5th grade chapter 14 section 1 - what is energy
TRANSCRIPT
CHAPTER 14 LESSON 1
ENERGY
–the ability to do work or cause a change
• There are many forms of energy.
ex: sound, light, electricity,
and magnetism
• Energy cannot be made or destroyed.
• However, it can move from one object to another.
• Energy can also change from one form to another
• Every time energy changes form, some energy is given off asunusable heat.
KINETIC ENERGY–energy due to motion
• The amount of kinetic energy in a moving object depends on its speed and its mass.
• The faster an object moves, the more kinetic energy it has.
• The more mass an object has, the more kinetic energy it has.
• Kinetic energy can change into different forms of energy. A windmill changes the kinetic energy of wind into electric energy.
• When a drumstick hits a drum, kinetic energy becomes sound energy
• Kinetic energy can also change into thermal energy.
–Ex: rub your hands together, they get warmer
POTENTIAL ENERGY
–energy that is not causing any changes now, but could cause changes in the future.
• sometimes called stored energy
CHEMICAL ENERGY
–energy of the electrons that form the bonds between atoms in molecules
CHEMICAL ENERGY• When fuel is burned in a car
or power plant, chemical energy is changed.
• Heat and light are produced.
• Some fuels have more energy than others.
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AppleBananaOrangeHot DogMilkBread SliceEggBrownieIce CreamChoc. MilkPotatoBagel
Amount of Calories
CHEMICAL ENERGY & YOU
• There are several units that are used to measure heat energy.
• A kilocalorie is the amount of energy needed to raise the temperature of 1 liter of water 1 degree Celsius.
NUCLEAR ENERGY
–related to the structure of atoms. All atoms contain even tinier particles called protons, neutrons, and electrons
NUCLEAR ENERGY
• In nuclear power plants, released nuclear energy heats water until it changes into steam.
• The steam turns a turbine that generateselectrical energy.
ENERGY
–the ability to do work or cause a change
• There are many forms of energy.
ex: sound, light, electricity,
and magnetism
KINETIC ENERGY–energy due to motion
• The amount of kinetic energy in a moving object depends on its speed and its mass.
• The faster an object moves, the more kinetic energy it has.
• The more mass an object has, the more kinetic energy it has.
POTENTIAL ENERGY
–energy that is not causing any changes now, but could cause changes in the future.
• sometimes called stored energy
CHEMICAL ENERGY
–energy of the electrons that form the bonds between atoms in molecules