MII Post Assessment

Front

What is a combustion reaction?

Back

A combustion reaction is a chemical reaction that occurs when a substance (usually a hydrocarbon) reacts with oxygen to produce carbon dioxide, water, and energy.

Tags

NGSS.MS-PS1-5

Front

How many atoms of carbon, hydrogen, and oxygen are produced in the combustion of methane (CH4)?

Back

1 carbon, 4 hydrogen, and 4 oxygen.

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Front

What happens to the density of an object when it is remodeled to float?

Back

The density of the object does not change, but its shape can allow it to displace more water, making it float.

Front

What is the law of conservation of mass?

Back

The law of conservation of mass states that mass is neither created nor destroyed in a chemical reaction; it is simply rearranged.

Tags

NGSS.MS-PS1-5

Front

What is the chemical formula for carbon tetrachloride?

Back

CCl4

Tags

NGSS.MS-PS1-1

Front

Is copper tarnishing a physical or chemical change?

Back

Chemical change.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Front

What is density?

Back

Density is the mass of an object divided by its volume, often expressed in grams per cubic centimeter (g/cm³).

Front

What is the relationship between mass and density?

Back

Density is calculated by dividing mass by volume; therefore, for a given mass, an increase in volume results in a decrease in density.

Front

What is a physical change?

Back

A physical change is a change that affects one or more physical properties of a substance without altering its chemical composition.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Front

What is a chemical change?

Back

A chemical change is a change that results in the formation of new chemical substances.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5