phase changes
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Lesduur is: 30 minOnderdelen in deze les
Slide 1 - Tekstslide
Slide 2 - Tekstslide
which phase does not have a fixed volume?
A
solid
B
liquid
C
gas
D
magma
Slide 3 - Quizvraag
Slide 4 - Tekstslide
what do we mean by adhesion?
A
The attraction between molecules of the same substance
B
the attraction between molecules of different substances
Slide 5 - Quizvraag
Slide 6 - Tekstslide
How do we call the phase change from gas into solid?
Slide 7 - Open vraag
How do we call the phase change from liquid into solid
Slide 8 - Open vraag
Slide 9 - Tekstslide
The melting point of parafine is 69C. Calculate the temperature in K
Slide 10 - Open vraag
sea water (salty water) has a lower freezing point than plain water. It is 260K. Calculate the temperature in C.
Slide 11 - Open vraag
Slide 12 - Tekstslide
why does a hot air balloon fly?
A
heated air always rises
B
the density of heated air is smaller
C
the density of heated air is bigger
D
it must be magic
Slide 13 - Quizvraag
what has the bigger density: liquid water or ice?
A
ice, because it is a solid
B
ice, because it is colder
C
water, because ice floats on water
D
water, because it is a liquid
Slide 14 - Quizvraag
Slide 15 - Tekstslide
Slide 16 - Tekstslide
Which liquid has the greater density: water at 0 °C or water at 2 °C? Explain your answer
A
water at 0 °C
B
water at 2 °C
Slide 17 - Quizvraag
why does a puddle of water evaporates, even at room temperature?
A
it doesn't. The water must boil first
B
water always evaporates, independent of temp
C
water can evaporate at the surface
D
it depends on air pressure
Slide 18 - Quizvraag
Slide 19 - Tekstslide
whhh
A
both liquids are pure substances
B
both liquids are mixtures
C
the left liquid is a mixture, the right is a pure substance
D
the left liquid is a pure substance, the right is a mixture
