Download Warm UP - 7th Grade Science

WARM UP
• What form of energy is in foods?
• What is the source of the energy in food?
CH. 12 USING ENERGY
AND HEAT
Lesson 1: Forms of Energy
ESSENTIAL QUESTIONS
• How do potential and kinetic energy differ?
• How are mechanical energy and thermal energy similar?
• What two forms of energy are carried by waves?
CAN YOU TRANSFER ENERGY?
ACTIVITY
• Hold the handle of the tuning fork and gently strike one arm of it with a
mallet.
• Dip the arms of the tuning fork into a beaker of water.
• Observe what happens.
• What happened when the tuning fork was put into the beaker of water?
• Why do you think that happened?
• What produced the sound that was hear?
ENERGY – THE ABILITY TO CAUSE
CHANGE
• What are some examples of different forms of energy cause change?
• What is the definition of energy?
• Does the book have energy?
ENERGY – THE ABILITY TO CAUSE
CHANGE
• What are some examples of different forms of energy cause change?
• What is the definition of energy?
• The ability to cause change
• Does the book have energy?
• BrainPOP- Forms of Energy
POTENTIAL ENERGY – STORED ENERGY
DUE TO THE INTERACTION BETWEEN
OBJECTS OR PARTICLES
• Objects have potential energy if they have the potential (possible) to cause
change
• Objects fall due to gravity
• Particles move due to electrical or magnetic forces
• BrainPOP – Potential Energy
POTENTIAL ENERGY
• Gravitational Potential Energy – if has mass and height above
Earth’s surface
• Determined by mass of object and distance the object is from
Earth
• What’s an example of this?
• Chemical Energy – the energy stored in and released from the
bonds between atoms
• What is an example of this?
• Nuclear Energy – energy stored in and released from the
nucleus of an atom
• What’s an example of this?
• BrainPOP – Nuclear Energy
WARM UP
• What is kinetic energy?
KINETIC ENERGY – ENERGY DUE TO
MOTION
• Kinetic energy related to the mass and speed of the object
• Electric Energy – energy in an electric current caused by electrons moving
• What must occur before the energy in food can be released?
• What objects in the classroom use kinetic energy?
• BrainPOP – Kinetic Energy
• How do potential energy
and kinetic energy differ?
COMBINED KINETIC AND
POTENTIAL ENERGY
• Mechanical Energy – the sum of the potential energy and the kinetic energy
in a system
• What is a system?
• Thermal Energy – the sum of the kinetic energy and the potential energy of
the particles that make up the object
• How do mechanical energy and thermal energy compare?
ENERGY CARRIED BY WAVES
• Wave – a disturbance that transfers energy from one place to another
without transferring matter
• When a raindrop hits the water it’s energy that causes the waves
• Sound energy – energy carried by sound waves
• Radiant Energy – energy carried by electromagnetic waves
• Eletromagnetic waves travel through matter
• Often described by their wavelengths (distance from one point on a wave to
the next point just like it)
FOLDABLE
• Fold a piece of paper into 4 equal sections
• Title each section as follows:
•
•
•
•
Kinetic Energy
Potential Energy
Both Kinetic and Potential Energy
Energy from Waves
FORMS OF ENERGY