Homework
Study Guide over Chapter 14-Part 2-Light
1. How do most plants use light energy?
Through photosynthesis, plants use light energy to make sugar.
2. What would the earth be like without energy from the sun?
Without energy from the sun, everything on earth would be a frozen wasteland with
nothing living on it.
3. What are three types of electromagnetic waves that have wavelengths too short to see?
Ultraviolet light, x-rays, and gamma rays have wavelengths too short to see.
4. What are two ways that high-energy waves can be helpful to humans?
Ultraviolet lights help detectives find fingerprints and stains at crime scenes.
Microwaves can help us cook our food.
X-rays help us to see through our skin to check for broken bones.
Gamma rays are sometimes used to kill cancer cells in people with cancer.
5. Name 1 object that is opaque, one that is translucent, and one that is transparent.
Answers will vary (some examples: walls are opaque, curtains are translucent, and windows are transparent)
6. What happens to light as it passes through water and air?
As light passes through water and air, that light slows down and is refracted (bent).
7. What are the two types of lenses? How do they each refract light?
Convex lenses refract light by focusing a lot of light into one point.
Concave lenses refract light to spread it out in many directions.
Study Guides
Each week, the students will receive a study guide. The study guide is made up of two parts: the notes section and the question/answer section. We will complete the notes section in class, so there's no need to worry about that side at home. If you miss class, you may get the notes from another student who was present. The question/answer section of the study guide should be completed at home. All of the answers on the study guide should either be in your textbooks or can be answered based on the notes we took in class. Usually the answers will be in both your notes AND the textbook, so textbooks should be taken home to complete the assignment. The quiz questions will be based on the study guides, so it is very valuable to study them for the quizzes.
The due date for each study guide should be located on the study guide, but usually it will be due on Friday unless otherwise noted. I will check them and give them back to you so that you can study it over the weekend. If you don't show me your study guide the day it's due, there will be a penalty of -25% each day it's late. After the following Tuesday, the study guide will not be worth any points. Homework is worth 8% of a student's grade.
1. How do most plants use light energy?
Through photosynthesis, plants use light energy to make sugar.
2. What would the earth be like without energy from the sun?
Without energy from the sun, everything on earth would be a frozen wasteland with
nothing living on it.
3. What are three types of electromagnetic waves that have wavelengths too short to see?
Ultraviolet light, x-rays, and gamma rays have wavelengths too short to see.
4. What are two ways that high-energy waves can be helpful to humans?
Ultraviolet lights help detectives find fingerprints and stains at crime scenes.
Microwaves can help us cook our food.
X-rays help us to see through our skin to check for broken bones.
Gamma rays are sometimes used to kill cancer cells in people with cancer.
5. Name 1 object that is opaque, one that is translucent, and one that is transparent.
Answers will vary (some examples: walls are opaque, curtains are translucent, and windows are transparent)
6. What happens to light as it passes through water and air?
As light passes through water and air, that light slows down and is refracted (bent).
7. What are the two types of lenses? How do they each refract light?
Convex lenses refract light by focusing a lot of light into one point.
Concave lenses refract light to spread it out in many directions.
Study Guides
Each week, the students will receive a study guide. The study guide is made up of two parts: the notes section and the question/answer section. We will complete the notes section in class, so there's no need to worry about that side at home. If you miss class, you may get the notes from another student who was present. The question/answer section of the study guide should be completed at home. All of the answers on the study guide should either be in your textbooks or can be answered based on the notes we took in class. Usually the answers will be in both your notes AND the textbook, so textbooks should be taken home to complete the assignment. The quiz questions will be based on the study guides, so it is very valuable to study them for the quizzes.
The due date for each study guide should be located on the study guide, but usually it will be due on Friday unless otherwise noted. I will check them and give them back to you so that you can study it over the weekend. If you don't show me your study guide the day it's due, there will be a penalty of -25% each day it's late. After the following Tuesday, the study guide will not be worth any points. Homework is worth 8% of a student's grade.