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?
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.
Does this image show a physical or a chemical change? How do you know?
Does this image show a physical or a chemical change? How do you know?
Sugar and water were put on a scale separately to find the total mass.
What’s the total mass (of the sugar, water, and the containers)?
__________ grams
Predict what will happen to the mass after the sugar is dissolved in the water - will the mass increase, decrease or stay the same?. Explain why you made that prediction.
The mass will ______ because ______
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
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.
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 atoms in the ice?
Mixing Baking Soda and Vinegar
The second scale (scale on the right) does not have a mass showing.
What would the mass (weight) be of second scale? Type a number.
Leslie places 5 pounds of ice in a 1 pound bucket with a lid. The next day, she notices all the ice has melted. When she weighs the bucket with the melted ice, what will it most likely weigh?
Explain your answer for Question 16.
Did the mass, or weight of the matter (sugar + water + containers) change?
When the sugar dissolved in water, are the 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, atoms in the matter (sugar + water + containers) _______
Explain your answer in Question 9.
Atoms were ________ because ________
