5th - Science Unit 2 - 2nd Revised

Question 0

When what loses heat, it condenses into liquids.

Answer 0

Gas

Question 1

What is a change of matter in size, shape, or state that does not change the type of matter?

Answer 1

Physical Change

Question 2

Energy from the sun cause the different forms of water on Earth to change __________ in the water cycle.

Answer 2

Forms

Question 3

Nonmetals have __________ boiling and melting points because their particles are _____________ attracted on one another.

Answer 3

Low; weakly

Question 4

The temperature at which a substance changes from a solid to a liquid is its what?

Answer 4

Melting point

Question 5

What is the freezing point of water?

Answer 5

0 degrees C

Question 6

What is the process of changing directly from a solid into a gas without first becoming a liquid?

Answer 6

Sublimation

Question 7

What is the change of a liquid into a gas below the boiling point?

Answer 7

Evaporation

Question 8

What is the changing of a gas into a liquid?

Answer 8

Condensation

Question 9

Tiny water droplets form on a drinking glass when water what?

Answer 9

Condenses

Question 10

Ice is more or less dense than liquid water.

Answer 10

Less

Question 11

Water particles take up more or less space as a liquid than as a solid.

Answer 11

Less

Question 12

A chemical reaction occurs when atoms break their ________________ and form ________________.

Answer 12

Old links; new links

Question 13

Plants use the sun’s energy to carry out the chemical reaction called what ?

Answer 13

Photosynthesis

Question 14

What is H2O?

Answer 14

The chemical property for water.

Question 15

What side of the chemical equation are the products?

Answer 15

Right side

Question 16

What side of the chemical equation are the reactants on?

Answer 16

Left side

Question 17

What is a substance that is formed by the chemical combination of two or more elements?

Answer 17

Compound

Question 18

What is a solid that is a product of a chemical equation?

Answer 18

Precipitate

Question 19

Iron Oxide, Fe2O3; and Carbon Dioxide, CO2 are examples of what?

Answer 19

Chemical formulas

Question 20

Rust is formed by the combination of what?

Answer 20

Iron and oxygen

Question 21

What causes the changes in the state of matter?

Answer 21

Heat energy

Question 22

What is a color change on a metal that is caused by a chemical change?

Answer 22

Tarnish

Question 23

The following are examples of what type of change: salt mixing with pepper, water evaporating, liquid water freezing to form ice, paper shredding, and smashing an aluminum can?

Answer 23

Physical Change

Question 24

The following are examples of what type of changes: an iron wheel rusting, a gas forming from adding baking soda to vinegar, and burning paper?

Answer 24

Chemical Change