Monday 11/27 - Conservation of Matter - Elorde Tuliao | Library

Conservation of Matter
Objective: KWBAT explain how the amount of matter stays constant in a system even when there are changes in state of matter.

1

When solid water (ice) melts and becomes liquid water - what is happening to the molecules of the water?

1

The diagram above shows ice cubes before and after they melt. Which answer is most likely to be true?

Physical and Chemical Changes
MASS is the amount of matter in an object or substance. Today, we will measure mass in grams (g).

A physical change is a change in size, shape, or state of matter that does NOT create a new substance.

A chemical change is a change that occurs to matter and a new substance is created.

1

Does this image show a physical or a chemical change?

1

Does this image show a physical or a chemical change?

Our Investigation Question:

When matter goes through physical changes, does the mass, or weight of the matter change? Are atoms in the matter created and destroyed, or do they stay the same?

Today you are going to gather evidence to create your own conclusion about this question!

EXPERIMENT #1 - Dissolving Sugar in Water

Sugar and water were put on a scale separately to find the total mass.

1

What’s the total mass (of the sugar, water, and the containers) when the sugar and water are separate?

__________ grams.

1

Predict what will happen to the mass after the sugar is dissolved in the water - will it increase, decrease or stay the same?

1

Based on the video, what’s the total mass (of the sugar, water, and the containers) after the sugar was dissolved (mixed) in the water?

__________ grams

1

Did the mass, or weight of the matter (sugar + water + containers) change?

1

Are atoms in the matter (sugar + water + containers) created (more matter) and destroyed (less matter), or do they stay the same when the sugar dissolved in water?

1

Jaivin mixes 5 pounds of white paint and 4 pounds of red paint. How much would the pink paint he makes weigh? _________________ pounds

Ice was put in a measuring cup and a scale was used to find the mass. Answer the questions using the before and after photos below.

1

What’s the mass (weight) when the ice is solid? _______ grams

1

What’s the mass (weight) when the ice has melted into liquid water? _______ grams

1

How does this experiment support our key concept about the conservation of matter (matter is not created or destroyed)?

What happened to the amount of atoms in the ice?

The amount of atoms in the ice ___________

Monday 11/27 - Conservation of Matter

Conservation of Matter

When solid water (ice) melts and becomes liquid water - what is happening to the molecules of the water?

The diagram above shows ice cubes before and after they melt. Which answer is most likely to be true?

Physical and Chemical Changes

Does this image show a physical or a chemical change?

Does this image show a physical or a chemical change?

Our Investigation Question:

What’s the total mass (of the sugar, water, and the containers) when the sugar and water are separate? __________ grams.

Predict what will happen to the mass after the sugar is dissolved in the water - will it increase, decrease or stay the same?

Based on the video, what’s the total mass (of the sugar, water, and the containers) after the sugar was dissolved (mixed) in the water? __________ grams

Did the mass, or weight of the matter (sugar + water + containers) change?

Are atoms in the matter (sugar + water + containers) created (more matter) and destroyed (less matter), or do they stay the same when the sugar dissolved in water?

Jaivin mixes 5 pounds of white paint and 4 pounds of red paint. How much would the pink paint he makes weigh? _________________ pounds

What’s the mass (weight) when the ice is solid? _______ grams

What’s the mass (weight) when the ice has melted into liquid water? _______ grams

How does this experiment support our key concept about the conservation of matter (matter is not created or destroyed)? What happened to the amount of atoms in the ice? The amount of atoms in the ice ___________

What’s the total mass (of the sugar, water, and the containers) when the sugar and water are separate?

__________ grams.

Based on the video, what’s the total mass (of the sugar, water, and the containers) after the sugar was dissolved (mixed) in the water?

__________ grams

How does this experiment support our key concept about the conservation of matter (matter is not created or destroyed)?

What happened to the amount of atoms in the ice?

The amount of atoms in the ice ___________