Matter Unit Test

Front 1

Why is it important to control variables in an experiement?

Back 1

If you do not control variables, then you cannot learn about the effect of the independent variable.

Front 2

What is matter?

Back 2

Anything that has mass and takes up space.

Front 3

What is the Meteric System and what number is it based on?

Back 3

a universal measurement system based on the number 10

Front 4

What units are used to measure mass?

Back 4

grams

Front 5

What is the difference between mass and weight?

Back 5

mass is onstant, weght is not
mass is measured in grams, weight is measured in Newtons;
mass is a measure of matter, weight is a measure of gravity.

Front 6

What is volume?

Back 6

the amount of space an object takes up

Front 7

What units would be used to measure the volume of a liquid?

Back 7

mL or L

Front 8

List 6 physical properties of matter.

Back 8

density, solubility, conductivity, state, malleability, ductility (texture, size, shape, color)

Front 9

What is density?

Back 9

The amount of matter in a given volume

Front 10

What is mass?

Back 10

the amount of matter in an object

Front 11

What units would be used to measure the volume of a solid?

Back 11

cubic centimeters or cubic meters

Front 12

What is formula for density?

Back 12

d=m/v

Front 13

What would the units of density be for a solid?

Back 13

g/cm3

Front 14

What would be the units of density for a liquid?

Back 14

g/mL

Front 15

List the 3 chemical properties of matter.

Back 15

reactivity
flammability
combustibility

Front 16

Why are chemical properties harder to observe than physical properties?

Back 16

Because if you are observing a chemical property, the substance is already changing

Front 17

What is the diffenece between a physical change and a chemical change?

Back 17

Physical change does not change theh identity bt chemical change does

Front 18

List all the signs of a chemical change.

Back 18

Bubbles and fizzes
produces heat or light
produces something new
changes color
changes smell

Front 19

What are the four states of matter?

Back 19

solid, liquid, gas, plasma

Front 20

Explain how the particles move in each state of matter.

Back 20

Solid - vibrate in place
liquids - slide past one another; faster than solid
gases: move rapidly;
plasma: move fastest and are charged

Front 21

Which state of matter has the particles that move the fastest?

Back 21

plasma

Front 22

What state of matter has the greates amount of energy?

Back 22

plasma

Front 23

What is the difference between a gas and plasma?

Back 23

plasma has charged particles and is super heated

Front 24

List all the changes of state and define them.

Back 24

melting - solid to liquid
freezing - liquid to solid
evaporation - liquid to gas
condensation - gas to liquid
sublimation - solid to gas

Front 25

What is an atom?

Back 25

Building block of all matter.

Front 26

What charge does each particle have?

Back 26

Proton - positive charge
Neutron - zero/no charge (neutral)
electrons - negative charge

Front 27

What is a pure substance?

Back 27

A pure substance has only one type of atom or only one type of molecule. It cannot be separated physically into a simpler substance.

Front 28

What 2 types of matter are pure substances?

Back 28

Elements and compounds are pure substances.

Front 29

What is an element?

Back 29

An element is a pure substance with only one type of atom. An element has the same properties throguhtout and cannot be broken down into simpler substances.

Front 30

How is the periodic table arranged?

Back 30

The periodic table is arranged by atomic number first.

Front 31

How is the periodic table arranged?

Back 31

Ther periodic table is arraqnged by atomic number first

Front 32

What is a period?

Back 32

A period is a horizontal row of elements.

Front 33

What is a group or family?

Back 33

A group is a vertical column of elements that are closely related to each other. All elements in a group share certain properties.

Front 34

How do properties change as you move across a period?

Back 34

Properties change gradually as you move from left to right across a period.

Front 35

Explain why the elements in a group or family are more closely related than those in a period?

Back 35

Elements in a group are more closely related b/c they share the same number of electrons in the outer shell and have the same physical and chemical properties.

Front 36

What is a compound?

Back 36

A compound is a combination of two or elements that are chemically combined. When combined, the elements from a new substance with new properties or characteristics.

Front 37

How are compounds formed?

Back 37

Compounds are formed by elements comgining chemically in a specific ratio.

Front 38

What happens to the identieis of the elements when a compound is formed?

Back 38

Elements lose spcific physical and chemical properties when combined in a compound and develop a new substance with new characteristics and properties.

Front 39

Give three examples of chemical formulas.

Back 39

H2O, NaCl, CO2

Front 40

What is a solution?

Back 40

A solution is a homogeneous mixture that appears to be the same throughout; well-mixed

Front 41

Whgat is the difference between a solution (homogeneous mixture) and a heterogeneous mixture?

Back 41

In a heterogeneous mixture - substances are easily identified
In a homogeneous mixture - looks the same, unable to identify parts of the mixture.

Front 42

In a chemical reaction, what is the reactant?

Back 42

The reactants are the compounds or elements that you start with (the ingredients) on the left side of the equation.

Front 43

In a chemical reaction, what is the product?

Back 43

The product is the result or what is procduced on the right side of the equation.

Front 44

What does the law of conservation of mass mean?

Back 44

Mass of products = mass of reatants; matter cannot be created or destroyed, it only changes forms.