Question 1

Which of the following are properties of a theory? Select all that apply.

Question 1 options:

	Applies to a single or small number of experiments
	Describes why or how something happens
	Is widely accepted by the scientific community
	Describes what happens

Question 2

Hypotheses can be revised or rejected based on experimental evidence.

Question 2 options:

	True
	False

Question 3

Identify the following statements as being most similar to an observation, a hypothesis, a law, or a theory.

A student in laboratory records the qualitative data that nickel has a silvery sheen.

Question 3 options:

	Observation
	Hypothesis
	Law
	Theory

Question 4

Which of the following are properties of a liquid? Select all that apply.

Question 4 options:

	Has a definite shape
	Has a definite volume
	Can be compressed
	Can flow

Question 5

Atoms within gases are far apart and only occasionally collide.

Question 5 options:

	True
	False

Question 6

Determine if each of the following is a pure element, pure compound, homogeneous mixture, or heterogeneous mixture.

1. TiS₂

2. Sand

Question 6 options:

Question 7

Student C and Student D both measure the mass of an Erlenmeyer flask using a balance. The true mass of the flask is 655.0 g.

Student C records a mass of 635.2 g.

Student D records a mass of 660.5 g.

Which student's measurement is more accurate?

Question 7 options:

	Student C
	Student D

Question 8

When adding or substracting two numbers, the number of significant figures of the resulting value has the same number of decimal places as the original value with the greatest number of decimal places.

Question 8 options:

	True
	False