Properties of Matter Flashcards
A substance is heated up in a science experiment. The substance is a solid to begin with.
In the graph of temperature versus time, what is happening in the section labelled D?
The substance is changing state from liquid to gas.
(the substance is boiling)
What does the prefix k stand for?
k stands for kilo
kilo = x 103
Round off this number to 3 significant figures.
1,526.33
1,526.33 rounded off to 3 significant figures is
1,530
(the ‘2’ has been rounded up to 3)
What unit is volume measured in?
Volume is measured in metres cubed (m3).
A substance is heated up in a science experiment. The substance is a solid to begin with.
In the graph of temperature versus time, what is happening in the section labelled B?
The substance is changing state from solid to liquid.
(the substance is melting)
Name the three quantities shown in this formula.
Eh = energy
m = mass
l = latent heat
Round off this number to 3 significant figures.
6.22789
6.22789 rounded off to 3 significant figures is
6.23
Round off this number to 3 significant figures.
3.14159
3.14159 rounded off to 3 significant figures is
3.14
Which quantity is represented by the symbol Eh?
Eh = heat energy
Explain how a snowshoe works
(in terms of pressure, force and area).
A snowshoe spreads a force over a larger area - this causes the pressure on the snow to decrease.
What does the prefix n stand for?
n stands for nano
nano = x10-9
A substance is heated in a science experiment. The substance is a solid to begin with.
In the graph of temperature versus time, what is happening in the section labelled E?
At point E, the substance is a gas.
It is heating up (its temperature is increasing).
Round off this number to 3 significant figures.
0.0025668
0.0025668 rounded off to 3 significant figures is
0.00257
What does the prefix m stand for?
m stands for milli
milli = x10-3
What unit is pressure measured in?
Pressure is measured in pascals (Pa).