Physical And Chemical Changes

Question 0

Chemical change? Ex?

Answer 0

When a new substance is formed. Ex: burning paper

Question 1

What is a physical change? Example?

Answer 1

When some of the properties of a material change, but substances stay the same. Ex: cutting paper

Question 2

What type of matter consists of 2 or more substances that are NOT chemically combined?

Answer 2

Mixtures

Question 3

Substances that CANNOT be broken down into more simple substances are called ____

Answer 3

Elements

Question 4

The force of gravity on another object is called ___

Answer 4

Weight

Question 5

Quantity of matter in an object____

Answer 5

Mass

Question 6

SI unit for mass?? __

Answer 6

Kilograms

Question 7

Measurement of how much mass is contained in a given volume is called ___

Answer 7

Density

Question 8

Density =

Answer 8

Mass/Volume

Question 9

Smallest particle of an element __

Answer 9

Atom

Question 10

•definite shape
•definite volume
•particles packed tight
Are properties of a ___

Answer 10

Solid

Question 11

• no def. shape
• def. volume
• particles are free to move around in given space

Answer 11

Liquid

Question 12

Resistance to a liquid flowing:

Answer 12

Viscosity

Question 13

• no def. shape
• no def. volume
• particles are free

Answer 13

Gas

Question 14

Amount of space that a gas takes up:

Answer 14

Volume

Question 15

Result of force distributed over an area ___

Answer 15

Pressure

Question 16

According to Boyles law, when the pressure of a gas increases at constant temp., it’s volume ____

Answer 16

Volume decreases

Question 17

What happens to pressure when the speed of gas particles increase?

Answer 17

Pressure increases

Question 18

When the temp. of a gas decreases at a constant volume, it’s pressure____

Answer 18

Pressure decreases

Question 19

Volume of a gas is directly proportional to it’s temp. In kelvins if the pressure and # of particles of the gas are constant is___

Answer 19

Charles Law

Question 20

Temp at which a substance melts

Answer 20

Melting

Question 21

Solid>gas is __

Answer 21

Sublimation

Question 22

Liquid > gas

Answer 22

Vaporization

Question 23

Gas> liquid

Answer 23

Condensation

Question 24

Total potential and kinetic energy of all the microscopy particles in an object is ___

Answer 24

Thermal energy

Question 25

Thermal energy alway flows from a __ object to a ___ object

Answer 25

Hot; cold

Question 26

Which state of matter would have the least amount of thermal energy?

Answer 26

Solid

Question 27

Ice melts as a result of energy flowing from where?

Answer 27

Warm air surrounding the ice

Question 28

If a gas is in an expandable container is heater, the volume of the container would___

Answer 28

Increases