Unit 6 Review Science 8

Copper is a pure element. What would the smallest piece of copper be?

• A copper atom

• A copper molecule

• A compound containing two or more elements

• A mixture of different kinds of metallic elements

Tags

NGSS.MS-PS1-1

Which two terms describe salt (NaCl)?

• Element, pure substance

• Compound, mixture

• Element, mixture

• Compound, pure substance

Which chemical formula describes carbon monoxide?

• OC

• CO

• CM

• CX

Tags

NGSS.MS-PS1-1

How is a scientific law different from other laws in society?

• A scientific law is what scientists have decided should be forced to happen in nature.

• A scientific law serves to protect people, property, and nature from harm.

• A scientific law describes what always happens under specific conditions in nature.

• A scientific law is a rule about how to treat and punish people.

Jeff is experimenting with how the amount of air inside a basketball affects how high it bounces. He uses logical reasoning to conclude that he should drop each ball from the same height. Why is this important?

• Dropping the balls from the same height is less fun.

• Dropping the balls from different heights would take longer.

• Dropping the balls from different heights would introduce error.

• Dropping the balls from the same height will create more data for the experiment.

What would you be measuring if you dropped a marble in a graduated cylinder?

• volume of the marble

• density of the liquid

• height of the marble

• mass of the marble

The X s show the location of beanbags a student tossed at a target. The student was aiming for the center circle. Which words best describe the student's results?

• Low precision, high accuracy

• Low precision, low accuracy

• High precision, high accuracy

• high precision, low accuracy

This graph shows the speed of a beetle's motion as it crawls across a road. Speed is distance traveled divided by elapsed time.

• The segment from 1 to 2 minutes

• The segment from 0 to 1 minute

• The segment from 3 to 4 minutes

• The segment from 2 to 3 minutes

Tags

NGSS.MS-PS3-1

What did Thomson discover as a result of his experiments with cathode ray tubes?

• Electrons are found within electron clouds of atoms.

• Atoms are made up of smaller subatomic particles.

• Each atom has a positive nucleus at its center.

• Electrons travel along circular paths within atoms.

How are a proton and a neutron alike?

• Each has a positive charge.

• Each is found outside the nucleus.

• Each has a mass of 1au.

• Each has a charge that balances the charge of an electron.