Year 7 Term 1 2014: Chemical WorldThe Nature of Matter
Check
Date
Revise assumed knowledge:
ST3-12MW
identifies the observable properties of solids, liquids and gases, and that changes
made to materials are reversible or irreversible
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ST3-13MW
describes how the properties of materials determine their use for specific purposes
CW1 The properties of the different states of matter can be explained in terms of the motion and
arrangement of particles.(ACSSU151)
4CW1a. describe the behaviour of matter in terms of particles that are continuously
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moving and interacting
Literacy activity (ESL focus): Define and describe.
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Solid, liquid, gas, atom, element, compound
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Introduce states of matter – solid liquid gas. Describe the properties of each state
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The particle model of matter
– Contributions of Democritus and Dalton that led to the current understanding of
matter
– Basic structure of the atom
– Particle arrangements and behaviour in each state
– Draw diagrams
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Plasma: the fourth state of matter
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first-hand investigation(s): Compression test
Fill 3 syringes; one with air, one with water and one with solid (eg sand). Pass
around class and ask students to place finger over end and try and compress.
Explain observations
Demonstration: Comparing the States of matter
To investigate the behaviour of solids, liquids and gases in terms of its mass, ability
to take shape of the container, ability to be compressed and other observable
characteristics. Deodorant can or gas tap turned on.
4CW1b. relate an increase or decrease in the amount of heat energy possessed by
particles to changes in particle movement
Literacy activity (ESL focus): Define and describe.
Energy, heat, temperature, melting, boiling, dependent, independent and control
variables, hypothesis, aim, methods, equipment, observation, results, discussion,
conclusion, inference, reliability, validity, fair-test
Heat energy and particle movement
– Particle energy and diffusion
– Particle pressure
– Melting point
– Boiling point
Energy is the capacity of a physical system to perform work. Heat is thermal energy.
Temperature is the measurement of average kinetic energy of the particles which
compose the matter.
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first-hand investigation(s): Heat v’s Temperature
Heat nail until red hot. Place in 100mL H2O. Record change in temperature. Heat
range of other metal cubes for same length of time as nail and measure temperature
changes. Discuss heat v’s temperature. 4.18J 1mL water 1oC
first-hand investigation(s): Conduction. Copper, Brass, Iron
Place thumb tacs (using wax) at 5cm intervals along a copper rod held horizontally
above Bunsen burner. Apply heat and record time for each tac to fall off. Repeat for
Brass and Iron.
4CW1c. use a simple particle model to predict the effect of adding or removing heat
on different states of matter
Literacy activity (ESL focus): Define and describe.
Expand, contract, heating, cooling
Heating and Kinetic theory of matter
– Expanding and contracting
– Describe general relationship between heat energy, kinetic energy of particles
and changes in physical properties of substances
– Draw particle diagrams to show the effect of heating and cooling on the three
states of matter.
first-hand investigation(s): States of matter
Place thermometer in beaker of ice. Record temperature. Apply heat using Bunsen
burner and record temperature every minute for 20 minutes. Graph results. Explain
latent heat.
first -hand investigation(s): To see the effect of heating and cooling a metal solid.
(Ball and ring). Explore the application of heat and water on both the ring and the
ball.
first -hand investigation(s): To determine the effect of heating and cooling a liquid.
(coloured water, narrow glass tube and conical flask). Changes in the level of water
in the narrow tube on application of heat and removal of heat to the conical flask.
First-hand investigation(s): To determine the effect of heating and cooling a gas.
(Balloon on conical flask – in hot water and cold water or ice bath). Inflation and
deflation of balloon on addition and removal of heat
4CW1d. relate changes in the physical properties of matter to heat energy and
particle
movement that occur during observations of evaporation, condensation, boiling,
melting and freezing
Literacy activity (ESL focus): Define and describe.
Evaporation, condensation, boiling, melting and freezing
first-hand investigation(s): Cloud making
Half fill a large beaker with water and insert a smaller empty beaker inside the
larger beaker. Place a watchglass over the large beaker and sit an ice cube on top of
the watchglass. Heat the water and observe carefully (watch for clouds forming).
Explain all observation in terms of physical properties of matter, heat energy and
particle movement that occur
4CW1e. explain density in terms of a simple particle
Literacy activity (ESL focus): Define and describe.
Density, weight, volume
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first-hand investigation(s): Density
Determine the density of a range of metal cubes (1x1x1cm). Graph results.
Literacy activity: COSMOS.
Skin deep by Elizabeth Finkel: Issue 19 pg64. Read, review article and answer
questions provided OR students research for another related article. Students then
write a series of questions that MUST include 5 multiple choice, 2 identify, 2
describe, 1 explain and either 1 assess or evaluate.
4CW1f. identify the benefits and limitations of using models to explain the
properties of solids, liquids and gases
Modelling Matter:
Students construct models to represent the particle arrangement in the three states
of matter using materials of their choice
Discuss the general advantages and disadvantages of models in science
Identify the benefits and limitations of using models to explain the properties of
solids, liquids and gases
4CWadd6 Explain the changes in pressure of gases in terms of increases or
decreases in the frequency of particle collisions.
Literacy activity (ESL focus): Define and describe.
Pressure
Explain the changes in pressure of gases in terms of increases or decreases in the
frequency of particle collisions
TOPIC TEST
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