S221 Semester 2 DBA Review

S221 2nd Semester DBA Review

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Waves

Remember

Energy cannot
always be seen,

touched or held in

your hand, but

energy is

everywhere.

Energy is the ability to
do work, to make things
happen and to cause
changes.

Energy cannot be made
or destroyed; it can only
be changed into
different forms.

What is a wave?

In physics, a wave is a
disturbance that travels
through space and
matter transferring
energy from one place
to another.

What is a wave?

Waves transport
energy, not matter.

Waves in Your World

★

Sound is a longitudinal wave that moves through matter and then vibrates our

eardrums so we can hear.

★

Light is a special kind of wave that is made up of photons.

★

You can drop a rock into a pond and see waves form in the water.

★

We even use waves (microwaves) to cook our food really fast.

Multiple Choice

Sounds is a ______________ wave.

• Ocean

• Longitudinal

• Transverse

• Gravitational

Parts of a Wave

6 Parts of a Transverse Wave

1.

Crest

2.

Trough

3.

Wavelength

4.

Amplitude

5.

Frequency

6.

Node

Parts of a Transverse Wave

1.

Crest: The highest point of the wave

2.

Trough: The lowest point of the wave

Parts of a Transverse Wave

3. Wavelength: The distance between two identical parts of a wave. One
full wave consists of three nodes, one crest and one trough.

Parts of a Transverse Wave

4. Amplitude: The magnitude, or size, of the crests and troughs. How high or
low the crest and trough go.

Parts of a Transverse Wave

5. Frequency: How many times a single wave passes through a given point
every second.

Multiple Choice

The distance between the base line and the "top" of the crest is called?

• wavelength

• frequency

• amplitude

• node

Multiple Choice

The "distance" between identical parts of a wave is called...

• frequency

• period

• wavelength

• amplitude

Multiple Choice

What type of wave is this?

• transverse

• longitudinal

Multiple Choice

What type of wave is this?

• Transverse

• Longitudinal

Multiple Choice

What type of wave is the orange (top) wave?

• Transverse

• Longitudinal

Multiple Choice

What type of wave is the pink (bottom) wave?

• Transverse

• Longitudinal

Multiple Choice

Which color has the longest wavelength?

• purple

• green

• orange

• red

Multiple Choice

Which color has the smallest frequency?

• purple

• green

• orange

• red

Multiple Choice

Which color has the largest amplitude?

• blue

• green

• orange

• they all have the same amplitude.

Multiple Choice

What is the speed of a wave with a wavelength of 10 meters and a frequency of 2Hz?

• 5 m/hz

• 20m/s

• 12m/hz

• 0.5Hz/m

Matter

What is Matter?

What are examples of

matter?

What is NOT matter?

Anything that has

mass and takes up

space.

People, atoms,

chairs, food,…etc.

Emotions, Energy

Atom

A unit of Matter, the smallest unit of an

element having all the characteristics of

that element

Contains Protons, Neutrons, and Electrons

Molecule

The smallest particle of a substance that

retains the chemical and physical

properties of the substance and is

composed of two or more atoms

Element

A Pure substane containing only one kind

of ATOM

Examples: Lithium (Li), Calcium (Ca),

Oxygen (O)

Compound

A pure substance containing two or more

DIFFERENT

kinds of atoms

CHEMICALLY COMBINED

Examples: Sodium Chloride (Table Salt)

Pure Substance

Substance with the same composition

throughout and the same set of properties

Elements, or Compounds

H

2

O, S

8

, O

2

, H

2

Mixture

Two or more elements or compounds not

chemically combined

Examples: Pop, Cereal, Salad, Salt Water

Multiple Choice

Does the image represent atoms, molecules, or both?

• atoms

• molecules

• both

Multiple Choice

Does the image represent atoms, molecules, or both?

• atoms

• molecules

• both

Multiple Choice

Does the image represent atoms, molecules, or both?

• atoms

• molecules

• both

Multiple Choice

Does the image represent an element, compound or mixture?

• element

• compound

• mixture

Multiple Choice

Does the image represent an element, compound or mixture?

• element

• compound

• mixture

Multiple Choice

Does the image represent an element, compound or mixture?

• element

• compound

• mixture

Multiple Choice

Which state of matter has a definite (constant) shape AND volume?

• solid

• liquid

• gas

Multiple Choice

Which state of matter has a definite (constant) volume but can take the shape of the container its in?

• solid

• liquid

• gas

Multiple Choice

Which state of matter takes the shape and volume of the container its in?

• solid

• liquid

• gas

Multiple Choice

The green (right) sample represents which state of matter?

• solid

• liquid

• gas

Multiple Choice

The red (left) sample represents which state of matter?

• solid

• liquid

• gas

Multiple Choice

The blue (middle) sample represents which state of matter?

• solid

• liquid

• gas

There are 2 types of “Changes” a substance can go through.

Chemical Identity

A substance has a chemical identity described by the matter that makes it up.

EX: Water has a chemical identity of 2 Hydrogen atoms and 1 Oxygen.

Chemical Identity Definition…

● Idea that every substance has at least 1 property that

makes it unique

○ Describes what the substance is made ofand

○ The characteristics that substance has

Describe this substances chemical identity…

Sucrose: C12H22O11

Chemical Change

A chemical change happens when one chemical
substance is transformedinto one or more different
substances

EX:

Chemical Change

Explain what why this image illustrates a chemical
change, iron → rust.

Physical Change

During a physical change substances go through a
change that DOES NOT change the substances
chemical identity.

EX…

Physical Change

During a physical change substances go through a
change that DOES NOT change the substances
chemical identity.

EX…

H2O

H2O

H2O

Multiple Choice

Digestion is a _____________change

• chemical

• physical

Multiple Choice

tearing a paper is a _____________change

• chemical

• physical

Multiple Choice

Melting is a _____________change

• chemical

• physical

Multiple Choice

Crushing a can is a _____________change

• chemical

• physical

Multiple Choice

Producing gas is a _____________change

• chemical

• physical

Multiple Choice

Burning wood is a _____________change

• chemical

• physical

Multiple Choice

Which subatomic particle has a negative charge?

• Proton

• Neutron

• Electron

Multiple Choice

Which subatomic particle has a positive charge?

• Proton

• Neutron

• Electron

Multiple Choice

Which subatomic particle has no charge?

• Proton

• Neutron

• Electron

Multiple Choice

Which subatomic particle has no mass?

• Proton

• Neutron

• Electron

Multiple Select

Which subatomic particle has a mass of 1 amu?

• Proton

• Neutron

• Electron

Please get your Periodic Table!

Remember this?

Multiple Choice

How many neutrons does Potassium have?

• 19

• 20

• 39

• 58

Multiple Choice

How many electrons does neutral Calcium have?

• 20

• 21

• 40

• 61

Multiple Choice

How many Protons does Fluorine have?

• 1

• 9

• 10

• 19

Multiple Choice

What is the atomic number for Rubidium?

• 13

• 37

• 50

• 87

Multiple Choice

What is the mass number for Cobalt?

• 27

• 30

• 57

• 87

Multiple Choice

Each vertical (up and down) column is called a(an) __________.

• element

• group

• isotope

• period

Multiple Choice

Left to Right (Horizontal) sections of the periodic table are called....

• groups

• clusters

• sections

• periods

Multiple Choice

Which element has a mass number of 98?

• Cf

• Tc

• Mo-81

• Pd-90