Investigation 1
Investigation 2
Investigation 3
Investigation 4
Investigation 5
100
A mixture in which a substance dissolves in a liquid.
What is a solution?
100
The natural change from liquid to gas.
What is evaporation?
100
The ratio of solute to solvent in a solution.
What is concentration?
100
The state in which the solvent cannot absorb any more solute.
What is saturation?
100
The process in which substances change to make one or more new substances.
What is chemical reaction?
200
The liquid that absorbs the substance in a solution.
What is the solvent?
200
You can discover the type of solute in a solution by examining these after evaporation.
What are crystals?
200
A solution with very little solute.
What is a dilute?
200
You open a Coke bottle and notice bubbles rising rapidly to the surface. The bubbles rise because this was released when you open the bottle.
What is pressure?
200
The methane and oxygen play this role in the reaction.
What is a reactant?
300
You mix white powder in water and then pour the mixture into a coffee filter. The powder stays in the filter, but the water passes through. The effect of the filter is due to this physical property.
What is particle size?
300
Water freezes at 0o according to this temperature scale.
What is Celsius?
300
A student takes a dropper and inserts salt water into a straw standing on end. He then draws blue-colored fresh water and drops it into the straw. The blue water sits on the surface of the salt water. This experiment demonstrates this physical property.
What is density?
300
You take salt and citric acid and stir a spoon of each separately into its own cup of water. You continue doing this until you see salt settle at the bottom of one cup; the citric acid, however, is still dissolved. This is because citric acid is higher in this physical property.
What is solubility?
300
A scholar pours fizzy water into a cup and sees bubbles rising rapidly to the surface. She knows this is not a chemical reaction due to the absence of this factor.
What is a product / new substance?
400
In this diagram, methane and oxygen are combined to form carbon dioxide and water. No mass is created or destroyed in this reaction because of this principle.
What is conservation?
400
A student stirs 4 spoons of a substance into 50 mL of water. (Each spoon is 5 g.) She leaves it in the sun until it evaporates. Using a balance, she discovers the mass of the remains.
What is 20 g?
400
You have two cups of lemon juice. The ratio of water particles to lemon juice particles in each is 6:1. You boil one cup of lemon juice and some water evaporates. The new solution's concentration is three times higher than the first. Name the new ratio of water to lemon juice.
What is 2:1?
400
You want to know how much epson salt can dissolve in 50 mL of water. You mix the salt into the water until you see salt settle at the bottom of the cup. You will need this tool next to determine the mass of your solution.
What is a filter?
400
You mix a red-colored substance in water. When the solid dissolves, the solution is light red. Fifteen minutes later, a white substance settles at the bottom of the cup. Name the best evidence a chemical reaction occurred?
What is the white substance?