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A force that pulls objects toward each other
Attract
I am a ______ because I have a North Pole and South Pole
Magnet
Are magnets attracted to plastic? Wood?
No!
When closing a closet, what motion/direction do I move in?
Push- I push the closet closed.
DOUBLE JEOPARDY!!! a force that pushes an object back or away
Repel
What is repetitive motion?
When an object moves in a pattern that is easy to predict the next direction it will move in- the motion keeps repeating.
What are the two poles a magnet has?
North and south
DOUBLE JEOPARDY!!! A force that pulls an object down, the force that pulls all objects toward each other
Gravity
Something that causes a change in the motion (speed or direction) of an object
Force
DOUBLE JEOPARDY!!! I have unequal force on each side, what force am I? ________
Unbalanced force
DOUBLE JEOPARDY!!! Force between two objects rubbing against each other that resists the movement. Example: rubbing balloon against hair
Friction
DOUBLE JEOPARDY!!! Will North and South poles of a magnet attract?
Will south and north poles of a magnet attract?
Yes! Opposites attract.
Will North and North or South and South poles of a magnet attract?
No, because same poles (sides) repel
What is an electromagnet?
A magnet that requires power to work!
Are electromagnets attracted to the same materials as permanent magnets?
Yes! Magnets are all attracted to the same materials (ferromagnetic metals)
What are ferromagnetic materials?
Iron, nickel, cobalt, steel
Imagine: you are watching an arm wrestle, one side exerts a greater force than the other, is this a balanced force?
No! It’s unbalanced because there are unequal forces.
A magnet does not have to be _______ something to exert force on it
Touching
Imagine: you are watching a tug of war game, the rope is NOT pulling to one side or the other. What kind of force is this?
Balances force! There is equal force from both sides, so the rope is not being pulled to one side.
Forces that are equal in size but opposite in direction (they do not cause a change in motion)
Balanced forces
What is an example of an electromagnet?
Possible answer: Crane
What is an example of repetitive motion
Possible answers: swing, seesaw, jump rope, tether ball.
DOUBLE JEOPARDY!!! What is a permanent magnet?
Is an electromagnet a temporary or permanent magnet?
Temporary because it needs to be turned on to work.
DOUBLE JEOPARDY!!! What is an example of a permanent magnet?
Possible answer: refrigerator magnet