Thermal Energy and Heat

Question 1

What is TE?

Answer 1

The total kinetic energy in the particles of an object

Question 2

In the SI system, TE is measured in _________.

Answer 2

Joules

Question 3

Temperature is NOT energy, but it does give the measure of the __________________________________________

Answer 3

Average KE of the particles in an object

Question 4

Anything at a higher temperature will have a __________ TE

Answer 4

Higher

Question 5

Why are temperature and TE different?

Answer 5

Temperature is related to the average KE in the particles of an object, while TE is the total KE of all the particles in an object

Question 6

Glass of water can have the same temperature as a lake, but the lake has more TE, why?

Answer 6

Bcuz the lake has more molecules

Question 7

Which has more TE, a bowl of soup or a pot?

Answer 7

A pot of soup

Question 8

Does heat only have to do with things that are hot?

Answer 8

No also with cold stuff

Question 9

In science, what is heat?

Answer 9

The energy transferred from an object at a higher temperature to an object with lower temperature

Question 10

When 2 objects come in contact, energy will always be transferred from the object with __________ temperature to the object with __________ temperature.

Answer 10

Higher -> lower

Question 11

How many ways are there to measure heat?

Answer 11

2

Question 12

What are the two ways to measure heat?

Answer 12

calories, and joules

Question 13

One calorie is equal to …

Answer 13

The amount of energy needed to raise the temperature of 1g of water by 1^C

Question 14

1 calorie = ? joules

Answer 14

4.18 joules

Question 15

One Calorie = ___ calorie(cal)

Answer 15

1000

Question 16

A kilocalorie is written with a ______ “C”

Answer 16

Capital

Question 17

1 Calorie contains enough energy to raise the temperature of _____ of water 1^C

Answer 17

1KG

Question 18

What instrument is used to measure how many calories are in an object is called a ____________

Answer 18

Calorimeter

Question 19

A thermometer measures increase in temperature, which is used to calculate how much energy is ___________. This is the amount of __________

Answer 19

Released; Calories

Question 20

Adding or removing _____ from a substance will affect its temperature and TE.

Answer 20

Heat

Question 21

What happens when 2 objects at different temperatures come into contact?

Answer 21

Energy as heat flows from the object at the higher temperature to the object with a lower temperature. When both objects become the same temperature no more energy as heat flows

Question 22

What does the Kinetic theory of matter state?

Answer 22

Particles that make matter move around at different speeds.

Question 23

What does the state of a substance depend on?

Answer 23

The speed of its particles

Question 24

What can adding energy in the form of heat to an object result in?

Answer 24

Change of state

Question 25

What can added energy cause?

Answer 25

Bonds between particles to break. *This is what allows state to change*

Question 26

What are the 3 main ways to transfer energy?

Answer 26

Conduction, convection, radiation

Question 27

What is conduction?

Answer 27

The transfer of energy as heat from one substance to another through direct contact

Question 28

When can conduction occur?

Answer 28

Anytime two objects with different temperatures come into contact

Question 29

If two objects with different temps are in contact, when will conduction stop?

Answer 29

When both of the objects have come to the same temperature

Question 30

How does conduction occur in one object?

Answer 30

Energy in the form of heat is transferred from the warmer part of the object to the colder part, until the entire object is the same temperature

Question 31

What is a conductor?

Answer 31

A material that transfers heat very well.

Question 32

What are examples of good conductors?

Answer 32

Metals

Question 33

What is an insulator?

Answer 33

A material that is a poor conductor of heat

Question 34

What are examples of good insulators?

Answer 34

Wood, plastic, plastic foam.

Question 35

Why is plastic foam a good insulator?

Answer 35

Bcuz it contains many small spaces that are filled with air.

Question 36

What is it called when heat is transferred through the movement of liquids and gases?

Answer 36

Convection

Question 37

What is convection?

Answer 37

The transfer of energy as heat by the movement of a gas or liquid.

Question 38

As temperature increases, the density of the liquid or gas ____________.

Answer 38

Decreases

Question 39

When does convection occur?

Answer 39

When a cooler, denser, mass of a gas or liquid replaces a warmer, less dense mass of a gas or liquid by pushing it upwards

Question 40

When u boil water in a pot, what does convection cause?

Answer 40

The water to move in roughly circular patterns

Question 41

What is radiation?

Answer 41

The transfer of energy by electromagnetic waves

Question 42

What are examples of radiation?

Answer 42

Visible light, microwave, and infrared lights

Question 43

What is the most significant source of radiation?

Answer 43

The sun