A
A push or pull on something.
force
Mrs. Beauchamp rolled a marble across the floor to Mrs. Watson What force started the ball rolling? (balanced force, unbalanced force, gravity, friction)
unbalanced force
A student wants to recover dissolved salt from salt water. Which process is most useful?
A. Use a magnet.
B. Let the water evaporate.
C. Pour through a large strainer.
D. Add more salt.
B. Let the water evaporate.
A student builds two circuits using identical batteries and bulbs. Circuit 1 has a complete loop. Circuit 2 has a loose wire disconnected from the bulb. What will happen?
A. Both bulbs light.
B. Only the bulb in Circuit 1 lights.
C. Only the bulb in Circuit 2 lights.
D. Neither bulb lights.
B. Only the bulb in Circuit 1 lights.
A student tests four objects. Which property can be used to identify a metal paper clip?
A. It is attracted to a magnet.
B. It dissolves in water.
C. It is transparent.
D. It floats on water.
A. It is attracted to a magnet
A circuit contains a battery, wires, a switch, and a bulb. The bulb does not light when the switch is open. Why?
A. The open switch breaks the path for electric current.
B. The battery becomes a magnet.
C. The bulb uses no electrical energy when connected.
D. The wires change into insulators.
A. The open switch breaks the path for electric current.
Two students push a box in opposite directions. Student A pushes right with 15 N. Student B pushes left with 10 N. What is the net force?
A. 5 N to the right
B. 5 N to the left
C. 25 N to the right
D. 25 N to the left
B. 5 N to the left
Which mixture is most likely to be a solution?
A. Pebbles and sand
B. Oil and water in separate layers
C. Sugar completely dissolved in tea
D. Cereal pieces in milk
C. Sugar completely dissolved in tea
An oven mitt is used as a______ to prevent injury while cooking. ( insulator, conductor)
insulator
A student pours 50 mL of water into a graduated cylinder and adds a rock. The water level rises to 68 mL. What is the volume of the rock?
A. 18 mL
B. 50 mL
C. 68 mL
D. 118 mL
A. 18 mL
A student connects a battery, wires, and a bulb in a complete loop. Which energy change occurs in the bulb?
A. Electrical energy changes to light and thermal energy.
B. Light energy changes to stored chemical energy.
C. Sound energy changes to electrical energy.
. Electrical energy changes to light and thermal energy.
A toy car rolls across a smooth floor and then a rough carpet. It slows down on the carpet. Which force most directly causes the change?
A. Magnetism
B. Friction
C. Light
D. Electricity
B. Friction
A student pushes an empty shopping cart and then a loaded cart with the same force. The loaded cart speeds up less. What is the best explanation?
A. The loaded cart has more mass.
B. The loaded cart has no friction.
C. The empty cart has more gravity.
D. The loaded cart has no inertia.
A. The loaded cart has more mass.
A student wants to turn a flashlight bulb on and off without removing the battery. Which component should be added to the circuit?
A. A switch
B. A plastic cup
C. A second bulb without wires
D. A magnet outside the circuit
A. A switch
A student measures two cubes of equal size. Cube X has a mass of 20 g, and cube Y has a mass of 35 g. Which statement is supported?
A. Cube X has more mass.
B. Cube Y has more mass.
C. Both cubes have the same mass.
D. Cube Y has a greater volume.
B. Cube Y has more mass.
An object that is not already moving will begin to move in the direction of the larger force.
unbalanced Forces
A student releases a ball at the top of a ramp. The ball rolls downward. Which force pulls the ball toward Earth?
A. Gravity
B. Magnetism
C. Static electricity
D. Applied force from a hand
A. Gravity
A student mixes gravel and water. Which method will most effectively separate the gravel from the water?
A. Freeze the mixture.
B. Use a screen or strainer.
C. Add more water.
D. Stir the mixture quickly.
B. Use a screen or strainer.
Which material would be the best choice for carrying electric current between a battery and a bulb?
A. Copper wire
B. Plastic string
C. Rubber band
D. Wooden stick
A. Copper wire
A student compares four materials. Which observation best describes solubility?
A. A nail is pulled by a magnet.
B. Sugar disappears into water after stirring.
C. A rubber band stretches.
D. A coin sinks in water.
B. Sugar disappears into water after stirring.
This exists when all the forces acting on an object result in the object staying at rest or moving at a constant speed in the same direction.
balanced force
Mrs. Beauchamp's 5th grade class and Ms. Cupp's 5th grade class challenged each other to a game of tug-of-war. Each class grabbed onto different ends of the long rope. Coach Rodriguez blew a whistle and both teams began to pull and pull. Neither team could pull the other team over. Give a statement about the forces involved in the tug-of-war between the two classes. "The forces were ___________ because the teams could not pull each other over."
Balanced
A student adds salt to a cup of water and stirs until the salt is no longer visible. What has formed?
A. A solution
B. A new element
C. A pure solid
D. A gas
A. A solution
Matter that allows electricity to pass through it easily is called an
electrical
conductor
. A student mixes sand and iron filings. Which tool is most useful for separating the iron filings from the sand?
A. A magnet
B. A thermometer
C. A ruler
D. A flashlight
A. A magnet