Download Mechanical Energy (pages 151–152)

Name
Energy
Date
■
Class
Adapted Reading and Study
Forms of Energy
Mechanical Energy
(pages 151–155)
(pages 151–152)
Key Concept: You can find an object’s mechanical
energy by adding the object’s kinetic energy and
potential energy.
• Mechanical energy is the energy an object has
because of its position and its motion.
• You can find an object’s mechanical energy by adding its
kinetic energy and its potential energy. Use this formula:
Mechanical
Potential
Kinetic
!
"
energy
energy
energy
Answer the following questions. Use your textbook and the
ideas above.
1. Read the words in the box. Use the words to fill in the
blanks in the concept map about mechanical energy.
Kinetic energy
Position
Potential energy
Mechanical energy
is a combination of
and
a.
b.
© Pearson Education, Inc., publishing as Pearson Prentice Hall. All rights reserved.
63
Name
Energy
Date
■
Class
Adapted Reading and Study
2. Circle the letter of the formula for mechanical energy.
a. Mechanical energy ! Potential energy # Kinetic
energy
b. Mechanical energy ! Potential energy " Kinetic
energy
c. Mechanical energy ! Potential energy $ Kinetic
energy
Other Forms of Energy
(pages 153–155)
Key Concept: Forms of energy associated with the
particles of objects include thermal energy, electrical
energy, chemical energy, nuclear energy, and
electromagnetic energy.
• Thermal energy is the total energy in the particles
of an object. Hot things have more thermal energy than
cold things.
• Electrical energy is the energy of electrical charges.
Lightning is a form of electrical energy.
• Chemical energy is the energy in chemical bonds. Your
body uses the chemical energy in food.
• Nuclear energy is the energy stored in the nuclei of
atoms. Nuclear power plants use nuclear energy to
make electricity.
• Electromagnetic energy travels in waves. X-rays and
microwaves are electromagnetic energy.
Answer the following questions. Use your textbook and the
ideas above.
3. Is the following sentence true or false? The particles of
objects cannot have energy.
© Pearson Education, Inc., publishing as Pearson Prentice Hall. All rights reserved.
64
Name
Energy
Date
■
Class
Adapted Reading and Study
4. Read the words in the box. Use the words to fill in the
blanks in the table about forms of energy.
Thermal energy
Chemical energy
Nuclear energy
Electromagnetic energy
Electrical energy
Type of Energy
Description
Thermal energy
total energy of the
particles in an object
a.
a.
energy stored in the
nuclei of atoms
b.
b.
energy in chemical
bonds
c.
c.
travels in waves
d.
d.
energy of electrical
changes
© Pearson Education, Inc., publishing as Pearson Prentice Hall. All rights reserved.
65