General Terminology

Question 1

Hypothesis

Answer 1

a supposition or proposed explanation made on the basis of limited evidence as a starting point for further investigation

Question 2

Theory

Answer 2

a supposition or a system of ideas intended to explain something, esp. one based on general principles independent of the thing to be explained

Question 3

Law

Answer 3

a statement of fact, deduced from observation, to the effect that a particular natural or scientific phenomenon always occurs if certain conditions are present

Question 4

Mixture

Answer 4

a substance made by mixing other substances together

Question 5

Substance

Answer 5

a particular kind of matter with uniform properties

Question 6

Element

Answer 6

each of more than one hundred substances that cannot be chemically interconverted or broken down into simpler substances and are primary constituents of matter. Each element is distinguished by its atomic number, i.e., the number of protons in the nuclei of its atoms

Question 7

Compound

Answer 7

a thing that is composed of two or more separate elements; a mixture

Question 8

Density

Answer 8

the degree of compactness of a substance

Question 9

Mass

Answer 9

the property which reflects the quantity of matter within a sample

Question 10

Volume

Answer 10

the quantity of three-dimensional space occupied by a liquid, solid, or gas