economic english 4 docx

5. Isomers are molecules that have the same num￾ber of the same elements, but in a different

arrangement. Which one of the following is

an isomer of 2-propanol (shown below),

which contains Carbon (C), Hydrogen (H) and

Oxygen (O)?

a.

b.

c.

d.

e.

Questions 6 and 7 are based on the following passage.

The rectilinear propagation of light and the law

of reflection had been observed long before the

development of modern theories that correctly

explain these observations. Rectilinear propaga￾tion of light refers to the fact that light travels in

straight lines. Hero of Alexandria, who lived

around the first century, explained these obser￾vations by stating that light travels along the

shortest allowed path. It wasn’t until 1657 that

Pierre de Fermat rejected Hero’s shortest-path

theory and showed that light propagates along

the path taking the least time. From his princi￾ple of least time, Fermat re-derived the law of

reflection, as well as the law of refraction. This

principle played an important role in the devel￾opment of quantum mechanics.

6. The passage shows that

a. reflection and refraction can’t be explained by

the same theory.

b. the term reflection means that light travels in

straight lines.

c. Hero of Alexandria had insight into quantum

mechanics.

d. scientists develop theories to explain the phe￾nomena they observe in nature.

e. light travels along the shortest allowed path.

7. Which general statement about science is NOT

supported by the passage?

a. A scientific finding sometimes plays a role in

other scientific findings.

b. Centuries can pass before an observation is

correctly explained by science.

c. Theory should not be based on experimental

evidence.

d. Different scientists do not always come up

with the same explanation for an observation.

e. A scientific theory should be in agreement

with observations.

8. Lung cancer accounts for over 30% of all can￾cers. Smokers are 90% of lung cancer victims.

Lung cancer is rare in societies that don’t smoke.

Which is NOT a likely consequence of these

statistics?

a. Most smokers don’t quit because they experi￾ence withdrawal symptoms.

b. Congress passed a bill requiring tobacco com￾panies to label their product as harmful.

c. The percentage of smokers dropped after

these figures were made public.

d. The U.S. military developed a program to

eliminate all tobacco use from the armed

forces.

e. The Surgeon General issued a report stating

that smoking is a health hazard.

HHH

HHH

H H C C C

H OH

H H

H H C C

H H

H H

H OH C C

HHH

HHH

H OH C C C

H OH H

HHH

H C C C C

H

H

H

H OH H

HHH

H H C C C

–THE GED SCIENCE EXAM–

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