Properties
Changes
Elements and Compounds
Mixtures
Labs/Activities
100
Blue color is an example of
What is a physical property?
100
An apple is left out and rots. What 2 indicators would tell us that a chemical change occurred?
-Change in color
-Smell
100
Carbon dioxide is an example of?
What is a compound?
100
Provide one example of a mixture.
Answers will vary.
100
When iodine mixed with baby powder, this type of change occured.
Chemical change (change in color)
200
Boiling point, melting point and density are some of an element’s
Physical properties
200
A student puts three drops of green food coloring into salt water. What type of change occurred?
What is a physical change?
200
The following picture shows an example of what? 
What is an molecule?
200
How many different substances are in this mixture? 
What is 2?
200
Describe 2 types of changes that occurred during the smores lab.
Chemical: burning marshmallow, digestion
Physical: melting chocolate, breaking graham cracker, chewing
300
Acidity and flammability are examples of?
What is chemical properties?
300
An ice cube is placed in the sun. Later, there is a puddle of water. Later still the puddle is gone. What physical changes are occurring?
What are melting and evaporation? (State changes)
300
An element is a pure substance in which there are how many different kinds of atoms?
What is one?
300
Why is air considered a mixture?
Air is made up of several different compounds and molecules such as CO2, H2O, N2, and O2.
300
Draw the following substance:
2NH3
400
A student is performing an experiment with baby powder. The student notes that the powder is soft, white, and smells good. In this example, smell is a...
Physical property
400
We know when a chemical change has occurred when we answer yes to this important question.
Has a new substance been formed?
400
This is what is formed when two or more elements are joined together chemically.
What is a compound?
400
Salt and water are considered this.
Salt water is this.
Salt and water: compounds
Salt water: mixture
400
Describe the type o substances you see in the picture. Explain your answer. 
CO2 is a compound. It is made of two different types of atoms.
O2 is a molecule. It is made of the same type of atom.
500
Sal is given a sample of an unknown liquid to test in the laboratory. Sal thinks the liquid might be water. Which physical properties would be helpful for Sal to determine the identity of the liquid?
Acceptable answers:
1. Boiling point
2. Melting point
3. Density
500
A new substance is formed during a chemical change. What remains the SAME between the original and new substance?
The original and new substance should have the same mass/matter/number of molecules. The amount of matter has not changed, it was just rearranged to form the new substance.
500
What compound is the following?
CCCCCCHHHHHHHHHHHHOOOOOO
What is C6H12O6?
500
Based on your mixtures lab, how do mixtures differ from compounds? Make a claim and support with evidence from the lab.
The parts of a compounds are always in a specific ratio, while a mixture's is not. In our lab, every group had a different amount of each colored bean but it was still a mixture. However, every group had the same ratio of elements in the compounds they built.
500
Answer the question using evidence from the formula...is matter being created? 
No matter is not created! The same amount of matter on one side of the equation is on the other. Ex: There are 4 total hydrogen atoms on the left (H4) and 4 on the right (2H2)