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Welcome back to Class!
TOC – Describe Locations 10-29
How do you describe the location of an object?
• Choose an object in the classroom that is EASY to see.
• Do not point to, describe or name the object.
• Give specific directions in your science notebook .
• Ask your classmate to identify the object using your directions.
TOC- PHYSICS NOTES 10-29
•WRITE THE NOTES WRITE THE NOTES IN YOUR SCIENCE IN YOUR SCIENCE NOTEBOOK.NOTEBOOK.
POSITIONPOSITION
•Position- of a place or an object is the
LOCATION of that place or object.
IN YOUR SCIENCE NOTEBOOK DO THIS
ACTIVITY
• Using as many reference points as you can, tell me how to walk from your desk to the snack bar.
REFERENCE POINT
• A LOCATION TO WHICH YOU COMPARE OTHER LOCATIONS
• The illustration below during shows a ball at several positions its bounce.
If you were to watch it thrown you would see that the ball is in motion.
Motion- pg 9. in book• Motion is the change in position over
time. (glossary word)
• As the ball bounces both its horizontal and vertical positions change. (glossary word)
If you missed the bounce you would still know that motion happened. How? Because a change of position occurred. That is evidence of motion.
MOTION• A CHANGE IN AN OBJECT’S POSITION
TELLS YOU THAT MOTIONMOTION TOOK PLACE
• IT DOESN’T TELL YOU HOW QUICKLY HOW QUICKLY THE OBJECT CHANGED POSITION.
Relative Motion• If you sit still in your chair, you are not
moving. Or are you?
• You do not notice your position changing relative to everything else in the room.
• But if we could observe you from space, we could see that you are constantly changing positions with the Earth as it travels around the Sun.
Consider your car or bus ride to school…
An observer in the car would say that the stop sign changed positions and the car did not.
An observer by the sign would say that the car changed positions and the sign did not.
• Speed is a measure of how quickly or slowly an object changes position. (glossary word)
SPEED
• The greater the speed, the faster it changes position.
• Speed is the rate at which the distance an object CHANGES compared to time.
RATE• The way in which one
quantity (number) changes compared to another quantity (number) is called a rate
SPEED• Need to know distance and time
• Distance – meters, kilometers..most common
• Time- seconds, hours
• S= d/t
• Standard unit for speed is meters per second (m/s) or (km/hr)
AVERAGE SPEED
• Speed is not constant…when you run you speed up, slow down etc.
Lab Activity – Units for Certain Situations
Each of your teams is going to do 2 examples off of the table. Then we will fill in
the table together
Major Units•Liters- volume•Meters- distance•Grams- mass•On Learning Check
Situations and Units
SituationSituation UnitUnit ExplanationExplanation
Mass of a Car
Mass of a Person
Mass of a Sandwich
Mass of an insect
Mass of an Insect
Mass of a Planet
Mass of a Baby
Mass of a Ball of Clay
Mass of a Bike
Mass of a Penny
Mass of an elephant
Mass of an Airplane
Distance between 2 cities
Length of an ant
Height of a building
Length of a Car
Height of a Car
Height of a Horse
Volume of a Bathtub
Volume of a lake
Volume of a Shoe Box
Distance Between two kitchen tiles
Thickness of a paper clip
Height of a room
Width of a brick
Length of someone’s hair
Volume of a coffee mug
Volume of a medicine cup
Volume of a pop bottle