test 10

Question 1

Reactants

Answer 1

Beginning materials

Question 2

Products

Answer 2

Ending materials

Question 3

Exothermic reactions

Answer 3

Give off / release energy

Question 4

Endothermic reaction

Answer 4

Absorb energy

Question 5

Aqueous

Answer 5

Dissolved in water

Question 6

Chemical reaction

Answer 6

Process in which one or more substances are changes into a new substance

Question 7

Subscripts

Answer 7

Numbers below element on right side

Question 8

Chemical equation

Answer 8

Method to describe chemical reactions using formulas and coefficients

Question 9

Coefficient

Answer 9

Big number before formula

Question 10

Signs of chemical change

Answer 10

1 change in color
2 change in temperature
4 production of gas/smoke
5 production of a solid to liquid

Question 11

Synthesis (builds up)

Answer 11

Substances combine to make new substance
A+B= AB

Question 12

Combustion

Answer 12

Burning of a reactant in the presence of O2

Question 13

Decomposition (breaks down)

Answer 13

Compound is broken to produce 2 or more simpler substances
AB=A+B

Question 14

Single displacement

Answer 14

One element replaces another
A+BC= B+AC

Question 15

Double displacement

Answer 15

Two elements replace /exchange positions
AB+CD=AD+AB

Question 16

+ sign means what

Answer 16

Plus
Added to
Reacts with