Hydrocarbons

Compounds made only of carbon and hydrogen atoms are called ______________.

• hydrocarbons

• hydrogencarbonates

• carbohydrates

A substance with a high boiling point . . .

• changes rapidly from a liquid to a gas at a low temperature.

• changes rapidly from a liquid to a gas at a high temperature.

• flows easily.

• doesn't flow easily.

• is easy to ignite and burn.

Tags

NGSS.HS-PS1-5

The boiling point of hydrocarbons . . .

• increases with increasing molecular size.

• decreases with increasing molecular size.

• is not affected by molecular size.

The viscosity of hydrocarbons depends on the size of their molecules. What is viscosity?

• a measure of how difficult it is for a substance to flow

• a measure of how easy it is to ignite and burn

• a substance the temperature at which a substance rapidly changes state from a liquid to a gas

A substance with a low viscosity . . .

• evaporates at a low temperature.

• evaporates at a high temperature.

• flows easily.

• doesn't flow easily.

• is easy to ignite and burn.

Tags

NGSS.MS-PS1-4

The flammability of hydrocarbons depends on the size of their molecules. What is flammability?

• a measure of how difficult it is for a substance to flow

• a measure of how easy it is to ignite and burn

• a substance the temperature at which a substance rapidly changes state from a liquid to a gas

Tags

NGSS.HS-PS1-4

A highly flammable substance . . .

• evaporates at a high temperature.

• flows easily.

• doesn't flow easily.

• is easy to ignite and burn.

• is difficult to ignite and burn

Crude oil is a mixture of a very large number of compounds. Most of the compounds in crude oil are hydrocarbons. What is a hydrocarbon?

• a compound that contains only hydrogen and carbon atoms

• a compound that contains hydrogen, carbon and other elements

• a compound with a carbon backbone

Where is crude oil found?

• between layers of impermeable rock

• as seams of rock

• in the atmosphere

Tags

NGSS.HS-ESS3-1

What was crude oil formed from?

• plankton

• plants

• carbon dioxide

Tags

NGSS.HS-LS2-5