week 1, concept 2 : Terminology

Question 1

definition -

matter

Answer 1

anything that occupies space and has mass

Question 2

matter is physically separable into _

Answer 2

pure substance

and

mixtures

Question 3

Definition -

pure substance

Answer 3

• fixed composition
• cannot be further purified

Question 4

pure substances are_

Answer 4

• elements
• compounds (elements united in fixed ratios)

Question 5

elements cannot be_

Answer 5

• subdivided by chemical or physical means

Question 6

definition-

compound

Answer 6

• A pure substance
• that is made up of two or more elements in a fixed ratio by mass.

Question 7

definition-

mixture

Answer 7

• a combination of 2 or more pure substances

Question 8

Homogeneous matter =

Answer 8

• uniform composition throughout (mixture)
  (ie. sugar in water, salt water)

Question 9

Heterogeneous matter =

Answer 9

• non uniform composition
  (ie. sand and wate, or blood)

Question 10

definition-

element

Answer 10

• A substance (for example, carbon, hydrogen, and iron) that consists of identical atoms.