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Lesson No: 2 Unit Title: Solutions |
Unit No:
7H |
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Lesson Title: The solution is clear (part2) |
NC Ref: |
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Objectives: MK - Filters let
liquids through, it separates solids that that do not dissolve, cannot be
used to separate soluble solids, there are a number of liquids that can
be
used as solvents SK - Some mixtures
are easier to separate, solutes may dissolve in other solvents. CK - Suspensions,
colloids, apply filtering to unfamiliar situations. |
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Lesson
outline: MK • Review last lesson with a slip test /
sudden death. • Review making tea I coffee
from
last lesson, what was the purpose of the tea bag? It separates the insoluble
part from the soluble part. In science we often want to do this.
SS54 shows
students how to fold filter paper for filtering. • Practical — Students to
filter the solutions from last lesson. • Plenary
— MK
— Filtering separates solids that do not dissolve. It
cannot be used to separate soluble solids. SK —
Some
mixtures are easier to separate than others. • Students to do wls
— MK, SK, CK
7Ha/4 Filtering CK
7Ha/7
Other types of mixture MK,
SK — additional/extension
activity • Give students a section of work surface.
Students are to draw a line on these using a selection of writing materials. • Students are to try to remove the
line using a selection of liquids. • Plenary — MK
— There are a number of liquids that can be used as
solvents. SK —
Solutes
may dissolve in other solvents. • Exploring science 7— P90/91 |
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Homework: none |
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Resources:
SS54
7Ha/4
7Ha/5
7Ha/6
7Ha/7Solutions from lesson 1, filter funnels, filter paper, conical flask, glass
rods, spatulas, 20 surface off cuts, biro, board marker, permanent marker,
wax crayon, tipex, cloths, meths,
white spirit, acetone. Exploring science 7 |
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Risk Assessment: safety glasses. Be aware of
the flammability of meths, white spirit, acetone,
exploring science 7 |
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