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What is magnetism ? Force of attraction and repulsion
What causes magnetism ? The spin of electrons
Where is the strongest point in a magnet? The poles
What happens to the magnetism of a wire carrying electricity if you add more coils? It becomes stronger
What is the magnetic field? The space around a magnet
How can we create a magnet? Rub a piece of iron with a magnet in one direction Attach a piece of iron to a magnet Use electricity
What is the magnetosphere ? Field around the earth
How does the earth’s magnetic field help us? Protects us from the sun
Draw the north pole next to the south pole of two magnets ? they attract one another
Where is the electric field of a charged object the strongest? On the outside (surface) of an object
What charge does an object have if it doesn’t have enough electrons on it? positive
How do you make an electric field stronger? Take away negative or Add positive
Draw the electric field around two positive objects? They repel
What happens when two objects that have opposite charges come near each other? They attract each other
What is the rule of charges? Opposites attract, Same repel
What charge does an object have if it has too many electrons on it? Negative
What is the electric field? Area around a charged object
Draw the electric field around a negative object ?
What happens when two objects that have the same charge come near each other? They repel each other
How much current can be pushed through a 5 ohm resistor if the voltage is 10 volts? V = I x R 10 = I x 5 10/5 = 2 amps
What is the symbol for current?
What is a wet cell ? A battery that has liquid inside
What are the electrons doing an AC wire ? The electrons are going back and forth
What is the voltage in your house wiring ? 120
What is current? A flow of electrons
What is a voltage? Push of electrons
What is resistance? Friction to electrons moving
What are 3 ways to transfer heat ? Convection Conduction Radiation
Give an example of heat transfer by radiation ? putting your hand by your forehead
Give an example of heat transfer by conduction ? Pan on a burner of stove
Give an example of heat transfer by convection ? Hand over a radiator
What are insulators ? Something that slows down heat transfer
What is heat ? Energy of molecules in motion
What happens to the molecules of a liquid as heat is added to it? Molecules speed up
What are conductors ? Substances that allow electrons or heat to go through them (tend to be metal)
What happens to the molecules of a hot object if it touches a cold object? They slow down
Why can’t we say that heat rises ? Objects rise – not energy
What units is heat measured in? Joules and Calories
What is temperature in terms of molecules ? How fast molecules are moving
What do we use to measure temperature ? thermometer
What is the Celsius thermometer based on? Freezing = 0 degrees Boiling = 100 degrees
What is the Kelvin thermometer based on? The speed of molecules
Why can’t there be a temperature below zero degrees Kelvin? Because molecules stop at zero
Why do bridges have expansion joints ? To protect from cracking in hot weather and pulling apart in cold weather
Why is it that most materials expand when heated? Molecules move faster and further away from each other
Why does water expand when cooled to zero degrees Celsius? Water freezes and traps space between molecules
Heat Chapter 9 Thermal Energy. Kinetic and Potential Energy Kinetic energy- energy of motion potential energy – Is the certain amount of energy that Molecules.
HEAT 3 RD Grade Science Chapter 4. Essential Questions What is heat and how is it measured? How does thermal energy move? How is thermal energy used?
Heat A Form of Energy Molecules and Motion The motion of atoms or molecules is called thermal energy. The more motion, the more energy.
Place the 2 groups of objects below in order from coldest to hottest. 1. Cheese, popsicle, napkin 2.Bonfire, napkin, fried egg What do you think?
Heat A Form of Energy Molecules and Motion The motion of molecules produces heat The more motion, the more heat is generated.
HEAT. What do you think this photograph shows? ENERGY of HEAT It takes heat to shape glass or to make a cup of tea.
Chapter 10 Heat and Temperature. Temperature How hot or cold something is. How hot or cold something is. What make something hot? What make something.
Chapter 13 Electricity. Charge and Force All matter is made of atoms that contain electrons, neutrons, and protons All matter is made of atoms that contain.
ELECTRICITY & MAGNETISM. MAGNETISM Invisible force of push or pull by an object with this property Wagon does not move; forces are not lined up Wagon.
Chapter: Thermal Energy Table of Contents Section 3: Engines and RefrigeratorsEngines and Refrigerators Section 1: Temperature and Thermal Energy Section.
Thermal Energy Temperature and Thermal Energy Chapter 15.
States of Matter. What three things are made of matter? Solids, liquids, gases.
ElectricitySection 2 Voltage and Current How are electrical potential energy and gravitational potential energy similar? Just as a ball will roll downhill,
Unit 10 - Electricity. What is electricity? Electricity – form of energy caused by moving electrons.
Electricity and Magnetism SPS10. Students will investigate the properties of electricity and magnetism. a.Investigate static electricity in terms of: friction,
Electricity & Magnetism Static, Currents, Circuits Magnetic Fields & Electro Magnets Motors & Generators.
Vocabulary & Essential Question Test Review. Minute to Win It 10.1 Energy transformations 1. The temperature at which a substance turns into a solid 2.
In a lab where there wasnt much action Two magnets supplied some distraction. So they matched opposite poles And now theyre quite an attraction.
What is energy? Energy – is the ability to cause changes in matter. Changing states of matter is a good example. Solid LiquidGas Activity.
Electricity & Magnets S5P3 Students will investigate electricity, magnetism, and their relationship a.Investigate static electricity b.Determine the necessary.
ElectricitySection 1 Electric Charge What are the different kinds of electric charge? An object can have a negative charge, a positive charge, or no charge.
Unit 6 Heat. What is heat? heat – form of energy in moving particles of matter.
Magnetism. What are magnets? Let’s first start off with what causes an magnetic field… A magnetic field is created around any moving charged object.
ElectricityElectricity. What do atoms contain? Charged particles.
10 pt 15 pt 20 pt 25 pt 5 pt 10 pt 15 pt 20 pt 25 pt 5 pt 10 pt 15 pt 20 pt 25 pt 5 pt 10 pt 15 pt 20 pt 25 pt 5 pt 10 pt 15 pt 20 pt 25 pt 5 pt.
May-14General Science Chapter 141 Heat and Temperature Chapter 14.
Chapter 14 Magnetism. Properties of Magnets You can investigate the properties of magnets by bringing two magnets together. You can investigate the properties.
Chapter 20 Electricity. Chapter 20 *Electric charge- property that causes subatomic particles such as protons and electrons to attract or repel each other.
Introduction: Transfer of Heat. Heat A form of energy associated with the motion of atoms or molecules. Transferred from higher temperature objects.
Energy the ability to do work or to change something used whenever the location, makeup or look of something changes.
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