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Mixtures And Solutions
Test Description: 5.5CD
Instructions: Answer all questions to get your test result.
1) Two teaspoons of salt are mixed with water and the particles are spread very evenly. What is this mixture called?
A
Chemical
B
Blend
C
Solution
D
Recipe
2) A student had a mixture of popsicle sticks that float and pennies that sink. What is tool used to separate this mixture without touching the materials?
A
Evaporation
B
Flotation
C
Sieve
D
Filter
3) What happens to the physical properties of garlic salt when you add it to soup?
A
the physical properties stay the same
B
the physical properties increase
C
the physical properties double
D
the physical properties change
4) A student has a mixture of marbles, rocks, gravel and salt. Which tool would help the student separate the individual substances by size?
A
evaporation
B
a sieve
C
a filter
D
a magnet
5) Graphite is a greyish-black substance used in pencils. The substance is similar in color and size to iron fillings. The physical properties of iron filings do not change when mixed with graphite. How could iron filings be separated from a mixture
A
Add oil to the mixture to separate the iron filings from the mixture
B
Use a magnet to attract the iron fillings out of the mixture
C
Add water to the mixture to separate the iron filings from the mixture
D
Use a sieve to sort the iron filings from the graphite
6) Jack fills a jar with nuts, bolts, marbles, salt, sand, pebbles and sawdust. He adds water and shakes the jar. Jack notices that all of the ingredients keep their own physical properties except-
A
salt
B
sand
C
sawdust
D
marbles
7) Salt and pepper maintain their physical properties when mixed.
A
False
B
True
8) Salt and water maintain their physical properties when mixed.
A
True
B
False
9) Vegetable oil, water, and salt are added to a jar and stirred. The ingredients that maintain their own physical properties when mixed include-
A
A, Water and salt
B
C. Vegetable oil and water
C
D. Vegetable oil, water and salt
D
B. Vegetable oil and salt
10) What is the best (easiest) way to separate sand from water?
A
b. Boil the mixture and let the water evaporate
B
a. Use a magnet to pull out the sand
C
c. Use a filter to catch the sand
D
d. Scoop the sand with a spoon
11) Which of the following is the BEST example of a mixture in which all the ingredients keep their original properties?
A
coffee grinds boiled with water
B
sugar dissolved in water
C
food coloring mixed in water
D
salt mixed with sugar
12) What tool would you use to separate sand, rocks, and iron filings?
A
filter paper and magnifying glass
B
sieve and magnifying glass
C
sieve and magnet
D
magnet and filter paper
13) Which of the following is a mixture?
A
lemonade
B
salad
C
birthday cake
D
salt water
14) 13. Sand and salt are placed in the bottom of a beaker filled with water. The beaker is heated, and the water is stirred. What will happen to the salt and sand?
A
d. The sand will evaporate, and the salt will dissolve.
B
a. The sand and salt will settle to the bottom.
C
c. The salt will dissolve, and the sand will settle.
D
b. The sand and salt will dissolve in the water.
15) What do you call a solid that dissolves in liquid?
A
Volume
B
Soluble
C
Insoluble
D
Dense
16) A student adds 10 grams of 4 different powdered solids into 4 different beakers. The student then adds 100 mL of water to each beaker, stirs the mixtures, and allows them to sit before recording observations. What question is she trying to answer?
A
Which substances dissolve in water?
B
At what temperature do the substances dissolve?
C
What causes a substance to sink when put in water?
D
How much water is needed to cause a substance to change state?
17) Some people add sugar to their hot tea. Which property of the sugar remains the same when the sugar is in the tea solution?
A
The color of the sugar
B
The taste of the sugar
C
The texture of the sugar
D
The size of the sugar crystals
18) A student made a mixture using equal amounts of salt and pepper. The salt grains were the same size as the pepper grains. What should the student do to most easily separate the pepper from the salt?
A
Put the mixture in water and filter the pepper out the water
B
Use a pair of tweezers to remove each grain of pepper
C
Use a strainer with a fine wire screen to remove the pepper
D
Run a small magnet through the mixture to attract the pepper
19) When a powdered drink mix was added to water, the liquid turned orange. A student decided the taste was too strong, so he poured out half of the liquid and added more water. Which of the following most likely occurred when more water was added?
A
The physical state changed
B
The liquid had a sweeter taste
C
The orange color became lighter
D
None of the above
*select an answer for all questions
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