Word Meanings From Context

   The United States has a vast amount of newly discovered clean geothermal (natural heat from the Earth’s crust) energy. Tapping into this energy source could provide at least 10 times the energy that can be obtained from the nation’s known coal reserves.

1. What does “vast” mean?

a. a large amount
b. not enough
c. dangerous
d. having no known use
2. Which word in the above paragraph means supplies that are available to be used?

a. geothermal
b. tapping
c. continent
d. reserves

     Using IQ tests and MRI brain scans, researchers have found that the measurable intelligence of teenagers can rise and fall over time. We used to believe that intelligence was static. But now, because of new studies, we know that teens and even fully mature adults can grow more brain cells when needed.

3. What does “static” mean in the above selection?

a. noise
b. not changing
c. moldy
d. unreal
4. What are researchers?

a. people who lose things
b. people who search for knowledge
c. creatures from Mars
d. students who don’t study

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