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Inside Collection (Course): Natural Sciences Grade 5
ACTIVITY:
Energy and water: To explain the wonderful nature of water
[LO 1.2.1; LO 1.3; LO 2.1]
Where in nature do we find water?
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Deduction from the diagram: water occurs in nature as solid, liquid and gas.
Demonstration by educator to illustrate the effect of energy on water:
a pot
a container filled with ice cubes
a glass
a gas stove
matches
heat the ice. What happens?
The solid substance has changed to a .
The liquid changes to a .
solid energy
liquid thermal energy
gas flame-energy
particles evaporation
move condensation
What happens when condensation cools down?
Use a dry glass. Fill it with ice cubes and leave it to stand for a while. What do you notice on the outside of the glass?
What happened?
Complete:
The in the air CONDENSED against the cold surface
of the glass and formed . This happened because
the particles of the lost a substantial amount of
and therefore experienced less movement.
Collect the drops that form against the glass in a small bowl and place it in a freezer. What happens?
Fill in energy gain or energy loss:
SOLID LIQUID GAS
GAS LIQUID SOLID
LEARNING OUTCOME 1:SCIENTIFIC INVESTIGATIONSThe learner will be able to act confidently on curiosity about natural phenomena and to investigate relationships and solve problems in scientific, technological and environmental contexts.
ASSESSMENT STANDARDS
We know this when the learner:
1.2.1 follows instructions for setting up apparatus and executing observations;
1.2.2 collects data from observation by means of sketches and labels;
1.2.3 perseveres until a result is obtained or continues to observe over an extended period of time;
1.3 evaluates data and communicates findings: provides feedback on progress in group context, as well as the eventual result:
1.3.1 presents data obtained from observation that are relevant to the target question.
LEARNING OUTCOME 2:ConstructinG scienCE knowledgeThe learners will know and be able to interpret and apply scientific, technological and environmental knowledge.
ASSESSMENT STANDARDS
We know this when the learner:
2.1 recalls meaningful information: the minimum requirement is the ability to describe the features and characteristics of objects, materials and organisms in simple terms.
2.1.3 say whether energy can be converted from one form to another.
Activity
Demonstration by educator:
2. The ice melts; a liquid
3. The water boils and water vapour is formed.
4. The water boils away.
5. Ice is water in solid form; the particles have little energy and therefore they move only slightly; when it is heated the flame supplies heat energy, the particles acquire energy and move away from each other and the ice melts and becomes a liquid (water); the liquid particles acquire more energy, they move so much that they form a gas (water vapour). Evaporation takes place as a result.
A vapour forms against the glass. The particles of the water vapour in the air lost energy when they came into contact with the cold glass, and they formed water against the glass.
Complete:
Refresh memory:
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Last edited by Siyavula Uploaders on Mar 14, 2009 9:25 am -0500.