OpenStax-CNX module: m20190
1
To be able to describe electrical
energy as a form of energy
∗
Siyavula Uploaders
This work is produced by OpenStax-CNX and licensed under the
†
Creative Commons Attribution License 3.0
1 NATURAL SCIENCES
2 Planet earth and the universe
3 Dierent forms of Energy
4
5 EDUCATOR SECTION
6 Memorandum
1. (a) Refrigerator
(b) Vacuum cleaner
(c) Drill
(d) Hair drier
(e) Toaster
(f) Egg-beater
(g) Small lamp
(h) Radio/CD player/cassette player
2. Any correct examples are acceptable
(a) Milk and meat in sealed wooden barrel or metal container, in streamlet or river
(b) Broom
(c) Little hole with hand drill, or nail knocked in, or glowing iron bar
(d) Towel or sun
(e) Grilled over open re
(f) Whisked with fork
(g) Candles or lamps
(h) Made own music (played instruments)
∗ Version
1.1: Mar 12, 2009 1:56 am -0500
† http://creativecommons.org/licenses/by/3.0/
http://cnx.org/content/m20190/1.1/
OpenStax-CNX module: m20190
2
7 LEANER SECTION
8 Content
9 Activity: To be able to describe electrical energy as a form of energy [LO 3.1]
• This form of energy is most widely used in everyday life.
Study the sketches of the dierent appliances and answer the questions that follow:
Figure 1
1. Identify and list the names of the dierent appliances.
(a)__________________________________________________________________
(b)__________________________________________________________________
(c)__________________________________________________________________
(d)__________________________________________________________________
(e)__________________________________________________________________
(f)__________________________________________________________________
(g)__________________________________________________________________
(h)__________________________________________________________________
2. Which techniques or methods were used in earlier days to do the tasks for which these appliances are
used nowadays?
(a)__________________________________________________________________
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OpenStax-CNX module: m20190
3
(b)__________________________________________________________________
(c)__________________________________________________________________
(d)__________________________________________________________________
(e)__________________________________________________________________
(f)__________________________________________________________________
(g)__________________________________________________________________
(h)__________________________________________________________________
CRITERIA
All appliances identied correctly
Ideas about the past reveal creative thinking
Ideas are substantiated well
YES
_____
_____
_____
NO
_____
_____
_____
Table 1
10 Assessment
The learner will be able to demonstrate an understanding of the interrelationships
between science and technology, society and the environment.
Assessment Standard 3.1: We know this when the learner understands Science and Technology in
the historical context.
Learning Outcome 3:
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