ConceptualPhysics-Heat,Temperature,andEnergy

Question 1

When substances heat up, what happens to their molecules?

Answer 1

They begin to move faster and farther apart.

Question 2

What is absolute zero?

Answer 2

The temperature at which all molecular motion ceases- -273 degrees Celsius or 0 Kelvin

Question 3

What is heat?

Answer 3

The energy contained in an object because of its moving molecules.

Question 4

What is temperature?

Answer 4

The measurement of the speed of molecules’ movement in a substance.

Question 5

When two objects of different temperatures are placed near each other, what will happen to their temperatures? What is this called?

Answer 5

Their temperatures will gradually become equal. This is called thermal equilibrium.

Question 6

Is there more heat in an iceberg or a pot of boiling water?

Answer 6

An iceberg. The sheer number of molecules in an iceberg outweighs the high temperature in a pot of boiling water.

Question 7

Is there more heat in a cup of ice or a cup of boiling water?

Answer 7

Boiling Water.

Question 8

What creates heat?

Answer 8

When molecules become active.

Question 9

What happens to the temperature when molecules move faster?

Answer 9

it increases

Question 10

How does a thermometer work?

Answer 10

Mercury or alcohol is sealed in a glass tube. If it becomes hot, the liquid expands, showing the temperature “going up”. When it becomes colder, the liquid shrinks, showing the temperature “going down”.

Question 11

What is energy?

Answer 11

what makes matter move or change; the ability to do work

Question 12

Name a form of potential energy (one).

Answer 12

a bow-string pulled back; a stretched rubber band; food; water lifted up (above a generator/propellor); a wrecking ball pulled back before a swing.

Question 13

Name a form of kinetic energy (one).

Answer 13

Arrow moving through are; launched rubber band; water falling through a turbine; a wrecking ball swinging

Question 14

Name a source or mechanical energy (one).

Answer 14

wind; moving water

Question 15

What type of energy is stored in food?

Answer 15

chemical energy

Question 16

What type of energy is generated when atoms cause heat?

Answer 16

nuclear energy (or thermal…)

Question 17

Define Heat/Thermal Energy.

Answer 17

total of all kinetic energy in particles of a substance

Question 18

Define kinetic energy

Answer 18

the energy of movement

Question 19

Define temperature

Answer 19

A measure of the average kinetic energy of particles.

Question 20

which has a higher temperature? One gallon of water at 70 degrees Fahren. or Two gallons of water at 70 degrees Fahren.?

Answer 20

Niether!!! They have the same temperature, so obviously THEY HAVE THE SAME TEMPERATURE!!!

Question 21

Which contains more heat? One gallon of water at 70 degrees Fahren or two gallons of water at 70 degrees Fahren.?

Answer 21

Two gallons because if they have the SAME TEMPERATURE, just look at the VOLUME. (and if they have the SAME VOLUME, just look at the TEMPERATURE). If they are both the same, THE HEAT AND TEMPERATURE ARE BOTH THE SAME TOO!!!!!

Question 22

Which has particles that are moving faster: One gallon at 70 degrees F; Two gallons at 70 degrees F; or Two gallons of water at 80 degrees F?

Answer 22

C.! When all the question cares about is speed of movement, go to the MEASUREMENT of speed of movement: TEMPERATURE! That’s ALL that matters (in this case).