Lesson 8

Multiple Select

What happened to the weight of your sample?

• It stayed the same.

• It increased.

• It decreased.

Why do you think the weight stayed the same?​

Multiple Choice

What happened to the volume of your sample?

• It stayed the same.

• It increased.

• It decreased.

Why do you think the volume decreased?

Some of the properties of ice and water are the same. Some are different. Do you think ice and water are the same or different kinds of matter?

Scientists believe that all ​matter (including ice and water) are made up of very tiny particles.

• Single particles of matter are too small to see even with the most powerful of microscopes.

• ​Once enough particles clump together, we can see them with our eyes (like ice or water). This is the visible level.

• ​We are going to use a particle magnifier to see what scientists imagine they might see if we could see the individual particles of water and ice at different temperatures. This is the particle level.

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Multiple Choice

What happens to the particles when ice melts?

• The particles freeze.

• The particles begin moving faster and no longer have a pattern.

• The particles slow down and are arranged in a pattern.

Multiple Choice

What happens to water particles when water turns to ice?

• The particles slow down/ barely move. They arrange into a pattern.

• The particles speed up and are no longer in a pattern.

​Only the motion and arrangement of the particles change.

Open Ended

Exit ticket: What changes and what stays the same as ice melts? Both at the visible level and the particle level?