PE/KE
What is Kinetic energy?
energy from something that is moving
6. If you were able to see what was happening with the molecules of two liquids with different thermal energies, what would you see?
The molecules would be moving faster in the liquid with less thermal energy.
The molecules of each liquid would be exactly the same.
There would be fewer molecules in the liquid with more thermal energy.
The molecules would be moving faster in the liquid with more thermal energy.
The molecules would be moving faster in the liquid with more thermal energy.
A liquid sample of gold metal is heated. As the gold’s temperature continues to increase, what will eventually happen to the gold?
The gold will become a solid.
The gold will boil and become a gas.
Nothing will change about the gold.
The gold will change into another metal, such as iron.
The gold will boil and become a gas.
What are the three states of matter?
Solid liquid gas
Which factor can have the greatest effect on increasing the potential energy of an object?
Increasing the object’s velocity.
Changing the object’s volume.
Changing the object’s position.
Increasing the object’s speed.
Changing the object’s position.
What changes about an object when it melts?
The number of molecules in the object increases.
The number of molecules in the object decreases.
The thermal energy of the object decreases.
The thermal energy of the object increases.
The thermal energy of the object increases.
What occurs as a substance is converted from a gas to a liquid?
The types of atoms in the substance change.
Nothing changes, the substance is exactly the same at the molecular level.
The temperature of the substance increases.
The temperature of the substance decreases.
The temperature of the substance decreases.
What are the three types of heat transfer?
convection, conduction, and radiation
4. When riding a skateboard down a ramp, how do potential and kinetic energy change?
Potential and kinetic energy both decrease as you move downhill.
As you move down the ramp, kinetic energy increases and potential energy decreases.
As you move down the ramp, kinetic energy decreases and potential energy increases.
Potential and kinetic energy both increase as you move downhill.
As you move down the ramp, kinetic energy increases and potential energy decreases.
8. When you touch a piece of metal that is at room temperature, it feels cold. When you touch a piece of wood at room temperature, it doesn’t feel cold. Why?
Thermal energy moves more easily through the metal.
The metal has more thermal energy.
The wood has more thermal energy.
Thermal energy moves more easily through the wood.
Thermal energy moves more easily through the metal.
When you go to the beach, you noticed that the sand is hot, but the water is cold. Both have been sitting in the sun for a long time. The two materials are different temperatures because:
The water needs more energy to get hot than the sand does.
Sand heats up more slowly than water.
Sand has a higher specific heat than water.
Sand takes in more energy than water.
The water needs more energy to get hot than the sand does.
What is gravitational potential energy?
PE that is caused by gravity, rock falling to the ground
5. Which object will have the greatest amount of potential energy?
A rock laying on the ground.
A car nearing the bottom of a downhill segment of road.
A diver on a high platform.
A burning fire.
A diver on a high platform.
9. What is the difference between an insulator and a conductor in terms of thermal energy?
Insulators always have more thermal energy.
Conductors always have more thermal energy.
Thermal energy travels more easily through an insulator.
Thermal energy travels more easily through a conductor.
Thermal energy travels more easily through a conductor.
What is the biggest difference between thermal energy and temperature?
Temperature tells you how hot something is, and thermal energy tells you how cold something is.
Thermal energy tells you the average energy of the particles, and temperature tells you the total energy of the particles.
Thermal energy tells you the total energy of the particle, and temperature tells you the average energy of the particles.
Thermal energy tells you how hot or cold something is, and temperature tells you that thermal energy is moving.
Thermal energy tells you the total energy of the particle, and temperature tells you the average energy of the particles.
How does heat move?
From Hot 2 Cold
What is elastic potential energy?
PE cause by the stretching of an elastic material, ex rubber band or bow string
If an ice cube is added to a warm drink, what changes about thermal energy of the molecules in the ice cube and drink?
The molecules in the ice cube will move more slowly after it is added to the drink.
The molecules in the drink will move faster after the ice cube is added.
Thermal energy will be transferred from the ice cube to the drink.
Thermal energy will be transferred from the drink to the ice cube.
Thermal energy will be transferred from the drink to the ice cube.
What does it mean to have a low specific heat or low heat capacity?
Less energy needed to warm a substance up
What is the definitions of convection, conduction and radiation?
Conduction heat by touch, convection heat by hot air/liquid rising, Radiation is heat by waves