Test UNIT 1

Question 1

What is matter

Answer 1

Anything that has mass and takes up space

Question 2

What is an atom

Answer 2

Building block of all matter smallest unit of an element While still having the properties of that element.

Question 3

What is an element

Answer 3

Specific type of atom

Question 4

What is a substance

Answer 4

Combination of atoms that make something new

Question 5

What is a molecule

Answer 5

It is formed when atoms bond together

Question 6

What pattern do you see between a molecule and an atom

Answer 6

Molecules are made up of more than one atom and the atoms are singular

Question 7

What Is air made up of an in what percentages

Answer 7

Nitrogen 78%,
oxygen 21%,
Argon 1%,
trace gases less than 1%.

Question 8

What are examples of air pollution?

Answer 8

Ozone o3,
carbon monoxide,
nitrogen dioxide,
sulfur dioxide,
lead PB

Question 9

What are causes of air pollution?

Answer 9

Gasoline from cars,
power plants,
burning fossil fuels, and
industry

Question 10

How does changing the composition of the air with pollutants affect air quality

Answer 10

Toxic air can cause:
Cancer
kidney problems in children
coughing and
shortness of breath

Question 11

How are molecules arranged in solids?

Answer 11

They have a definite shape, and a definite volume

Question 12

How molecules move in a solid?

Answer 12

Molecules vibrate

Question 13

How are molecules arranged in a liquid?

Answer 13

They have no definite shape
but a definite volume

Question 14

How does the molecules in a liquid move?

Answer 14

They move freely but not to freely

Question 15

How are molecules arranged in a gas?

Answer 15

They have no definite shape or
a definite volume

Question 16

How do molecules move in a gas?

Answer 16

Particles in molecules move in random Motion

Question 17

What is density

Answer 17

How tightly packed atoms and molecules are in something

Question 18

What are the states of matter from most to least dense?

Answer 18

Solid, liquid, and gas

Question 19

How does a substance turn from a solid to a liquid?

Answer 19

Heat is applied which causes the molecules to vibrate faster until they begin to break free and move around.
The movement takes away the definite shape and the the solid begins to melt into a liquid

Question 20

How Does a substance turn from a liquid into a gas?

Answer 20

More heat makes the particles move faster making the liquid lose its volume is as it heats into a gas.

Question 21

What happens to water at the molecular level during phase changes from solid to liquid and liquid to gas?

Answer 21

Molecules in the water begin to move around more quickly as water changes from a solid to liquid and even more quickly as it changes from a liquid to a gas

Question 22

What is the periodic table of elements contain

Answer 22

It’s a table of all the types of atoms that have been discovered

Question 23

How can you do 118 atoms and have millions of molocules that are different?

Answer 23

Just like the 26 letters they can all be combined in different ways to make millions of molecules

Question 24

Can too much oxygen be bad?

Answer 24

Yes too much oxygen gives you oxygen toxicity

Question 25

What are some trace gases and what are some of their uses?

Answer 25

Ozone In the upper atmosphere it blocks ultraviolet radiation in the lower atmosphere it is pollution
Methane greenhouse gases trapping earths heat in the atmosphere
Other gases include helium water vapor carbon dioxide and hydrogen