Lesson 1 "What Are Motion and Speed"

Turn to page173 look at the picture on those pages read about it and the short introduction to Chapter 7

Visually Scan Pages 174-178; focus on the blue boxes, which contain the key vocabulary terms.

Visually Scan Pages 174-178 for pictures and diagrams, read each of the captions.

Look for and read any little blue boxes on pages 174-178

Read Pages 174-177 (take notes of important ideas)

Do you know the answers to the questions on page 178? (See Key Points below for help)

Do you know the vocabulary words? (See Key Points below for help)

Take the quiz on Lesson 1 "What Are Motion and Speed" (You may use the book, notes and Key Points for help on the quizzes. NOT ON TESTS!)

Review answers on the quiz and print it out. This will be very useful when you are studying for the test.

Lesson 1 Key Points

Vocabulary Terms

Motion - a change in position

Elapsed time - the length of time that passes from one event to another

speed - the rate at which the position of an object changes.

Distance - the length of the path between two points.

Section Review Answers

1. 6 miles/hour
2. 7.7 yd/sec
3. 2 cm/sec
4. 190 km/hr
5. 127.5 ft/min
6. 120 km/hr
7. 5 mi ÷ 16 mi/hour = .31 hours
8. 500 mi/hr x 5 hr = 2,500mi
9. 18,000 mi/hr x 4.5 hr = 81,000 miles
10. 45 mi/hr x 2 hr = 90 mi

Did you learn these Objectives?

Can you define and explain motion?

Are you able to calculate elapsed tim?

Can you explain speed and average speed?

Are you able to perform calculations involving speed?

Lesson 2 "Using a Graph to Describe Motion"

Visually Scan Pages 179-184; focus on the blue boxes, which contain the key vocabulary terms.

Visually Scan Pages 179-184 for pictures and diagrams, read each of the captions.

Read Pages 179-183 (take notes of important ideas)

Do you know the answers to the questions on page 184? (See Key Points below for help)

Do you know the vocabulary words? (See Key Points below for help)

Take the quiz on Lesson 2 "Using a Graph to Describe Motion" (You may use the book, notes and Key Points for help on the quizzes. NOT ON TESTS!)

Review answers on the quiz and print it out. This will be very useful when you are studying for the test.

Lesson 2 Key Points

Vocabulary Terms

Constant speed - speed that does not change.

velocity - the speed and direction in which an object is moving.

Section Review Answers

1. Students' graphs should show distances increasing by 100 kilometers every hour.
2. The straight line shows that the speed is constant.
3. A 30km; B 450 km; C 700km; D 1000km
4. If the plotted line is straight, the speed is constant. If the plotted line is not straight, the speed varies.
5. The plotted line on this graph should not be straight because the speed varies and is not constant.

Did you learn these Objectives?

Can you use a graph to describe motion?

Are you able to make predictions about distance, using a distance-time graph?

Can you explain what is meant by varying speed?

Can you explain how to recognize varying speed on a distance-time graph?

 Investigation 7-1 "Finding Speed"

Optional, (must complete 3 this quarter)

Gather the materials you need; safety glasses, 2 books, meter stick, marble, stopwatch or a watch/clock that shows seconds.

Follow the procedure on page 185-186.

Complete the follow-up investigation quiz. (The 3 questions will be the same as the three questions on P186)

Lesson 3 "Acceleration"

Visually Scan Pages 187-191; focus on the blue boxes, which contain the key vocabulary terms.

Visually Scan Pages 187-191 for pictures and diagrams, read each of the captions.

Visually Scan for an read the short articles in the blue boxes that you find on Pages 187-191.

Read Pages 187-190 (take notes of important ideas)

Do you know the answers to the questions on page 191? (See Key Points below for help)

Do you know the vocabulary words? (See Key Points below for help)

Take the quiz on Lesson 3 "Acceleration" (You may use the book, notes and Key Points for help on the quizzes. NOT ON TESTS!)

Review answers on the quiz and print it out. This will be very useful when you are studying for the test.

Lesson 3 Key Points

Vocabulary Terms

acceleration - the rate of change in velocity.

deceleration - the rate of slowdown.

Section Review Answers

1. 2 km/hr per sec
2. 22.25 km/sec per sec
3. 5 km/hr per sec
4. 1 m/sec per sec
5. -40 mm/sec per sec
6. 10 mm/sec per sec
7. -30 cm/sec per sec
8. 5 km/hr per sec
9. 3 m/min per sec
10. 10 cm/sec per sec

Did you learn these Objectives?

