Matter and Chemistry Review

The smallest unit of calcium carbonate is given by the formula CaCO_3. What are the components of calcium carbonate?

• 1 calcium atom, 1 carbon atom, and 3 oxygen atoms

• 1 calcium atom, 1 carbon atom, and 1 oxygen molecule

• 1 calcium molecule, 1 carbon molecule, and 3 oxygen atoms

• 1 calcium molecule, 1 carbon molecule, and 1 oxygen molecule

Tags

NGSS.MS-PS1-1

Catie set a glass of hot water and a glass of cold water on the kitchen table and let them sit for one hour. How will the particle motion within the glasses change?

• The particles in both glasses will speed up

• The particles in both glasses will slow down.

• The particles in the hot water will slow down, while the particles in the cold water will speed up.

• The particles in the hot water will speed up, while the particles in the cold water will slow down.

Tags

NGSS.MS-PS1-4

Vinegar is added to milk. Clumps of white solid are formed that can be separated from the remaining clear liquid. There is no noticeable temperature change. The evidence for a chemical reaction is the

• formation of a solid substance.

• odor of each substance.

• separation of two substances.

• constant temperature of the substances.

Tags

NGSS.MS-PS1-2

Liam knows that some of the bubbles in his experiment must be oxygen. He draws an atomic model of the element oxygen. What does he include in his drawing? Select all that apply

• eight protons in the nucleus

• eight neutrons in the nucleus

• eight electrons outside of the nucleus

• sixteen electrons outside of the nucleus

Tags

NGSS.MS-PS1-1

According to the graph, at what temperature does water have the greatest density?

• −4°C

• 4°C

• 20°C

• 0°C

When you heat a sample of a gas, what happens to the particles that make up that gas?

• They move faster and spread apart.

• They move slower and become more dense.

• They become much smaller and take up less space.

• They become much larger and take up more space.

Tags

NGSS.MS-PS1-4

How can the law of conservation of mass apply to a burning log, if all that remains of it is ash?

• The ash has the same mass as the log, although a large percentage of it blows away.

• The law of conservation of mass applies to changes of state but not to chemical reaction

• The law of conservation of mass applies to substitution and displacement reactions, but not to combustion reactions.

• The masses of the gases released into the air plus the mass of ash equal the mass of the log before burning.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

What is the main principle behind the law of conservation of matter?

• Mass does not change phase during a reaction.

• The total mass does not change during a reaction.

• Heat is added during a reaction for the mass to remain constant.

• Mass will always remain constant unless a change has occurred.

Tags

NGSS.MS-PS1-5

When Steven makes and eats scrambled eggs, many changes occur to the eggs. Which of the following best describes a chemical change?

• scrambling the eggs

• cracking the eggs

• chewing the eggs

• cooking the eggs

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

NGSS.MS-PS1-5

Unknown elements W and X interacted to form a new substance. This indicates that W and X must have experienced a

• temperature change.

• chemical change.

• physical change.

• phase change,

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5