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A chemist mixes sodium with water and witnesses a violent

Chapter 1, Problem 1SAQ

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QUESTION:

A chemist mixes sodium with water and witnesses a violent reaction between the metal and water. This is best classified as

a)        an observation.

b)        a law.

c)        a hypothesis.

d)        a theory.

Questions & Answers

QUESTION:

A chemist mixes sodium with water and witnesses a violent reaction between the metal and water. This is best classified as

a)        an observation.

b)        a law.

c)        a hypothesis.

d)        a theory.

ANSWER:

Step 1 of 2

* An observation is the chemist process and observes what happens.

* A law summarizes many past observations and predicts a future behaviour.

* A hypothesis is a proposed explanation for an observation. Hypothesis is tested by a number of experiments and new observations are collected.

* A theory explains what happens and why and it explains clearly how things work.

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