Can you define and explain acceleration

Are you able to perform calculations involving acceleration

Can you explain and define deceleration.

Are you able to perform calculations involving deceleration?

Lesson 4 "The Laws of Motion"

Visually Scan Pages 192-195; focus on the blue boxes, which contain the key vocabulary terms.

Visually Scan Pages 192-195 for pictures and diagrams, read each of the captions.

Visually Scan for an read the short articles and questions in the blue boxes that you find on Pages 192-195.

Read Pages 192-194 (take notes of important ideas)

Do you know the answers to the questions on page 195? (See Key Points below for help)

Do you know the vocabulary words? (See Key Points below for help)

Take the quiz on Lesson 5 "The Laws of Motion?" (You may use the book, notes and Key Points for help on the quizzes. NOT ON TESTS!)

Review answers on the quiz and print it out. This will be very useful when you are studying for the test.

Lesson 4 Key Points

Vocabulary Terms

Force - a push or a pull

friction - a force that opposes motion and that occurs when things slide or roll over each other.

inertia - the tendency of an object to resist changes in its motion.

Section Review Answers

1. Law 1: If no force acts on an object at rest, it will remain at rest. If the object is moving, it will continue moving at the same speed and in the same direction if no force acts on it. Law 2: The amount of force needed to produce a given change in the motion of an object depends on the mass of the object. The larger the mass, the more force is needed to give it a certain acceleration. Law 3: For every action, there is an equal and opposite reaction.
2. Friction causes it to slow down and stop.
3. A force must act on the object for it to begin moving.
4. The reaction force is the nail hitting the hammer.
5. Car A will have half the acceleration of car B.

Did you learn these Objectives?

Are you able to explain what is meant by a force?

Are you able to define and explain friction?

Are you able to explain and apply the three laws of motion?

Lesson 5 "Gravity"

Visually Scan Pages 196-198; focus on the blue boxes, which contain the key vocabulary terms.

Visually Scan Pages 196-198 for pictures and diagrams, read each of the captions.

Visually Scan for an read the short articles and questions in the blue boxes that you find on Pages 196-198.

Read Pages 196-197 (take notes of important ideas)

Do you know the answers to the questions on page 198? (See Key Points below for help)

Do you know the vocabulary words? (See Key Points below for help)

Take the quiz on Lesson 5 "Gravity" (You may use the book, notes and Key Points for help on the quizzes. NOT ON TESTS!)

Review answers on the quiz and print it out. This will be very useful when you are studying for the test.

Lesson 5 Key Points

Vocabulary Terms

Gravity - the force of attraction between any two objects that have mass.

Law of universal gravitation - gravitational force depends on the mass of the two objects involved and on the distance between them.

Section Review Answers

1. Gravity is the force of attraction between two objects that have mass.
2. The mass of objects, the product of the masses, and the distance between objects affect the pull of gravity.
3. The moon has less gravity, so the astronaut's weight is less since weight is a factor of the pull of gravity on and object.
4. The force of gravity causes objects to speed up as they fall. It causes all objects to have the same acceleration as they fall.
5. Gravity causes an object to speed up as it falls, but other forces such as air resistance causes falling objects to slow down.

Did you learn these Objectives?

Can you define and explain gravity?

Are you able to state the law of universal gravitation?

Can you explain how air resistance and gravity affect acceleration?

Investigation 7-2 "Newton's Third Law of Motion"

Optional, (must complete 3 this quarter)

Gather the materials you need; safety glasses, string, 3 meters long, 2 straws, 2 chairs, 2 long balloons, masking tape.

Follow the procedure on page 199-200.

Complete the follow-up investigation quiz. (The 5 questions will be the same as the 5 questions on P200)

 Preparing for Chapter 7 Test

Turn to Page 201 and read the Chapter 7 summary.

On pages 202-203 you will find the Chapter 7 review, complete the review.

Check your answers with those in the Key Points.

Take the Chapter 7 Test "Motion"

Review the answers then print the results for your records.

Chapter 7 Review answers

1. Law of Universal Gravitation
2. motion
3. force
4. friction
5. inertia
6. B
7. C
8. D
9. C
10. C
11. A
12. The bicycle's speed is 4.7 miles per hour.
13. At the end of 7 hours, the train will have traveled 350 miles. The graph shows the train traveling at a constant rate of 50 miles per hour. By extending the straight line to the seventh hour, I can predict the distance the train will travel in 7 hours.
14. The empty bus has less mass and therefore less force is needed for it to accelerate.
15. A greater mass exerts a greater force of gravity.

Congratulations you finished the seventh chapter !!