Forces on Objects
Which force pulls objects toward Earth?
A. Magnetism B. Gravity C. Friction D. Push
B. Gravity
Which force slows down moving objects when surfaces rub together?
A. Magnetism
B. Friction
C. Gravity
D. Electricity
B. Friction
Static electricity is caused by objects gaining or losing…
A. Energy
B. Electrons
C. Heat
D. Protons
B. Electrons
Which is a form of energy?
A. Heat
B. Sound
C. Light
D. All of the above
D. All of the above
For electricity to flow, a circuit must be…
A. Open
B. Closed
C. Broken
D. Disconnected
B. Closed
A force can make an object…
A. Only speed up
B. Only change direction
C. Speed up, slow down, or change direction
D. Stay still always
C. Speed up, slow down, or change direction
A stronger force will cause more…
A. Friction
B. Mass
C. Acceleration (change in motion)
D. Magnetism
C. Acceleration (change in motion)
What will happen when two objects with the same charge come near each other?
A. They attract
B. They repel
C. Nothing happens
D. They stick together
B. They repel
Energy that comes from moving particles causing temperature change is…
A. Electrical
B. Light
C. Thermal
D. Sound
C. Thermal
Which material is a good conductor of electricity?
A. Plastic
B. Wood
C. Rubber
D. Copper
D. Copper
Which situation shows an unbalanced force?
A. Two people pushing a box in opposite directions with equal strength
B. A book sitting on a table
C. A soccer ball rolling and coming to a stop
D. Two kids pushing a swing at the same speed
C. A soccer ball rolling and coming to a stop
If two forces act on an object in the same direction, the total force will…
A. Add together
B. Cancel out
C. Become zero
D. Freeze the object
A. Add together
A balloon sticks to a wall after being rubbed on hair because…
A. It gets heavier
B. It becomes magnetic
C. It has an electric charge that attracts the wall
D. The wall pushes the balloon
C. It has an electric charge that attracts the wall
Which example best shows electrical energy changing to light energy?
A. A microwave heats food
B. A lamp is turned on
C. A car engine runs
D. A drum makes a sound
B. A lamp is turned on
A switch in a circuit is used to…
A. Change energy into heat
B. Open or close the circuit
C. Increase voltage
D. Store electricity
B. Open or close the circuit
A force is a __________ or a __________ that can change an object’s motion.
push; pull
When equal forces act on an object from opposite directions, the forces are __________.
balanced
Opposite charges __________ each other, and like charges __________ each other.
attract.... repel
Energy cannot be created or destroyed; it can only be __________ from one form to another.
changed or transformed
Which part of a circuit is optional?
switch
What kind of force is responsible for the movement of a suitcase that is being dragged across a floor?
pulling force
What will happen to a ball hit with a greater amount of force compared to one hit with less force?
It will travel faster and farther
In order to move an aluminum can with a balloon WITHOUT touching it, how do the charges need to be?
same charges so they repel
What is a natural source of light energy?
sun or fire
Name the 3 parts a circuit has to have.
load/output/resistor, conductor (copper wire), power source (battery/electricity from an outlet)