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).
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 C?
At point C, the substance is a liquid.
It is heating up (its temperature is increasing).
What unit is energy measured in?
Energy is measured in joules (J).
What unit is temperature measured in?
Temperature is measured in degrees celsius (°C).
Temperature can also be measured in kelvin (K).
Which quantity is represented by the symbol F?
F = force
Explain, in terms of particles, what happens to the pressure of a gas when its temperature is increased.
When the temperature of a gas is increased, the pressure increases.
- The particles gain energy
- The particles move faster
- The particles collide with the container walls more often and with greater force
Which quantity is represented by the symbol c?
c = specific heat capacity
What does the prefix µ stand for?
µ stands for micro
micro = x10-6
What does the prefix G stand for?
G stands for giga
giga = x109
What is the definition of the term pressure?
Pressure is defined as the force per unit area.
Describe how to convert a temperature in degrees celsius into kelvin.
To convert a temperature from degrees celsius into kelvin, add 273.
What does the prefix M stand for?
M stands for mega
mega = x106
A substance is heated up in a science experiment. The substance is a solid to begin with.
What is the boiling point of the substance (temperature where it changes from liquid to gas)?
The boiling point of the substance is 130 ºC.
Which quantity is represented by the symbol m?
m = mass
A substance is heated up in a science experiment. The substance is a solid to begin with.
What is the melting point of the substance (temperature where it changes from solid to liquid)?
The melting point of the substance is 60 ºC.
