Question: Choose your answer.

Sodium (Na) and chlorine (Cl) combine to form sodium chloride (NaCl), which is commonly known as

OPTIONS:
- soap.
- vinegar.
- table salt.
- baking soda.
My Answer: table salt.

Question: Choose your answer.

The yellow-throated longclaw is a bird that lives on the dry savanna of Africa. It looks almost exactly like another bird, the western meadowlark of North America. Although the birds look very similar, they are not even in the same taxonomic family. Scientists think the birds look alike because the two species developed under similar environmental pressures, even though they developed thousands of miles apart. Which process does their development demonstrate?

OPTIONS:
- sexual selection
- disruptive selection
- divergent evolution
- convergent evolution
My Answer: convergent evolution

Question: Choose your answer.

What is the primary source of energy for organisms from a beach ecosystem?

OPTIONS:
- sand
- oxygen
- the Sun
- the ocean
My Answer: the Sun

Question: Choose your answer.

Which of these events have the most influence on regional climate?

OPTIONS:
- frequent tornadoes
- ocean trade winds
- winter snowstorms
- temperature inversions
My Answer:
ocean trade winds