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WorksheetsUnit 2 Energy
Total questions: 28
Worksheet time: 24mins
Engineers studying the effects of collisions on automobile frames observed that a collision between a car and a steel post caused a small amount of damage when the car was moving at 2.0 m/s but significant damage when the car was moving at 10 m/s. What change in the collision explains the difference in damage to the car?
The car that was moving faster had more kinetic energy.
There was more friction between the car and the post at the higher speed.
Joelle noticed that when she uses the brakes on her bicycle while she is traveling at a slow speed, she stops moving immediately. When she is riding much faster, it takes more time for the bike to come to a stop after she applies the brakes. Which is the BEST explanation for this observation?
Moving at higher speeds increases the mass of the bike so it require more energy to stop its motion.
Joelle and her bike have more kinetic energy at higher speeds.
A student pushed a rock from the top of the hill. What type of energy change occurred after the rock was pushed?
Kinetic energy was converted to electrical energy
Potential energy was converted to kinetic energy
A roller coaster is climbing up the highest hill on its track. At which point will the front car of the coaster MOST likely have its greatest potential energy?
At the bottom of the highest hill
At the top of the highest hill
What is the difference between potential energy and kinetic energy?
Potential energy is the energy of an object due to its position, while kinetic energy is energy due to its motion.
Potential energy is the energy of an object due to an applied force, while kinetic energy is energy stored after the applied force.
The sun produces energy through
Chemical reactions
Nuclear fusion
A ball rolls across the floor and slows down to a stop. Which force caused the ball to slow down?
Gravity
Friction
How does potential energy transfer to kinetic energy?
Potential energy cannot become kinetic energy.
When an outside force acts upon the object and causes it to move.
What is the correct energy transformation in a hot air balloon?
Chemical>Thermal>Kinetic
Kinetic>Mechanical>Light
What is the correct energy transformation in a flashlight?
Electrical>Mechanical>Light
Chemical>Electrical>Light
What kind of energy do you experience when you eat a peanut butter and jelly sandwich?
Mechanical
Chemical
When you stretch a rubber band, you give it
Gravitational potential energy
Elastic potential energy
The energy stored in the nucleus of an atom is called
Electromagnetic energy
Nuclear energy
Scientists are studying a pond. Which property can the scientists measure to understand the amount of energy held by the lake water?
The depth of the lake
The temperature of water
Joshua’s calculator has a solar panel. The solar panel collects energy to power the calculator. Which energy source does this calculator use?
A battery source
A light source
A thermometer is BEST used to measure
Kinetic Energy
Potential Energy
Which is form of energy that is caused by movement of atoms and molecules in a substance?
Heat
Solar
Isabella filled a glass with warm water. She measured the temperature, and it was 30*C. She left the glass on a table in a room that was 20*C. A few hours later, she measured the water temperature again, and it was 24*C. Which BEST explains why the water temperature changed?
Heat energy in the water was destroyed by the glass.
Heat energy in the water was transferred to the cooler air.
A pot is touching the flame of a gas stove, and the substance in the pot is heating up due to the contact. This is an example of which type of energy transfer?
Radiation
Conduction
Convection
Hot objects begin to cool as
Energy in the object is transferred to the surrounding air.
Atoms in the object react with the oxygen in the air.
Miranda wraps her hands around a warm mug of hot tea. The hot tea is being transferred to Miranda’s hands by
Convection
Conduction
A student is mixing up a cup of hot chocolate with a spoon. How is the heat transferred between the hot chocolate and the part of the spoon that is in the hot chocolate?
Convection transfers energy from the spoon to the hot chocolate
Conduction transfers energy from the hot chocolate to the spoon.
Students study how the temperature of a substance is related to the rate of molecular movement. The molecules in which substance are moving the fastest?
Cold milk
Steam rising from boiling water
Energy from the Sun reaches Earth by
Thermal expansion
Radiation
If two objects are the same temperature, would there be any heat transfer?
No
Yes
A wood burning stove is used to heat the air in a small cabin. What types of heat transfer are involved?
Radiant and convection
Radiant and conduction
A metal container on the stove gets hot by
Refraction of heat energy
Conduction of heat energy
Which statement correctly describes the function of a heater in a house?
It uses energy to move cold in order to a cool a room.
It uses energy to move heat from one place to another in order to heat or cool a room.
