Question 1

A substance used in a chemical reaction?

Accepted Answer

reactant

Answer

replacement

Answer

decomposition

Answer

matter

Question 2

_________________ properties can be used to separate some mixtures.

Accepted Answer

chemical

Answer

physical

Answer

solutions

Answer

matter

Question 3

Heat and carbon can be used to release iron from ore.

Accepted Answer

true

Answer

false

Question 4

Reactants are listed on the ___________ side of an equation.

Accepted Answer

left

Answer

above

Answer

right

Answer

below

Question 5

Rust on chains is formed from what?

Accepted Answer

iron and oxygen

Answer

iron and calcium

Answer

iron and chlorine

Answer

oxygen and hydrogen

Question 6

When iron and sulfur react, what kind of chemical reaction is it?

Accepted Answer

combination

Answer

sublimation

Answer

decomposition

Answer

replacement

Question 7

Which of the following might be evidence of a chemical reaction?

Accepted Answer

formation of a gas

Answer

formation of gravity

Answer

formation of magnetism

Answer

formation of new elements

Question 8

Which list gives the correct order of the matter, from particles with the least energy to particles with the most energy.

Accepted Answer

solid, liquid, gas

Answer

liquid, gas, solid

Answer

solid, gas, liquid

Answer

gas, solid, liquid

Question 9

Which of these is true about matter during a chemical reaction?

Accepted Answer

The mass of the reactants is equal to the mass of the products

Answer

The mass of the reactants is not related to the mass of the products

Answer

The mass of the reactants is less than the mass of the products

Answer

The mass of the reactants is greater than the mass of the products

Question 10

Which are the reactants?

Accepted Answer

magnesium and oxygen

Answer

carbon dioxide

Answer

magnesium oxide and heat

Answer

magnesium and magnesium oxide

Question 11

What happens when a chemical change occurs?

Accepted Answer

atoms rearrange to form matter with different properties

Answer

atoms change into other kinds of atoms

Answer

atoms change into energy

Answer

atoms have a physical change

Question 12

Which of the following can be separated by a chemical process?

Accepted Answer

compound

Answer

solution

Answer

mixture

Answer

matter

Question 13

Strong acids will turn universal indicator paper purple

Accepted Answer

false

Answer

true

Question 14

Compounds split apart to form smaller compounds in a ________________________ reaction.

Accepted Answer

decomposition

Answer

chemical

Answer

replacement

Answer

combination

Question 15

The _________________________ states that matter can not be created or destroyed during a chemical reaction.

Accepted Answer

The Law of Conversation of Mass

Answer

The Law of Matter of Conversion

Answer

The Law of Conversation of Elements

Answer

The Echeverri Law of Matter

Question 16

In a ______________________ reaction, elements or compounds come together to form new compounds.

Accepted Answer

combination

Answer

decomposition

Answer

chemical

Answer

replacement

Question 17

A ______________________ takes place when a solid changes directly to a gas.

Accepted Answer

sublimation

Answer

decomposition

Answer

evaporation

Answer

condensation

Question 18

Which of the following is used to identify acids and bases?

Accepted Answer

indicator paper

Answer

flame test

Answer

filter paper

Answer

bar magnet

Question 19

What is the temperature at which a liquid turns into a solid.

Accepted Answer

freezing temperature

Answer

evaporation temperature

Answer

sublimation temperature

Answer

boiling temperature

Question 20

Which of these is an example of condensation?

Accepted Answer

dew forming on the grass

Answer

water freezing to form ice

Answer

water drying from an umbrella

Answer

ice cream melting

Question 21

Hydrogen peroxide can break apart to form water and and oxygen gas. Which type of chemical reaction is this?

Accepted Answer

decomposition

Answer

replacement

Answer

physical

Answer

combination

Question 22

What element delays the drying process in cement?

Accepted Answer

gypsum

Answer

carbon dioxide

Answer

geranium

Answer

magnesium

Question 23

What is the temperature when water turns into ice?

Accepted Answer

32 degrees F

Answer

0 degrees F

Answer

32 degrees C

Answer

20 degrees F

Question 24

What is the chemical equation of sugar?

Accepted Answer

C6-H12-O6

Answer

2C6- 2H2O

Answer

C6- H6- O6

Answer

6C- H2- O12

Question 25

Dry ice has the same chemical properties as?

Accepted Answer

CO2

Answer

2CO3

Answer

MgO2

Answer

NaCl

Question 26

Sulfur is yellow and _____________________________.

Accepted Answer

not magnetic

Answer

contains iron

Answer

magnetic

Answer

contains Mg

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