Phase Changes
What the molecules doing?
Does it Dissolve?
Conservation of Matter
100
solid --> liquid
melting
100
when molecules are cold, what do they do?
The molecules will move closer together
100
why can't ms.parmett see the salt in the water after she mixed it together?
dissolving happened, the particles are too small to see now.
100
Mass
the weight/ the amount of matter an object has
200
liquid --> gas
evaporating
200
Which of these shows a mixture?
B
200
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Does this show dissolving?
No, the oil and the water are not combining.
200
in a phase change, will the mass/weight stay the same, increase, or decrease?
stay the same
300
gas --> liquid
condensation
300
How is a solid different than a liquid?
it has one defined shape
300
Does this show dissolving? Why?
Yes! The molecules are combining.
300
Ms.Parmett has a gatorade bottle that weighs 35g. She freezes it overnight. How much will the bottle weigh the next day?
35g
400
liquid--> solid
freezing
400
When molecules are hot, what do they do?
the molecules will move further apart.
400
Ms.Parmett says that the sugar she added to her coffee dissapears? Is she correct? How can you prove what you believe?
she is wrong. the molecules dissolved. She can evaporate out the water and the sugar will still be there.
400
Can matter be created or destroyed?
no
500
what does heat cause molecules of a solid to do?
molecules will spread apart and the solid will change phase to a liquid.
500
Beth claims that air is made up of particles too small to be seen. Beth blows air into a balloon to provide evidence that supports her claim. draw a model of what the air particles will look like inside the balloon.
500
Does this model show dissolving? Why or why not?
Yes, the molecules are attracted to one another so they are combining
500
What is the weight of the second scale after we have mixed everything together?
300.23g because matter cannot be created or destroyed.