Page 5 - Class VI Worksheets Forces and Energy

SUBTOPIC: 3.6 Changes in energy & 3.7 Where does energy go?

1 a) Provide an example of a process that converts chemical energy to thermal energy, and
describe the outcome of this conversion.
b) Explain the energy transformaUon when an object falls from a height.
c) What are the different energy conversions when people walk upstairs?
d) Explain the various forms of energy involved in the conversion process at a power
staUon.

2 a) How is energy transferred or changed when fuel is used to move vehicles, and what are
the different forms of energy it can be transformed into? Are those other forms useful
or wasteful?
b) What occurs during the process when lamps convert one form of energy into another,
and why is there a percepUon that some of the energy involved is not fully uUlized?

3 a) What distinguishes wasted energy from useful energy in the context of energy transfer
and conversion?
b) What are the two forms of energy that can’t be easily recovered and reused?

4 I. IdenUfy the types of energy stored in each of the following objects. Note that there
may be more than one type for each:
a. A charged badery
b. A compressed spring
c. A speeding car
d. A stretched rubber band
II. Describe the useful energy change in each of these devices:
a. A refrigerator
b. A bicycle
c. A microwave oven

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