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 Energy can be replenished in short amount of time Hydropower- Energy produced by moving water Wind 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 Energy Can 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 Energy Advantages - energy can be used around the clock Disadvantages - produces pollutants - take millions of years to reproduce

Let’s practice… Try questions 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. Rope Ex. Slinky

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 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 = WoWo WiWi x %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=V= d t 5 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.

mv 2 2 KE = Example 50 1 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 t 4.75 TIME OUT!!! We don’t have Work! W= F x d x P= 4796

Let’s practice… Try questions in your review packet

Circuits Circuits have different components : Power Source Wire Switch 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= VoltageR= Resistance (amps)(volts)(ohms) Ohm’s Law I= VRVR

Circuits I= VRVR 3 1.5

Let’s practice… Try questions in your review packet

THE END