Review Questions over Chem Lessons 1-12

First and Last Name

Science Class Period

• Period 1
• Period 4
• Period 5
• Period 6
• Period 7

What happened when you mixed baking soda, road salt, and water?

• the temperature increased and a gas was produced
• it changed color
• the material melted

Which correctly describes the chemical reaction demonstrated by the Statue of Liberty?

• copper + acetate --> copper acetate
• copper + vinegar --> green tarnish
• copper + vinegar --> copper acetate

When we distilled the drink mix solution (powder mixed with water), what liquid did we collected in Flask 2?

• water
• drink mix solution
• sugar

What happened to the mass when the seltzer tablets reacted in water in the OPEN BOTTLE?

• The mass decreased
• The mass stayed the same
• The mass increased

Can a chemical reaction happen if there is only one substance to start?

• No, you have to have at least two substances for them to react.
• It depends. When we burned magnesium, it only used magnesium.
• Yes, during the electrolysis of water, we started with just water.

Are boiling water and electrolysis the same?

• No, during boiling the atoms don't rearranged, but during electrolysis they do.
• Yes, both of them involve water and produce bubbles.
• No, boiling produces a gas, but electrolysis does not.

Which statement correctly describes the relationship between atoms and molecules?

• Atoms bond together to form molecules.
• Molecules bond together to form atoms.
• Atoms are made of protons, neutrons, and electrons, but molecules are made of cells.

In our model, what does each toothpick represent?

• a bond
• an atom
• a molecule