Chemistry |
Lesson
8: Alternative sources of energy
|
Curriculum
Key: |
AQA
12.2 |
|
OCRB
C2 |
Edexcel
Topic 7 |
Objective(s)
1.
Learn about ethanol and its use
as a fuel.
2. Appreciate that ethanol is
already used as a fuel in some
countries.
|
Resources
needed
PowerPoint
(if desired).
Pupil worksheets.
Experiment apparatus and fuels. |
Starter:
5-10
minutes What
is a fuel/what makes a good fuel?/what
fuels do we use?
What's the problem, why do we
need an alternative? Give facts
on ethanol. A PowerPoint is provided
showing some uses of alternative
energies. |
Teacher
input/assessment
Introduce
the topic (if desired use the
PowerPoint). |
Main
Activity 1: 20-25
minutes Can
we test ethanol as fuel? What
criteria would they need to apply
to test it/ What would they compare
it with? (e.g. HOW LONG IT BURNS
FOR/energy produced (e.g. like
the crisps as a fuel experiment,
raising the temperature of a boiling
tube of water)
Carry out a practical as on the
resource sheet (note safety advice
in teacher notes).
|
Teacher
input / assessment
Allow
the students to work safely in
small groups.
Circulate around the lab.
|
Plenary:
15
minutes Evaluation
skills - what was bad/good/is
it a good alternative fuel. Class
discussion of the good and bad
points of the practical. Introduce
the report. Consider making the
report only 2 pages of A4 long.
Complete next lesson. Complete
reports and peer assess the report
based on the marking criteria:
see the worksheet for this task |
Teacher
input / assessment
Set
the scene for writing up the investigation
report. Talk through the peer
assessed marking criteria (this
would be a good activity to pre-empt
an Sc1 activity). |
Learning
Outcomes: All
students must: be
able to recall some facts about
ethanol. Most
students should: be
able to carry out a safe experiment
to investigate ethanol as a fuel
and produce a report.
Some
students could: a
detailed report to evaluate the
benefits and drawbacks of ethanol
as a fuel |
Key
Skills: Use
of appropriate scientific language,
safety, peer assessment
Key
words: ethanol,
fuel, efficiency Homework:
Start
write up of experimental report
ready for peer assessment
|
Differentiation:
More
able: will
fully appreciate the need for
alternative fuels and write up
an accurate, concise report.
Less
able: will
perform a safe experiment and
write it up – appreciate some
facts about ethanol. |