Physics

TAKS Review

Let’s get started with…Differences between

convection, conduction, and

radiation

Convection, Conduction and Radiation

1. Convection -the transfer of heat by warmed matter.-occurs between liquids and gases.-heat moves in fluid motion

Examples: steam from a coffee cup, warmth from a fire, and

warm air rising

Convection, Conduction and Radiation

2. Conduction- the transfer of energy from particle to

particle- occurs between solids

Examples: spoon in hot cup of soup becoming warmer, touching the stove and metal feeling cold

Convection, Conduction, and Radiation

3. Radiation -Electromagnetic waves transporting

energy through space.-Sunlight transfers waves

Examples: feeling warmth from the sun and light from a light bulb

Let’s practice…Try questions 1-9 on your review packet

Now let’s talk about energy…

Energy

Renewable Energycan be replenished in short amount of time

Hydropower- Energy produced by moving waterWind energy-

produced by moving air

Solar Power- solar radiation that reaches earth

Biomass- stored energy in organic matter

Energy

Renewable Energy

Advantages- produce few pollutants

Disadvantages- variable amounts of energy- need continuous input (sunlight, wind, running water)

Energy

Nonrenewable EnergyCan not be replenished in short amount of time

Coal- found in mines, basic source of energy for US

Natural Gas- under pressure a gas produced

Oil- formed from remains of plants and animal underground

Nuclear- splitting atoms produces heat

Energy

Nonrenewable EnergyAdvantages

- energy can be used around the clockDisadvantages

- produces pollutants- take millions of years to reproduce

Let’s practice…Try questions 10-20 on

your review packet

Now let’s talk about waves…

Waves

Waves are the means by which energy is transferred from one

point to another

There are two types of waves: transverse and longitudinal

Ex. R

ope

Ex. S

linky

Waves

Parts of a Wave

the height of the wave

Distance between two points

Frequency- the number wave that pass a point in a second

Waves

The Wave Equations

Waves

Reflection: bounce off a surface

Refraction: bend through an object

Diffraction: waves wrapping around an edge

Wave Movement

Waves

Resonance: vibrations caused by waves

Polarization: filters block out certain wavelengths and allow only certain waves through

Wave Movement

Let’s practice…Try questions 21-31 on

your review packet

Now let’s talk about the formula

chart…

Formula Chart

Every Equation You Need Can Be Found Here…

Example

Step 1: Find the important words…what are you looking for?

Step 2: Find the equation on the formula chart

Example

%E=Wo

Wix 100

80320

%E= 25 %

Example

Step 1: Find the important words…what are you looking for?

Step 2: Find the equation on the formula chart

Example

V=dt5 20

d= 100 m

Example

Step 1: Find the important words…what are you looking for?

Step 2: Find the equation on the formula chart.

mv2 2

KE =

Example

501

V=10 m/s

Example

Step 1: Find the important words…what are you looking for?

Step 2: Find the equation on the formula chart

Example

P= W

t4.75

TIME OUT!!!

We don’t have Work! W= F x d12054 x 1.8922782

P= 4796

Let’s practice…Try questions 32-41 in

your review packet

Circuits

Circuits have different components:

Power Source

WireSwitch

Bulb

Circuits

When the power is turned on the current flows from the positive to negative end of the battery.

Circuits

Series Circuits are the simplest form of circuits.

If the path is broken, no current will flow. –example: Christmas tree lights

Series Circuit

Circuits

Parallel circuits have more than one way for current to flow.

If the path is broken, current will still flow.

Parallel Circuit

Circuits

I = Current V= Voltage R= Resistance (amps) (volts) (ohms)

Ohm’s Law

I

=

VR

Circuits

I

=

VR

31.5

Let’s practice…Try questions 42-49 in

your review packet

THE END