1. 8th Grade – Science Al-Ghazaly School
Motion 
8th Grade – Science
Al-Ghazaly School

2. Reference point
Position
Motion
Distance
Displacement

3. Explain your understanding of a Reference point
Objectives
Define Motion
Explain your understanding of a Reference point
What is the standard unit used to measure distances?

4. International System of Units
Key words and terms
Motion
Reference point
Distance
International System of Units

5. When is an object in Motion?
An object is in motion if its position changes relative to another object.

6. Reference point
A place or object used to determine if something is in motion. Eg: a tree or building

7. Distance and displacement
Distance: The length of the path between two points Displacement: the difference between the initial position and the final position of an object

8. What is distance?
Distance is the measure of how far it is from one point to another. The international system of units measures distance in centimeters, meters and kilometers. A B

9. International System of Units: Meters (M)
Measuring distance
International System of Units: Meters (M)

10. Conclusion
An object is in motion if it changes position relative to a reference point.
A reference point is a place or object used for comparison to determine if something is in motion.
To determine motion for an object moving on or near Earth’s surface, a reference point that is fixed to Earth, such as a building or tree, is usually used.

11. Questions Which is not an SI base unit? Kilogram Mile Meter Second
When is an object said to be in motion?
Define Reference Point
If you walk 2km from your home to a store and then back home, what is your displacement?