test prep assignment 1

Question 1

the statement “the worm is 2 cm long” is a(n)

a. quantitative observation
b. qualitative observation
c. inference
d. hypothesis

Answer 1

A

Question 2

an inference is

a. same as an observation
b. a logical interpretation of an observation
c. a statement involving numbers
d. a way to avoid bias

Answer 2

B

Question 3

to be useful in science a hypothesis must be

Answer 3

testable

Question 4

term spontaneous generation means that

Answer 4

living things can arise from nonliving things

Question 5

a scientific theory is

Answer 5

a well tested explanation that unifies a broad range of observations

Question 6

controlled experiments

Answer 6

only one variable is tested at a time

Question 7

the positively charged particle in an atom is the

Answer 7

proton

Question 8

two or more different atoms are combined in definite proportions in any

Answer 8

compound

Question 9

a covalent bond is formed by the

Answer 9

sharing of electrons

Question 10

when you shake sugar and sand together in a test tube, you cause them to form a

Answer 10

mixture

Question 11

a compound that produces hydrogen ions in a solution is a(n)

Answer 11

acid

Question 12

in polymerization, complex molecules are formed by the joining together of

Answer 12

monomers

Question 13

proteins are polymers formed from

Answer 13

amino acids