What is matter? Provide one example of each type of matter.
All solids, liquids and gases. Examples will vary
100
What is a physical change?
When an object changes size, shape or state, but the substance does not change.
100
How do you find mass?
Use a triple beam balance (scale)
100
What is the formula for density?
mass divided by volume
100
What is a chemical change?
When one substance is turned into a whole new substance. It is irreversible.
200
What is mass?
Weight measured in grams/kilograms. Amount of matter in an object.
200
Give two examples of physical changes.
Answers will vary
200
How would you find the volume of a penny?
Drop it into a graduated cylinder filled with water, and see how much the water rises after it is dropped in.
200
Why did the liquids in our lab stack on top of one another?
The liquids were different densities, so they stacked up according to the density.
200
Give two examples of chemical changes.
Answers will vary
300
What is volume?
The amount of space inside an object.
300
What is more dense, water or vegetable oil? How do you know?
Water because it was below the vegetable oil.
300
What is one key identifier that a chemical change has taken place?
A change in color
400
What are physical properties?
Characteristics of an object that are identified by using our senses.
400
What is less dense, vegetable oil or baby oil?
baby oil because it floated on the top of all the other liquids.
400
Why did our penny lab demonstrate a chemical change?
The color of the penny changed from copper to green to pinkish. We would never be able to get the original shiny copper penny back to how it was. It is a new substance.
500
What does it mean about the densities if an object hovers in a liquid?