Work, energy and Fuels

A technique used to separate mixture of gases in crude oil is called ______________.

• A.porous

• B. fractional distillation

• C. global warming

• D. organic compounds

__________________________ are compounds which contain carbon atoms joined to hydrogen and sometimes other atoms.

• A. diesel

• B. natural gas

• C. organic compounds

• D. paraffin

Which of the following are fossil fuels?

• A. coal

• B. plutonium

• C. natural gas

• D. crude oil

Why is crude oil called a fossil fuel?

• a. it is made from the remains of giants plants

• b. it is made from marine plants and animals

• c. it is made from terrestrial animals

• d. it is made from terrrestrial plants and animals

Check all the sentences about fossil fuels which are correct.

• a. Coal is a solid fossil fuel from the remains of marine plants and animals.

• b. Coal is a solid fossil lfuel formed from the remains of giant plants at swampy forest.

• c. Natural gas and crude oil are formed from the remains of marine plants and animals

• d. Natural gas and crude oil are formed from the remains of giant plants in swampy forest.

Which of the following sentences is true of a fractional distillation?

• A. The crude oil is heated to a temperature of about $200\degree C$

• B. The top is hotter than the bottom

• C. Crude oil turned into mixture of gases with different boiling points and are pumped out at same heights.

• D. Crude oil turned into mixture of gases with different boiling points and are pumped out at different heights.

Which of the following is a greenhouse gas?

• A. oxygen

• B. nitrogen

• C. carbon dioxide

• D.argon

The gradual increase in the Earth's atmosphere caused by high levels of greenhouse gases is called ___________.

• A. greenhouse effect

• B. global warming

• C. air polution

• D. energy conservation

The following are effects of global warming except ____________.

• A. powerful storms

• B. melting of polar caps

• C. flooding

• D. thinning of ozone layer

Which of the following is NOT a by-product of burning methane?

• A. carbon dioxide

• B. water vapor

• C. energy

• D. carbon monoxide