Elements
Compounds
Solutions
Dissolving
Changes
100
The number of elements in this molecule:
NaSO2
What is three?
100
The number of atoms in this molecules
NaSO2
What is four?
100
This is the liquid that does the dissolving in an aqueous solution.
What is solvent/water?
100
A student pours powdered salt into a bottle of cold water. This is how they can increase the rate of dissolution.
What is stirring or agitation?
100
A change in size, shape, or state of matter.
What is a physical change?
200
The letters that represent an element.
What is a chemical symbol?
200
The combination of letters and numbers used to represent a compound.
What is chemical formula?
200
This is the substance that is dissolved in an aqueous solution.
What is solute?
200
Susy was testing the effect of temperature on the rate of dissolution. She tested four different temperatures. Order them from fastest to slowest dissolving time. 100 degrees, 55 degree, 35 degrees, 75 degrees
What is 100 degrees, 75 degrees, 55 degrees, 35 degrees?
200
A change that results in the creation of something new.
What is a chemical change?
300
Which of these are elements
S, I2, CO2, O2, LiF
What are S, I2, and O2?
300
The difference between a compound and a mixture.
What is a compound is chemically combined and a mixture is not chemically combined?
300
The result of adding more solvent to an aqueous solution.
What is dilution?
300
These are the three ways you can increase the rate of dissolution of a solid solute in a solvent to form an aqueous solution.
What are agitation, surface area, and heat?
300
During an investigation, a student combined two clear, colorless liquids into a single solution. The students observed a temperature change from 20 degrees to 30 degrees. The students also noticed a which substance rapidly formed and settled at the bottom of the flask. This is the type of change they observed.
What is a chemical change?
400
Identify the pure elements.
What are E, F, and H?
400
Identify the pure compounds.
What are A, D, and I?
400
The result of adding more solute to the solvent in a solution.
What is concentration?
400
Paul has the flu and must take a Vitamin C packet to get better. The packet is filled with a fine powder that needs to be dissolved in water before her can drink it. List the solvent and solute.
What are Solvent- Water, Solute- Vitamin C Powder?
400
Students building a roller coaster for toy cars cut and bend different sections of pipe to shape the track. They bend one segment into a hill, twist another into a loop, and the last into a small bump. This is the type of change they experienced.
What is a physical change?
500
Identify the following elements:
He, Fe, O, Ca, Al
What are Helium, Iron, Oxygen, Calcium, and Aluminum?
500
The only way to separate the elements in a compound.
What is a chemical reaction?
500
The beaker with the highest concentration.
What is solution C?
500
A 10 g sugar cube and 10 g of powdered sugar are put in two cups with the same volume of water at the same temperature. This one will dissolve faster.
What is 10 g of powdered sugar because the surface area is higher since they are smaller pieces.
500
Tom left half an apple in his lunchbox over the weekend. On Monday, the apple was brown, squishy, and smelled.
This is evidence for a chemical change.
What is production of a gas and unexpected color change?