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States of Matter
Review:
What are the three states of matter?
States of Matter
States of Matter
From your worksheet:
1. Three items you found easy to classify
2. Three items you found more difficult to classify.
3. How did you sort the items?
States of Matter
Solid: has a definite shape and volume.
The shape of solid matter does not depend on the shape of the container holding it.
Liquid: flows, has a fixed volume, and takes the shape of its container.
Gas: takes the shape and volume of its container.
Plasma: found in outer space
comes mostly from stars, and helps cause the northern lights.
States of Matter
Solids do not change their shape or volume depending on their container.
How do you think life would be different if they did change their shape and volume easily?
States of Matter
What are the words called when we go from one to the other?
States of Matter
What temperature do you think water freezes at?
What temperature do you think ice melts at?
What temperature do you think water boils at?
States of Matter
What temperature is the fridge?
What temperature is the freezer?
What temperature is the water when the kettle turns off?
States of Matter
All substances have a melting point and a boiling point.
The melting point of water is 0 degrees Celsius.
The boiling point of water is 100 degrees Celsius.
States of Matter
Change of State What Happens
Solid changes to a liquid.
Liquid changes to a gas.
Gas changes to a liquid.
Liquid changes to a solid.
Solid changes to a gas.
Gas changes to a solid.
Copy this chart down and try to fill it in on your own before we go over it together.
States of Matter
Together, let's fill in the blanks of this story:
A _________________ gently floated down from the sky on a cold,
winter evening. It lay on the ground in the _______________ state
until spring. Then, as the temperature warmed up, the snowflake
_____________________, changing into the _______________
state. It turned into _____________________ and flowed into a
puddle in the yard. Soon, the temperature warmed up even more
and the ground became very hot. The drop of water in the puddle
____________________ and changed into the __________state.
It was now ______________________. Moving into the sky, the
water vapour floated around and evnetually cooled,
________________________, and changed into the __________
state. it fell back to Earth as a _______________. The water cycle
had been completed once again :).
States of Matter
States of Matter
Reversible and NonReversible Changes
What do these two words mean?
What is a change that could be reversible?
What is a change that would be nonreversible?
States of Matter
Melting an ice cube is a change of state.
It goes from a ____________ state to a _________________state.
Is this reversible? How do you know?
States of Matter
We heated the ice cube to make water, and it was reversible.
Is the same true if I heat a marshmallow?
States of Matter
Reversible means you can change a substance back to the way it was before the change of state happened.
It also means its characteristics do not change.
If I cut a piece of paper in half, I can't exactly put it back together without tape, but I haven't changed the properties of the paper.
Nonreversible means that a new product is formed after the substance goes through a change of state.