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You make hot chocolate by adding 100g of cocoa powder and 500g of milk into a pan. After heating the pan, you measure 600g of hot chocolate in the pan. This proves that the materials...
have the same total mass before and after the change.
You make hot chocolate by adding 100g of cocoa powder and 500g of milk into a pan. After heating the pan, you measure 600g of hot chocolate in the pan. The appearance ____ but total amount of matter ______.
changed, stayed the same
You make hot chocolate by adding 100g of cocoa powder and 500g of milk into a pan. After heating the pan, you measure 600g of hot chocolate in the pan. The new measurement shows that when the two substances were mixed, the total weight ____
was conserved
There is a cup of 8kg of ice. After a few hours, there is 5kg of ice and 3kg of water in the cup. After the change in matter, the mass of the ice was ______.
5kg
There is a cup of 8kg of ice. After a few hours, there is 5kg of ice and 3kg of water in the cup. Before the change in matter, the mass of the ice was ______.
8kg
gas to solid is called...
freezing! or deposition...
liquid to gas is called...
vaporizing, or evaporation
Solid to liquid is called...
melting
food coloring dissolving in water is an example of...
solution
oil and water is an example of...
mixture
a fire burning is an example of...
chemical change
Crushing a can is an example of...
physical change
Beaker B has baking soda and lemon juice added to it. Beaker B forms bubbles. What kind of change, if any, is taking place?
Chemical Change
Beaker A has water and lemon juice added to it and then is placed into the freezer. Beaker A shows no change. What kind of change, if any, has taken place?
Physical Change
What are two physical changes? A. paper burning. B. ice melting. C. firecracker exploding. D. a fence rusting. E. bread being sliced.
B. ice melting and E. bread being sliced
What steps would help students dissolve sugar more quickly?
break it into smaller pieces, and heat and stir the solution
What would decrease the rate of a solute dissolving (dissolve slower)?
larger solute sizes, decreased temperatures
What would make a solute dissolve faster?
smaller solute sizes, temperature increase
Why would you add more salt to a salt water solution to increase the concentration?
Salt is a solute; this would provide the highest salt to water ratio.
How could you make this solution with the highest possible concentration? 5g of salt + 5mL of water + ____________
MORE SALT!
How do you make a solution MORE concentrated?
Add more solute!
Goldfish crackers, M&Ms, popcorn, and pretzels combined in a bowl represents a __________.
mixture
You have are making a boat with a base area of 20 square cm that must carry as many pennies as possible. What tools would you need to help make your boat design, flotation, and loading of your boat?
Ruler to measure the base, graduated cylinder to measure volume, and balance to measure mass.
Oil floats on water because oil is __________ than water.
less dense
Janajah examined different minerals. She noticed that the minerals have different colors and lusters. She determines the red mineral can scratch the colorless mineral. She concludes the red mineral is _________ than the colorless mineral.
harder
A solid (maintains/does not retain) its shape.
maintains
A solid (maintains/does not retain) its volume.
maintains
A solid (maintains/does not retain) its mass.
maintains
Solid, liquid, or gas? Has definite shape.
Solid
Solid, liquid, or gas? Volume cannot be measured easily.
Gas
Solid, liquid, or gas? Volume can be measured by a graduated cylinder.
Liquid
Solid, liquid, or gas? Expands to fill its container.
Gas
Solid, liquid, or gas? Volume can be measured by a ruler.
Solid
Solid, liquid or gas? Takes the shape of its container.
Liquid
When one carbon atom bonds chemically with two oxygen atoms, carbon dioxide is formed. This new substance is BEST defined as a ________________.
compound
What elements make up hydrogen peroxide, and how many atoms of each element are there?
Hydrogen and Oxygen. There are 2 atoms of Hydrogen and 2 atoms of Oxygen.
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