Unit 1, Chapter 1

1. Unit 1, Chapter 1 Integrated Science

2. Unit One: Forces and Motion Chapter 1 Science and Measurement • 1.1 Time and Distance • 1.2 Investigations and Experiments • 1.3 Speed

3. Chapter 1 Learning Goals • Accurately measure time using electronic timers and photogates. • Use decimals to represent fractions of a second. • Develop a research question or hypothesis that can be tested. • Identify the variables that affect motion. • Develop an experimental technique that achieves consistent results. • Draw conclusions from experimental results. • Accurately measure distance. • Identify metric and English units of distance. • Convert between units of distance. • Calculate speed in units of inches per second, feet per second, and centimeters per second.

4. cause and effect controlled experiment controlled variables distance English system experiment experimental technique experimental variable hypothesis investigation length measurement metric system procedure research question scientific evidence scientific method second time trial variables Chapter 1 Vocabulary Terms

5. 1.1 Time and Distance • Two ways to think about time: • What time is it? • How much time?

6. 1.1 Time and Distance • Time comes in mixed units. • Seconds are very short. • Hours and minutes are more convenient for everyday time measurement.

7. 1.1 Time and Distance • Electronic timers have displays that show mixed units. • To read a timer you need to recognize and separate out the different units. • Colons (:) separate the units.

8. 1.1 Measurement and English System

9. 1.1 Measurement and Metric System

10. 1.1 Measurement and Metric System • Units were invented so people could communicate amounts to each other.

11. Key Question: How do we describe and measure the world? 1.1 Time and Distance *Read text section 1.1 BEFORE Investigation 1.1

12. Key Question: How do we ask questions and get answers from nature? 1.2 Investigations and Experiments *Read text section 1.2 AFTER Investigation 1.2

13. An experiment is any situation we set up to observe what happens. In science, we usually plan our experiments to give us measurements, which are observations we can record and think about. Experiments have questions associated with them. Experiments are the way we ask questions of nature. 1.2 Investigations and Experiments

16. The speed of an object is a measure of how quickly the object gets from one place to another. To determine a speed, you need to know two things: the distance traveled. the time taken. 1.3 Speed

17. 1.3 Speed distance traveled (m) v = d t speed (m/sec) time taken (sec)

18. Key Question: What is speed and how is it measured? 1.3 Speed *Read text section 1.3 BEFORE Investigation 1.3

19. How to Solve Science Problems • Step 1 • Identify what you are asked. • Step 2 • Write down what you are given. • Step 3 • Write down any relationships you know that involve any of the information you are asked, or given. • Step 4 • Pick which relationship to start with and try to arrange it to get the variable you want on the left-hand side of an equal sign. • Step 5 • Plug in the numbers and get the answer.