Which of these organisms is a producer in a marine ecosystem?
OPTIONS:
- fish
- gull
- algae
- worm

algae


Sodium chloride, commonly called "table salt," is made up of sodium and chlorine that have been combined chemically. Which term best describes sodium chloride?
OPTIONS:
- Acid
- Atom
- Element
- Compound

Compound


What would most likely be measure during an investigation of the water cycle?
OPTIONS:
- wind speed
- ozone layer
- natural gas emissions
- precipitation amounts


precipitation amounts