1. Matter and Movement

2. Is this guy moving? Why or why not?

3. Is this guy moving? Why are why not?

4. Is the snail moving in this picture?

5. Is the cat moving in this picture?

6. What moved on the lab table?
More importantly, how did you know that it had moved?

7. Motion
When an object changes location over time when compared with a reference point (or point of reference). Common reference points include: the Earth’s surface (GPS coordinates), nonmoving items on the Earth’s surface, such as buildings, trees and mountains, the elevator at school.

8. What is average speed?

9. Speed is
the rate an object moves over time…

10. How do we measure average speed?
Miles per hour = miles/hr Kilometers per hour = km/hr Meters per second = m/s

11. Average speed is measured:
by your distance (regardless of whether it is miles, kilometers, meters or feet) divided by time (regardless of whether it is hours, minutes or seconds). S = d/t

12. Practice calculating average speed
1. You have no ride but you are walking to North Gwinnett High for a basketball game. You start from your friend’s house which is 5 miles from the high school and you make it there in ½ an hour. What is your average speed?

13. Calculating average speed
Average Speed = distance divided by time. Average Speed = 5 miles/.5 hours Average speed = 10 miles/hour We could have measured speed in miles per minute but since we usually use miles per hour it makes more sense.

14. Practice calculating average speed
A bird flies at 15 m for 10 seconds, 20 m for 10 seconds and 25 m for 5 seconds. What is the bird’s average speed? Hint: First calculate his total distance. Then calculate his total time. Then divide.