Ques: Q: What is a series of processes that remove unwanted substances from water called? Choices: - water filtration - water dilution - water cleaning - water treatment A:
Ans: water treatment

Ques: Q: The first photosynthetic organisms were not plants, but types of what that lived in the water? Choices: - pathogens - fungi - algae - bacteria A:
Ans: bacteria

Ques: Q: What force occurs whenever two surfaces come into contact? Choices: - tension - vibration - gravity - friction A:
Ans: friction

Ques: Q: When a solvent with a gas dissolved in it is heated, the kinetic energy of both the solvent and solute _________? Choices: - evaporates - generates - decreases - increases A:
Ans:
increases