8th Grade Science 1st semester

Front

What turns pH paper and universal indicator red?

Back

Acids

Front

Is the equation 2Fe2O3 + 3C --> 4Fe + 3 CO2 balanced or unbalanced?

Back

Balanced

Front

In a reaction A + B --> C, if reactant A has 5g and product C has 9g, how many grams does reactant B have?

Back

4g

Front

What is Newton's Second Law expressed as?

Back

F = ma

Front

What is the ability of water molecules to stick to each other, creating surface tension called?

Back

Cohesion

Front

What is the pH range of acids?

Back

0 to 6.9

Front

What is the pH range of bases?

Back

7.1 to 14

Front

What is the law of conservation of mass?

Back

Mass is neither created nor destroyed in a chemical reaction.

Front

What is the formula for calculating force?

Back

F = ma (Force = mass x acceleration)

Front

What is the difference between cohesion and adhesion?

Back

Cohesion is the attraction between molecules of the same substance; adhesion is the attraction between molecules of different substances.