Computers and Internet How to Choose a Monitor?...
Ответ:
Explanation:
The potential for blooms comes from nutrient pollution, an overabundance of the essential plant nutrients nitrogen and phosphorus. ... When the concentrations of nitrogen and phosphorus increase in a water body, the right combination of temperature, sunlight and low flow can trigger an algal bloom.