The term extrasolar, as used in paragraph 3 means
inside our solar system.
outside our solar system.
larger than our solar system.
smaller than our solar system. ✔✔Outside our solar system
From this article we can infer that
- many machines depend on the properties of molecules.
- the world is not governed by particles or atoms, but is chaotic.
- the ancient Greeks’ concept of four elements was the basis of modern science.
- modern science does not depend on molecular knowledge. ✔✔many machines depend on the
properties of molecules.
When liquid water is changed to ice, the particles are - more energetic.
- more fluid.
- banded further apart.
- bound closer together. ✔✔Bound closer together
An appropriate title for this selection would be - Gold in the Elements.
- The Makeup of Everything.
- How the Greeks Failed.
- The Useless Molecule. ✔✔The Make up of Everything
Based on this article, we can assume that the author - does not appreciate vocabulary and illustrations.
- believes the study of elements is no longer relevant.
- is knowledgeable about history and science.
- uses analogies that are confusing. ✔✔Is Knowledgeable about history and science
From the passage, we learn that ancient Greeks proposed that - there are 105 different elements in the world.
- elements are substances that contain many kinds of atoms.
- the behavior of molecules cannot be observed.
- all things are made up of atoms. ✔✔all things are made up of atoms.
In the context of this article, the word conjured as used in paragraph one means
conferred.
intertwined.
imagined.
swept. ✔✔Imagined
The article states that - HIV spread worldwide from a city in the Democratic Republic of Congo.
- intravenous drug users were the first identifiable victims of HIV.
- we may soon know definitively the mechanism of chimp virus infection of humans.
- researchers have identified 98% of the chimp genome. ✔✔
According to the article, which statement is true? - Chimps and humans share the same genes.
- AIDS is caused by a simple virus.
- Beatrice Hahn was the lead author of the science study.
- Cameroon was probably the birthplace of HIV. ✔✔Cameroon was probably the birthplace of
HIV.
In order for virologists to determine causes of certain diseases in the future, they will probably