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Share evidence-based conclusions and an understanding of the impact on the weight/mass of a liquid or gas mixture before and after it is separated into parts.


A substance that can be separated physically


Two or more elements that are chemically combined

20 grams of water is frozen into ice. What is the mass of the ice?

20 grams

Ms. Snodgrass wants to make tea for herself. She puts a tea kettle on the stove to boil 500 grams of water. She walks out of the room and comes back 15 minutes later but all the water has evaporated! What is the mass of the water vapor that just evaporated?

500 grams

Jordan wants to know if the mass of his hot cheetos will change at high temperatures. He finds that his hot cheetos have a mass of 300 grams. When he melts his hot cheetos into liquid, will the mass increase, decrease, or stay the same?

The mass will stay the same.

Jordan heats up his hot cheetos so much that they turn into gas. Will the mass increase, decrease, or stay the same?

The mass will stay the same.

Why will Jordan's hot cheetos stay the same mass even when the temperature increases?

The particles stayed the same when the temperature increased. They just had more energy so they moved around faster.

Kacey mixes 25 grams of flower petals with 40 grams of dirt. What is the mass of her mixture?

65 grams.

Jeff mixes 50 miligrams of orange juice, 2 miligrams of blue food coloring, and 100 miligrams of raisins. What is the mass of his mixture?

152 miligrams

Ms. Jablonsky adds baking soda to vinegar in a closed container with a balloon on top. When they mix, a chemical reaction takes place and the balloon inflates. Why did the mass stay the same even though the volume increased?

The mass stayed the same because no particles left the container. The particles in the new gas had more energy so they were more spaced out.

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