Question

1. sorting: place in correct column (pure substance vs. mixture): gold, kool - aid, oxygen.

pure substances
a.
b.
mixture

1. fill - in - the - blank: elements are made up of only one kind of

1. short answer: how is a compound different from a mixture?

topic 4: hypothesis, theory, and law
study guide

• hypothesis: testable prediction,
• theory: explains why.
• law: describes what happens, often with math.
• note: theories can change; laws rarely change.

activities

1. multiple choice: which is a scientific law?

a) atomic theory explains atoms
b) gravity pulls objects down
c) scientists predict outcomes
d) molecules move faster when heated
answer:

1. fill - in - the - blank: a __ is a testable statement; a explains why; a __ describes what happens.

1. matching:

hypothesis → ____
theory → ____
law → ____
(choices: why, what, testable prediction)

1. true/false: a theory can never change. ____

1. short answer: give one scientific law and one theory.

1. application: write a hypothesis about mentos in soda.

Explanation:

Topic 4: Hypothesis, Theory, and Law - Activities

1. Multiple - Choice:

A scientific law describes what happens. Option a is a theory, option c is a general scientific activity, and option d is a description that can be part of a law but not as comprehensive as gravity pulling objects down. Gravity pulling objects down is a well - known scientific law.

Based on the definitions provided in the study guide, a hypothesis is a testable statement, a theory explains why, and a law describes what happens.

Using the definitions from the study guide, a hypothesis is a testable prediction, a theory explains why, and a law describes what.

Answer:

b) Gravity pulls objects down

1. Fill - in - the - Blank: