Understanding Popular Science Projects

What role does the potato play in a potato battery?

• It provides the electrical energy.

• It acts as the cathode.

• It acts as the anode.

• It facilitates electron transfer.

In the erupting volcano experiment, what is the main byproduct of the reaction between baking soda and vinegar?

• Carbon dioxide

• Hydrogen gas

• Oxygen

• Sodium chloride

What is the chemical name for baking soda used in the volcano experiment?

• Acetic acid

• Sodium bicarbonate

• Sodium acetate

• Calcium carbonate

What is a common non-Newtonian fluid made from cornstarch and water called?

• Oobleck

• Slime

• Gelatin

• Putty

How does a non-Newtonian fluid behave when stress is applied quickly?

• It evaporates.

• It becomes more liquid-like.

• It becomes more solid-like.

• It changes color.