welcome back to class!. toc – describe locations 10-29

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