1
Matter is anything that ---
takes up space and has mass.
Matter must have weight and _________.
take up space
An oreo cookie has a mass of 20 grams. It gets crushed into crumbs for a recipe. What is the mass of the crumbs?
20 grams
A mixture that has the same composition throughout because all its parts are mixed evenly.
Solution
The Law of Conservation of Matter states that the total amount of matter _____ after it undergoes change.
stays the same
If you mix 50 grams of salt with 200 grams of water, what will be the mass of the resulting solution?
250 grams
A student dissolves 10 grams of salt in 100 grams of water. What is the total mass of the solution?
110 grams
To completely mix two substances.
dissolve
A science concepts that states that matter cannot be made or destroyed, but can change into a new form.
Conservation of matter
What happens to the solubility of gases in liquids as the temperature increases?
Solubility decreases
What is desalination?
the process of removing salt from water
Which term identifies a mixture with the same composition throughout?
Solution
What is an Atom?
tiny particles in everything.
What does conserve mean?
Saved, kept the same
If a pot of water is left to boil on the stove, some of the water seems to disappear. Where does the water go?
The water changes from a liquid to a gas and escapes into the air.
Can matter vanish?
Matter can never vanish but it can change forms.
How will the physical properties of the salt change when it dissolves in the water?
The grains of salt will no longer appear as separate.
Why does the weight of the dry ice go down while it's sitting?
It is turning into a gas
If your teacher mixes 100 grams of water with 10 grams of salt, 10 grams of sugar, and 10 grams of lemonade mix what is its combined mass?
130 grams.
A student claims that when a solid dissolves in a liquid, the total volume of the solution is always equal to the sum of the volumes of the solid and liquid. Evaluate this claim.
The claim is false because the solid occupies space within the liquid, affecting the total volume.
Which of the following best explains why the mass of a solution is equal to the sum of the masses of its components?
Mass is conserved because matter cannot be created or destroyed.
How does increasing the temperature of water affect the solubility of most solid substances?
Solubility increases.
Explain why the mass of a solution remains constant even when the solution is heated and the solute dissolves faster.
The mass remains constant because the solute and solvent are still present in the solution.
A student observes that sugar dissolves faster in hot water than in cold water. What reasoning can explain this observation?
Hot water has more energy, which helps break down the sugar faster.
Describe a method to prove that the mass of a solution is conserved when a solid is dissolved in a liquid.
Measure the mass of the solid and liquid separately, then measure the mass of the solution after mixing.