The density of a quarter is 7.8 g/mL. Will it sink or float?
It will sink.
100
What are the three basic phases of matter?
Solid, liquid, and gas
100
You mix salt into water and it dissolves. Which is the solute in the solution?
The salt.
100
Changing from a liquid to a gas.
Evaporation.
100
VOCABULARY TERM...When the molecules of a substance move closer together.
Contraction
200
What is the density of water?
1.0 g/mL
200
You place a 2 liter bottle with a balloon attached in boiling water and the balloon grows larger. Why does this happen?
Heat causes the air in the balloon to expand
200
When substance "B" is mixed with water, it is found to be insoluble. How can you tell?
You can see precipitate floating at the bottom of the test tube.
200
Changing from a gas to a liquid.
Condensation.
200
Water, oil, and corn syrup are placed in a graduated cylinder. Oil floats at the top. Water is in the middle. Corn syrup is at the bottom. Which has the greatest density?
Corn syrup.
300
What tool(s) do you use to calculate mass?
What tool(s) do you use to calculate volume?
1. a scale
2. a graduated cylinder and water
300
What is the variable that causes substances to expand?
Heat
300
At what point can you tell that a solution is saturated?
You will see the solute or precipitate floating at the bottom of the test tube.
300
A solution where the solvent is no longer able to dissolve any more solute.
Saturated solution.
300
If you didn't have water and a graduated cylinder, how could you calculate the volume of a block?
L x W x H
400
You set the water level on the graduated cylinder at 90 mL. After you dropped your cell phone into the water, the water level rose to 134 mL. What is the volume of the cell phone?
44 mL
400
When you place a thermometer in boiling water, the red liquid goes up. Why does this happen?
The heat causes the red liquid to expand.
400
If you have sugar that has a mass of 8 grams and water that has a mass of 15 grams, what will be the combined mass when the sugar is dissolved into the water?
23 grams.
400
This is defined as mass per unit volume of a substance.
Density.
400
Why does a quarter sink in water? (The answer is not "it's density is high)
It's density is greater than water.
500
The mass of an iPhone 6 is 256 grams. The volume of the phone is 44 mL. What is the density of the cell phone? USE CORRECT UNITS OF MEASUREMENT.
5.8 g/mL
500
The red liquid rises in the thermometer as the temperature increases. Is the density of the red liquid increasing or decreasing?
decreasing
500
If you have alcohol with a volume of 30 mL and water with a volume of 50 mL, what will the combined volume be when you combine them to form a solution?
Slightly less than 80. 78 or 79
500
List the units of measurement for...
Mass:
Volume:
Density:
Grams
mL
g/mL or g/cm^3
500
How does heat affect the density of a substance?
Heat causes things to expands, so it decreases the density of substances