Biofuels Brain Pop

What is one major difference between fossil fuels and biofuels?

• Burning fossil fuels releases greenhouse gases; burning biofuels releases no greenhouse gases

• Fossil fuels exist in unlimited supply: our supply of biofuels may run out someday

• Fossil fuels are very expensive to manufacture: biofuels are very inexpensive to manufacture

• You can drive farther on a single tank of fossil fuel than you can on a single tank of biofuel

Ethanol is frequently made from which of the following?

• A

• B

• C

• D

When a source of energy is described as renewable, it means:

• It emits no pollution

• It's made out of organic material

• It can be mixed with gasoline

• Humans won't run out of it.

What is one negative effect of producing more ethanol for use as fuel?

• An increase in air pollution

• People buying fewer cars

• Rising prices of certain food crops

• Having to import more oil from abroad

The process by which microbes convert sugar to alcohol is called:

• Fermentation

• Distillation

• Remediation

• Calibration

In the movie, Tim mentions that a popular blend of ethanol is called E-10. What can you infer about the blend called E-20?

• It's 20 percent ethanol and 80 percent gasoline

• It's 80 percent ethanol and 20 percent gasoline

• It's 20 percent ethanol an 80 percent biodiesel

• It's 80 percent ethanol and 20 percent biodiesel

What advantage does biodiesel have over ethanol?

• It is 100 percent carbon neutral

• It can be manufactured from non-organic material

• It requires less energy to produce

• It can be used in gasoline-burning engines

What part of a corn plant is most likely to be used in the manufacture of cellulosic ethanol?

• The kernels

• The stalk

• The oil

• The roots

Which of the following is an opinion about biofuels?

• They're usually not 100 percent carbon neutral

• They are superiour to fossil fuels in most ways

• Many of them emit low amounts of greenhouse gases when burned

• Scientist are currently researching new sources of biofuel

Which term best describes the current state of algae-based biofuel?

• Impossible

• Widely available

• In development

• Inexpensive