Properties
__________ is the property that measures the size of an object.
We can find it with metric measurement or water displacement.
Volume
Characteristic properties are_________________________________________________________________________
Properties that tell you what a substance is made of.
A banana is rotting on the counter. Is this chemical or physical change?
Chemical Change
__________ are the substances that combine in a chemical reaction.
Reactants
Is volume a characteristic property?
Bonus: Explain how you know
No.
Any object can have any volume. A tree and a pencil are both wood, even though they are very different sizes.
_______ is the amount of matter inside an object.
Bonus: what unit is it measured in?
Mass
Bonus: Grams
Do characteristic properties change if the volume of a substance changes?
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An ice cube melts on the hot sidewalk. Is this chemical or physical change?
Physical Change
_________ are the substances that come out of a reaction.
Bonus: Can these be turned back into their original forms?
Products
Bonus: No
Which of the following is a characteristic property?
Volume, Hardness, Mass, Color, Shape.
Hardness
Relative Density is a measure of whether an object _________ or ____________ in liquid.
Bonus: Objects with low relative density will _______ in liquid.
Sinks or Floats
Bonus: Floats
Name any three characteristic properties.
Possible answers:
density hardness freezing point
boiling point pH solubility
melting point miscibility malleability
In a ________ change, properties such as volume, mass, and shape are changed.
Bonus: Name another type of this change.
Physical
Bonus: Change in density, Change in form
Kaylee and her friends burned wood for a bonfire.
Did a chemical reaction occur? Give at least 2 reasons how you know.
Yes. Smoke (a gas) was emitted. The wood cannot be changed back to unburned wood. The wood changed color. The wood gave off a strong smell of smoke.
A Melting Snowman is an example of a __________ change
Bonus: What is the name of this change?
Physical
Bonus: Melting
_______ is a measure of whether or not a substance can be squished, moved, or stretched.
Malleability
Jean Carlos wanted to know what metal a coin is made of.
Name 1 test he could perform to identify the substance.
Bonus: Explain how he would perform this test.
Density
Bonus: Find mass using a triple beam balance then calculate volume using water displacement. Divide Mass / Volume =Density
In a _________ change, properties such as color, odor, or energy change.
Chemical
Marangelis left her bike out in the rain. Overnight, the metal of the bike began to rust. It turned brown, bumpy, and she could not make it go back.
Did a chemical reaction happen? Explain how you know.
Yes. The color changes, the material changed in its texture, and she could not change it back to a non-rusted bike.
Yandel mixed together cream, milk, and caramel, the microwaved the mixture. When he was done, he had a solid block of flan that he ate with his friends.
Did a chemical reaction occur? Was it endothermic or exothermic?
Yes.
It was Endothermic (he microwaved it)
___________ is a measure of whether a liquid will dissolve in another liquid.
_________ is a measure of whether a solid will dissolve in liquid
Miscibility
Solubility
Angel found a crystal with a hardness of 8.0, a melting point of 365°F, and it is 15cm³ in size and colored blue.
Which crystal is it given the information on the board?
Sapphire
Mr. Sheridan mixed together 2 substances. One was green with a density of 14.1g/mL, the other was blue with a density of 16.7g/mL. When the substances combined, the liquid glowed pink with a density of 15.1 g/mL.
Name 1 Physical change and 1 chemical change that occurred.
Physical: The density changed. The volume also changed.
Chemical: the color changed. The chemical began to give off light.
What is the difference between endothermic reactions and exothermic reactions?
Endothermic reactions require heat in order to happen (Reactants + Heat = Products).
Exothermic Reactions produce heat (Reactants = Heat + Products).
Which Comic Book Company is objectively better than the other?
DC or Marvel?
Bonus: Who is Mr. Sheridan's favorite Superhero?
DC Comics!!!!
Wonder Woman!