Physics (Ch2.1)

Question 1

What are the molecular arrangement of solids, liquids and gas?

Answer 1

Solid: Closely packed
Liquid: Closely packed
Gas: Far apart from each other

Question 2

What is the molecular movement of solids, liquids and gas?

Answer 2

Solid: Fixed in position, Vibrate about in fixed position
Liquid: Not fixed in position, Move around each other
Gas: Not fixed in position, Move freelyat high speeds in all directions

Question 3

The molecules in a body possess ______, so they are constantly in motion. The more______ the molecules possess, the faster they move.

Answer 3

kinetic energy

Question 4

The temperature of a body is a measure of the ______ kinetic
energy due to the ______ of the molecules in a body

Answer 4

Average
random motion

Question 5

Do molecules in a body at 0 degree celcius still have kinetic energy?

Answer 5

Yes

Question 6

What is the lowest temperature of kinetic energy of molecules?

Answer 6

-273 degree celcius
Absolute zero

Question 7

The internal energy of a body is the total amount of the ___ stored in the body.

Answer 7

molecular energy

Question 8

How is internal energy measured?

Answer 8

Joules (J)

Question 9

Does the total internal energy change with temperature and mass of the body?

Answer 9

yes

Question 10

Heat is the energy transferred from one body to another as a result of a _______.

Answer 10

temperature difference

Question 11

The rate of energy transfer depends on the temperature
difference. The larger the temperature difference, the____the rate.

Answer 11

higher

Question 12

Heat flows naturally from _____ bodies to ______ones.
The energy transfer stops when they reach the same temperature. In this
state, they are said to be in ______.

Answer 12

High-temperature
Low-temperature
thermal equilibrium

Question 13

Beside heating, how can we increase the internal energy of the body?

Answer 13

Doing work