Science Midterm Chapter 7

Question 1

Anything that has mass and takes up substance can be considered as

Answer 1

matter

Question 2

Also known as the building blocks of matter, these tiny particles are 1,000,000 ties smaller that the width of a human hair

Answer 2

atoms

Question 3

If you were to investigate the nucleus of an atom you would likely find

Answer 3

neutrons and protons

Question 4

Matter with a compostion that is always the same would be expected in a

Answer 4

substance

Question 5

Iron, Calcium, and Carbon are all examples of

Answer 5

elements

Question 6

What would you call H2O and CO2

Answer 6

compounds

Question 7

In order for a substance, containing two or more atoms of different elements, to be considered a compound, the different atoms must be

Answer 7

chemically combined

Question 8

Carbon -14 is a great example of an

Answer 8

isotope

Question 9

H2O and CO2 are both examples of a

Answer 9

chemical Formula

Question 10

A cesar salad is a great example of a

Answer 10

heterogeneous mixture

Question 11

When you mix a powdered drink like Gatorade with water, the mix is referred to as the

Answer 11

solute

Question 12

What is the ability of an object to be dissolved

Answer 12

solubility

Question 13

Which of the following best classifies physical properties (Size dependent and size independent, Length dependent and length independent, mass and neutrons, or solutes)

Answer 13

size dependent and size independent

Question 14

What formula do we use to determine density

Answer 14

mass/volume

Question 15

Which of the following are considered dependent properties (Density, Boiling point, Melting point, or volume)

Answer 15

volume

Question 16

If you had a density of 5g/mL and a mass of 50g, what would the volume need to be

Answer 16

10mL (V=M/D)

Question 17

What is another word for homogeneous mixture?

Answer 17

solution

Question 18

What would be a good example of physical change (Ice melting in a pool of water, Silver tarnishing, Roasting marshmallows, Or rust forming on a nail)

Answer 18

Ice melting in a pool of water

Question 19

When you have a physical change you will never end up with

Answer 19

A new substance

Question 20

Adding thermal energy to matter may cause

Answer 20

The state to change

Question 21

The boiling point of matter is the point at which

Answer 21

A liquid becomes a gas

Question 22

What do we call it when a gas becomes a liquid

Answer 22

condensation

Question 23

Freezing and melting are reverse processes, but they

Answer 23

occur at the same temperatures

Question 24

If a sample water has a mass of 100g and you add 10g of solute, you will have a final solution with a mass of 110g this is because the law of

Answer 24

conservation of mass

Question 25

Which never changes during a physical change (States of matter, Temperature, Volume, or Total mass)

Answer 25

Total mass

Question 26

What is a good example of a chemical property (Ability to burn, Ability to change states, Ability to change size, or Ability to freeze)

Answer 26

Ability to burn

Question 27

When a small branch of a tree decomposes in the forest, it is an example of

Answer 27

A chemical change

Question 28

Which one of these is proof of chemical change (Bubbles, The formation of the same substance, The formation of a new substance, or Added energy)

Answer 28

The formation of a new substance

Question 29

When atoms collide and rerange and bond into new combinations you have

Answer 29

A new substance

Question 30

What do we call the substances on the left side of the chemical equation, before the reaction occurs?

Answer 30

Reactants

Question 31

What do we call the new substances formed after a chemical reaction?

Answer 31

Products

Question 32

The arrow in a chemical formula is read as

Answer 32

Yields

Question 33

Higher temperatures and concentrations usually increase the rate of reaction but you can also increase the rate of reaction by increasing the

Answer 33

Area

Question 34

The water level in a cylinder is determined by the ____ line

Answer 34

meniscus

Question 35

To measure the volume of an irregular shape such as a bolt you have to measure the ________ of water

Answer 35

displacement

Question 36

Physical properties can either be size ______ or size _____

Answer 36

Dependent or independent

Question 37

What is another way to represent volume besides using the mL measurement

Answer 37

cm3