Science Flash cards

Question 1

What is the law of conservation of mass?

Answer 1

Molecules are neither destroyed nor created.

Question 2

More energy is put in, less comes out.

Answer 2

Endothermic reaction.

Question 3

What is a catalyst?

Answer 3

A chemical that increases the rate of a reaction.

Question 4

How is a precipitate formed?

Answer 4

With 2 liquids combined.

Question 5

How does temperature affect the reaction’s speed?

Answer 5

If it is hot the speed will be fast, cold will make it go slowly.

Question 6

Less energy is put in, more comes out.

Answer 6

Exothermic reaction.

Question 7

What is the difference of a chemical and physical reaction?

Answer 7

Chemical shows a change in the product, physical does not.

Question 8

Solve this chemical reaction: H2O + C2O4 ———–>HO+CO2

Answer 8

H=2
O=5
C=2

Question 9

What clues show a chemical reaction has occurred?

Answer 9

Gas, precipitate, color change, temperature change.

Question 10

Acids and bases

Answer 10

Water, vinegar, and baking soda create a chemical reaction.