describes what is happening, but not why

is a societal rule we must obey

explains why criminals break laws

What is the Law of Conservation of mass?

Mass is never created or destroyed

Mass is created in a chemical reaction

Mass is created in a physical change

New chemicals formed from a chemical reaction have a larger overall mass than the original reactants

In 1897, Joseph Thomson discovered that atoms contained electrons. He proposed a change in the atomic theory of that time, and the theory was modified because of his discovery. Since Thomson’s discovery, atomic theory has been further modified. What is the best explanation for why scientific theories are modified?

New evidence that supports a change prompts scientists to modify earlier theories.

Theories more than ten years old are usually out of date.

Scientists want to prove that the work of other scientists is wrong.

So much information is available today that it is harder to focus research and disprove theories.

Lilly was trying to explain to her friend the difference between a theory and a law in science. She used the theory of plate tectonics and the law of superposition as examples. Lilli explained the difference by using non-scientific language. Which statement could Lilly use to correctly describe the difference between a theory and a law in science?

A theory explains a natural event, while a law describes it.

A theory describes a natural event, while a law explains it.

A theory explains a natural event, while a law predicts it.

A theory predicts a natural event, while a law explains it.

Before a scientific theory is accepted and supported, it has

been tested many times by different scientists.

been tested by only one scientist.

been published in scientific journals.

been approved by the International Committee of Scientists.

Scientific Law vs Theory

Quiz

•

Science

•

6th - 8th Grade

•

Practice Problem

•

Medium

•

NGSS

HS-ESS1-2, HS-PS1-2, HS-PS2-1

+27

Standards-aligned

My Taylor

Used 14+ times

FREE Resource

60 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

A law involves a ______ question.

why

what

how

where

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

A theory involves a ______ question.

why

what

how

where

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which can change based on new observations?

theory

law

Tags

NGSS.HS-ESS1-2

NGSS.HS-LS3-2

NGSS.HS-LS4-1

NGSS.HS-LS4-2

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

A theory can become a law with enough evidence.

true

false

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

A theory is

proven

supported a large body of evidence

both

Tags

NGSS.HS-ESS1-2

NGSS.HS-LS4-2

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Why is the collection of evidence necessary for plate tectonic theory?

A theory must be agreed upon by each scientist studying plate tectonics.

Scientists do not understand the theory of plate tectonics, so it needs to be modified.

A theory needs a large body of evidence to support our understanding of natural events.

Scientists should always add more evidence to existing theories, so they cannot be disproved.

Tags

NGSS.HS-ESS1-5

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Scientists base their explanations on evidence.

true

false

Tags

NGSS.HS-ESS3-1

NGSS.HS-LS1-6

NGSS.HS-LS4-1

NGSS.HS-PS1-2

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Scientific Law vs Theory

60 questions

A law involves a ______ question.

A theory involves a ______ question.

Which can change based on new observations?

A theory can become a law with enough evidence.

A theory is

Why is the collection of evidence necessary for plate tectonic theory?

Scientists base their explanations on evidence.

Has scientific knowledge changed at all over time?

A scientific THEORY

A scientific LAW

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