Physical Vs Chemical Change

Question 1

How is physical change different from chemical change?

Answer 1

Chemical change forms a new substance while physical change is the same substance but in a different state

Question 2

Physical properties

Answer 2

Characteristics of substance that can be observed with the senses and measured without changing identity of substance

Question 3

Solubility

Answer 3

Ability of substance to dissolve in another substance

Question 4

Ductility

Answer 4

Solid that can be stretched into a long wire

Question 5

Conductivity

Answer 5

Ability to conduct heat or electricity

Question 6

Density

Answer 6

Amount of mass in given volume

Question 7

Viscosity

Answer 7

Resistance to flow

Question 8

Melting/boiling point

Answer 8

Temperature at which a substance changes state

Question 9

Transparent

Answer 9

Allows light through

Ex. Glass

Question 10

Translucent

Answer 10

Allows some light through

Ex. Tinted windows

Question 11

Opaque

Answer 11

Allows no light through

Ex. Binder

Question 12

What are 5 signs of a chemical change?

Answer 12

1. Colour change
2. Bubbles of gas form
3. Gives off heat or light
4. Difficult to reverse
5. Precipitate