Chapter 2 Pre-test

Experiments are designed so that the control group differs from the experimental group by one key variable.

• True

• False

The concept of gravity an example of a scientific law.

• True

• False

A scientific hypothesis must be testable.

• True

• False

Tags

NGSS.HS-PS1-2

Scientists read each other's work only after it is published.

• True

• False

A scientific hypothesis is a scientific theory that has been thoroughly tested.

• True

• False

Matter can exist in three physical states—solid, liquid, and compound.

• True

• False

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NGSS.MS-PS1-4

NGSS.MS-PS3-4

Two or more atoms can combine to form a molecule.

• True

• False

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NGSS.MS-PS1-1

An acidic solution has a pH greater than 7.

• True

• False

Organic compounds always contain carbon.

• True

• False

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NGSS.HS-LS1-6

Whenever matter undergoes a physical or chemical change, no atoms are created or destroyed.

• True

• False

Tags

NGSS.MS-PS1-5