Try holding an ice cube for a few minutes. Pretty soon your hand will start to feel a chill because the ice is pulling heat away from your hand and on to itself. And once the heat hits the ice, it will be a puddle you're holding instead of a cube.
What you just experienced, and witnessed, was a phase-of-matter change, as the ice cube switched from a solid to liquid. If you can manage to put that puddle you're holding into a pot on the stove and then turn on the burner, you'll be adding more heat, and the water will turn into steam, which is water in its gas form. Or you can stick the puddle back in the freezer, and the heat removed will turn the water back to ice.
Watch this video to find out more about how matter can change from a solid to a liquid to a gas and back again. Then, answer the question under Take Notes, below.
You may read the transcript to the video, and watch it as many times as you like.
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That’s what happens when you forget about an ice cream cone. Frozen deliciousness, dripping away.
BIG mistake.
But it’s not a mistake, of course, if the person with the ice cream cone happened to be thinking about the phases of matter, and that person decided to put thought into practice and watch a solid turn into a liquid. That’s what happens when the temperature rises.Because when it comes to matter and what phase it's in--solid, liquid or gas--it's always about the heat..
Warm up a solid ice cube, you get water.
Turn a burner on under a pot of water, and you get steam.
And when the temperature is lowered?
The phase of matter still changes, but in reverse.
Gas becomes liquid becomes solid..
It works for ice cream also, sort of.
But if we're being honest, nothing's going to save that cone.
In this lesson you will learn some basic information about solids, liquids and gases, and how heat can change a substance from one of these phases to another. You'll watch a short video and then two animations that explain the three phases, as well as what happens to matter when energy is added or removed. After taking notes and online quizzes, you'll have a chance to review and organize what you've learned. Then you will produce your own project in which you'll define and describe what happens to particles during a change in phase.
What are the three phases of matter discussed in the video? List them in the box below. Click SAVE when you have finished. To see your saved or submitted work again, click MY WORK at the top of the page.