Sodium, Na, is in the same group as OPTIONS:
- Ne.
- Mg.
- Ca.
- K.
A: K.

If a new organism were discovered, which of the following would most likely be used to classify it into the appropriate kingdom? OPTIONS:
- the color of the organism
- the organism's natural habitat
- the structure of the organism's anatomy
- the location where the organism was found
A: the structure of the organism's anatomy

The source of energy for the Earth's water cycle is the OPTIONS:
- wind
- Sun's radiation
- Earth's radiation
- Sun's gravity
A: Sun's radiation

Which of these is a property of water that allows it to transport materials through the Earth system? OPTIONS:
- It expands as it solidifies.
- It is transparent.
- It dissolves many substances.
- It is a compound.
A:
It dissolves many substances.