Question

1.12) ______ what happens to energy when a person eats an apple with sugar in it and then walks?
a. the energy changes from mechanical to chemical.
b. the energy changes from mechanical to kinetic.
c. the energy changes from chemical to mechanical.
d. the energy changes from kinetic to chemical.

match the types of energy with the descriptions.
1.13) ______ potential
1.14) ______ kinetic
1.15) ______ light
1.16) ______ sound
1.17) ______ electrical
1.18) ______ heat
1.19) ______ mechanical
1.20) ______ chemical

a. energy that travels in such a way that people can hear it
b. stored energy
c. energy that flows through a wire or through an electric current
d. energy in motion
e. energy that comes from chemical reactions
f. energy that moves from hot objects to cooler objects
g. the total potential and kinetic energy of an object
h. also known as radiant energy

Explanation:

First Question (Multiple Choice)

When a person eats an apple (with sugar), the sugar has chemical energy (stored in chemical bonds). When the person walks, this chemical energy is converted into mechanical energy (used for movement). Option A is wrong (mechanical to chemical is reverse). Option B is wrong (mechanical to kinetic is incorrect as kinetic is a type of mechanical, and the source is chemical). Option D is wrong (kinetic to chemical is reverse). So the correct option is C.

Potential energy is defined as stored energy. So it matches with B.

Kinetic energy is energy in motion. So it matches with D.

Answer:

C. The energy changes from chemical to mechanical.

Matching Questions

1. 1.13 Potential