Chemistry, 22.02.2021 14:40 alexsrules9711
1. A learner investigates three types of roofing
materials: galvanised iron roofing with a ceiling,
thatched roofing and galvanised iron roofing.
The learner used cardboard to make three
model houses of the same size. He put a
thermometer in each of the models and put
all three model houses outside in the sun. He
measured and recorded the temperature in each
model house every 5 minutes for 30 minutes.
a) State a possible hypothesis for this
investigation.
b) Why did the learner make the model
houses all the same size?
c) State the independent, dependent and
constant variable in this investigation.
Answers: 2
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Is a pencil falling to the floor anon contact force, a force, or a contact force
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Draw the lewis dot structure for each of the following polyatomic ions
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Count the number of each type of atom in the equation below, and then balance the equation. write in the numbers of atoms and coefficients. add a 1 if there should be no coefficient. cs2(l) + o2(g) → co2(g) + so2(g) c [ ] s [ ] o > c [ ] s [ ] o [ ] cs2(l) + [ ] o2(g) > [ ] co2(g) + [ ] so2(g)
Answers: 3
1. A learner investigates three types of roofing
materials: galvanised iron roofing with a ceiling,...
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