Vocabulary
Two or more materials put together is called a...
Mixture
Knowing the particle size of the materials in a mixture helps you know...
a) how much the mixture will weigh
b) what the crystals will look like after evaporation
c) which tools to use to separate them
C) which tools to use to separate them
What is the process of a solute (solid) spreading out evenly (disappearing) into a solvent (liquid)?
dissolving/dissolve
1 gram is the same as....
1 mL
What does a salt crystal look like?
a square with an X inside
A special mixture that is formed when a solid dissolves in a liquid is called a ...
Solution
Give an example of a mixture.
salad, trail mix, cereal and milk, nuts/m&m's, gravel and salt etc. (answers will vary)
Mac and cheese is a type of solution.
False- it does not have a solute that dissolves into a solvent.
dissolved
What is ONE difference between a screen filter and a paper filter?
screen filter has larger holes, paper filter has small holes that allow more things to pass through
___________ is the the liquid part of a solution.
Solvent
Gianna used a paper filter to separate a mixture of sand, salt, and water. Why did the salt go through the filter paper, but the sand did NOT?
The salt was dissolved in the water and it's particle size was smaller than the holes of the paper filter. The sand particle size was larger than the tiny holes of the paper filter and therefore did not fit through.
Give an example of a solution.
Lemonade, salt water, iced tea, kool-aide (fruit punch), sugar water, soda, etc.
Property
What is ONE way the properties of gravel, powder, and salt are different?
They are different particle sizes and therefore need to be separated using different methods/tools.
Gravel is more dense and larger-screen
Powder- paper filter
Salt- evaporation
Answers may vary.
___________ is the solid part of a solution.
Solute
What could you use to separate a mixture of gravel and beads?
a) floating (add water) and then filter through a screen
b) hands (pick out the beads and gravel)
c) evaporation
b) hands ...
because both the beads and gravel would stay on top of the screen. Evaporation would not separate them since neither dissolves.
How do you know when a solid and water form a solution?
when the solid seems to have disappeared, or dissolved, into the water
True or false.
Lucas said that if he puts 40 grams of salt in a beaker of 100mL, the water will weight more than it did without the salt. Is this true?
True- salt water weighs more than plain water because of the salt being dissolved in the water.
A student makes a mixture of salt, powder, and gravel. What is the correct order of the steps for separation of each material?
A) evaporate the water
B) pour the mixture through filter paper
C) add water to the mixture
D) pour the mixture through a screen
A natural form of a substance. The shape and pattern of this helps you identify what it is.
Crystal
True or False.
Which of the following mixtures can be separated using a paper filter?
a) a solution of salt and water
b) a solution of sugar and water
c) a mixture of gravel and water
d) a mixture of gravel and popcorn kernels
c) a mixture of gravel and water
A solid dissolved in water (solution) can be separated by using...
evaporation
Miss Wittman is getting married on which date?
a) October 31, 2023
b) July 4, 2023
c) November 11, 2023
d) June 9, 2023
d) June 9, 2023
A student dissolves 20 grams of salt in 100 mL of water. Then they boil it to speed up the evaporation process. When the water evaporates completely, how much SALT will be left?
20 grams