Properties of...
What are properties?
Characteristics of an object
Name an example of a physical change
Refer to teacher
What is the best way to know a chemical reaction has occurred?
A new substance is formed
What are the three states of Matter?
Solid, liquid, and gas
Please draw the three states of matter on the board
Refer to teacher
What are the 3 properties of Matter
Volume, Mass and Shape
Is boiling an egg an example of a physical change?
No
Name 2 examples of a chemical change
Bonus if it is a chemical change you see in daily life
See teacher
What is Matter? What is Mass?
Matter is what all physical things are made up of (whatever takes up space and has mass) Mass is the weight/density of an object (the measurement of matter)
Weighing salt before and after of mixing it with water and weighing it again after the water evaporates can be used to prove what scientific principle?
Conservation of mass
What are properties of a Solid? (Name at least 3) Hint: What do the atoms look like? How do they move? Definite or indefinite mass/volume?
-the atoms are tight packed -the atoms vibrate -have a definite mass -have a definite volume
Why is dissolving sugar in water an example of a physical change?
Because the substance is altered, no new substance is created. The mixture's chemical make up is simply water + sugar
In following reaction, name the reactant and product: Mixing baking soda and vinegar
Reactant: Baking soda and vinegar
Product: Gas
What is conservational of Mass? +50 points for an example as well
A principle that states that Matter can neither be created or destroyed See teacher for examples
What is the difference between Mass and Weight?
Weight is how much gravity is pulling on an object Mass is how much matter is in an object -On the Moon, you would weigh less, but have the same amount of mass
What are properties of a Gas? (name 3) Hint: What do the atoms look like? How do they move? Definite or indefinite mass/volume/shape?
-Atoms are spread out
-Atoms move quickly and in every direction
-Indefinite Volume, shape & Mass
A water bottle weighs 16 ounces. How much would it weigh when the water is frozen? If the cap is left on, how much would it weigh once the frozen water returns to a liquid? +50 point bonus: What wold eventually happen to the weight if the cap was off?
Frozen: 16 oz Liquid:16 oz Bonus: Eventually the bottle would weigh less because the water would evaporate
Name the change (whether physical or chemical) that occurs for each of the following stages of burning a candle Hint: 1. Wax melting 2. Wick burning 3. Wax evaporating
1. Wax melting: Physical 2. Wick burning: Chemical 3. Wax burning: Physical
What are properties of a Liquid? (name 3) Hint: What do the atoms look like? How do they move? Definite or indefinite mass/volume/shape?
-Atoms are packed loosely -Atoms move slowly and pass over each other -Indefinite shape (take up the shape of their container) -Definite mass and volume
Name 4 physical changes that occur in the kitchen
Ask teacher
Name 3 (of 4) things you can look for to see if a chemical change has occurred?
Unexpected change in energy: -Heat is either gained/lossed -Give off light Unexpected change in state: -Gives off gas or changes to a liquid or solid Or... -Changes color
When observing a candy melt, and then harden, to prove that matter can not be created or destroyed, what should be measured?
The candy's weight
Fruit ripening and rotting is an example of a physical or chemical change?
Chemical