Page 62 - Science Course 1 (Book 2)

Mo8-L4a: How is Energy Transformed and Transferred?

Closed System
a system that does not exchange matter or energy
with the environment.

A tree changes radiant energy to chemical energy

Let’s Begin

Law of Conservation of Energy

The law of conservation of energy says that energy
can be transformed from one form to another, but it An electric mixer changes electrical energy to
cannot be created or destroyed mechanical and heat energy.

The law of conservation of energy indicates that the
amount of radiant energy that shines out of the
f ashlight cannot be greater than the chemical
energy stored in the battery.

An automobile engine changes chemical energy
to mechanical and heat energy.

• Bulb - electric energy converted to radiant
energy (light) and thermal energy.

• On/Off Switch - completed the electric con-
nection when turned on.
A thermonuclear reaction changes nuclear energy
to radiant and heat energy • Batteries - Stored chemical energy.

• Contact Strip - usually copper or brass,
carries current through the battery.

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