Question: Choose your answer.

To compare the hardness of different minerals, it would be BEST to find

OPTIONS:
- the color of the minerals.
- which minerals scratch other minerals.
- which minerals reflect light most strongly.
- the samples that feel smoothest to the touch.
My Answer: which minerals scratch other minerals.

Question: Choose your answer.

An astronomical unit (AU) refers to the distance between

OPTIONS:
- Earth and the Sun.
- the Moon and the Sun.
- Earth and the Moon.
- the Sun and the nearest star.
My Answer: Earth and the Sun.

Question: Choose your answer.

Who was a leading authority on continental drift in the early 1900s?

OPTIONS:
- Alfred Wegener
- Albert Einstein
- Charles Richter
- Charles Darwin
My Answer: Alfred Wegener

Question: Choose your answer.

A student leaves a rock in the Sun on a bright afternoon. An hour after sunset, the weather is cool, but the rock still feels warm. The student has demonstrated a property of the rock resulting directly from which of the rock's other properties?

OPTIONS:
- its reactivity
- its magnetism
- its specific heat
- its chemical energy
My Answer:
its specific heat