Susan shakes a bottle of oil and vinegar salad dressing, then sets it on the table. After a while, the oil rises to the top and the vinegar settles on the bottom of the bottle. Why does this happen?

What are the evidence of continental drift

What color is lead.?

Balance the following chemical equation

How many total atoms are in the compound: C6H12O6 18 6 12 24

What is a substance that by its presence increases the speed of a chemical reaction between other substances and yet is itself unchanged by the reaction? a. accelerator b. catalyst c. inducement d. reactor

All of the following are possible sources of error in a scientific investigation except for O measuring materials such as mass and volume incorrectly. o recording experimental data incorrectly. o having a constant in your experiment.

Do polyatomic ions have fixed charges?

Which type of organism is used to make bread rise when baking? A. plants B. protists C. yeast D. bacteria

How many particles are in 3.55 moles of Aluminum Sulfate

Major geological events that occur when plates shift suddenly and released stored energy: A. Volcanic eruptions B. Earthquakes C. Antarctic plate D. Spreading ridges