Module #4 Classifying Matter And Its Changes

Question 1

Mixture

Answer 1

A substance that contains different compounds and/or elements

Question 2

Homogeneous mixture

Answer 2

A mixture with a composition that is always the same no matter what part of the sample you are observing

Question 3

Heterogeneous mixture

Answer 3

A mixture with a composition that is different depending on what part of the sample you are observing

Question 4

Chemical change

Answer 4

A change that affects the type of way f molecules or atoms in a substance

Question 5

Physical change

Answer 5

A change in which the atoms or molecules in any substance stays the same

Question 6

Pure Substance

Answer 6

A substance that contains only one element or compound

Question 7

What are the eight exceptions to the ‘elements and compounds’ rule?

Answer 7

N2, O2, Cl2, F2, Br2, I2, At2, and H2

Question 8

In the chemical equation: C +O2 = CO2, what are the reactants? What are/is the product(s)?

Answer 8

The reactants are C and O2. The product is CO2