NJASK REVIEW: Physical Science

All energy in weather comes ultimately from where?

• Mars
• the ocean
• Earth
• Sun

Soup is hot. Spoon is cold. What kind of energy transfer happens when the spoon is placed into hot soup?

• Conduction, because the spoon was in contact with the hot soup.
• Convection, because the spoon was in contact with the hot soup.
• Conduction, because warm soup currents warm the spoon. 
• Convection, because warm soup currents warm the spoon. 

Jack was rolling a matchbox car down a ramp. He was wondering, what would happen if the ramp were covered with different materials sand or glass, which would be the fastest ramp. What is the independent variable?

• the height of the ramp
• the surface of the ramp
• the height and length of the ramp
• the length of the ramp

Jack made a ramp for his match box car with books propping up the ramp. He was given the hypothesis: If the angle of the ramp were steeper, the car would roll further. What should be changed to best test this hypothesis?

• the height and length of the ramp
• the height of the ramp
• the roughness of the ramp surface
• the height of the ramp and the roughness of the ramp

Students performed a lab with a ramp, books, and a matchbox car. They were given a hypothesis: If friction increases, then the rolling distance of the car will decrease. What should be changed to best test this hypothesis?

• height of ramp
• length of ramp
• roughness of ramp
• height and roughness of ramp

When graphing data that changes over time, which type of graph should be used?

• bar graph
• circle graph
• picture graph
• line graph

When graphing an acceleration graph, the change of speed over time, what type of graph should be used?

• bar graph
• circle graph
• picture graph
• line graph

If an object is moving, it has which type of energy?

• chemical
• kinetic
• potential
• magical 

When a baseball is between the pitcher and batter, what type of energy does it have?

• chemical
• kinetic
• potential
• magical

When Wyle E. Coyote is waiting for the Road Runner with a huge boulder at the top of a cliff, which type of energy is being demonstrated?

• mechanical
• kinetic
• potential
• cartoon