Bellwork Quiz 3 Flashcards
Students learned objects can exert forces on each other without touching. 3 investigations support what they learned.
A. Measuring how close a soda can be before it rolls toward a static balloon.
B. Counting the # of staples attached to the magnet (using magnetic force).
C. Dropping a rubber ball from a distance of 1.5 meters above the floor.
D. Placing a magnet against a jar containing a mixture of iron fillings and sand.
E. Measuring how far a car travels across the floor before stopping.
A, C, D
Mass was added to the block on a pulley system connected to a wooden model car. What happens?
A. The car’s speed slowly increased.
B. The car moved right away.
C. The car doesn’t move.
B
Atoms contain…
Protons, Neutrons, and Electrons
The law of electric charges tells us what?
Like charges repel and opposite charges attract.
2 things that affect the size of the electric forces.
Amount of charge & Distance between charges
What is an electric field?
Area around a charged object where electric forces can be exerted on another object.
Based on the diagram, how will the charges move?
(Proton) (Proton)
Away from eachother
How do electric fields interact?
When charged particles are close enough to exert a force on each other, their electric fields interact. Like charges repel and opposite charges attract.
3 ways to charge an object
Friction, Conduction, Induction
What are conductors?
A type of material that electricity can move through easily.
What are insulators?
A type of material that electricity cannot move through easily. (Stops electricity from going anywhere else)
Example of a conductor and insulator.
C: Copper/Metals
I: Plastic
