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WorksheetsUnits 5 and 6 Review
Total questions: 61
Worksheet time: 59mins
What are mixtures?
different materials placed together but keeping their own properties
a mixture in which substances spread out evenly and will not settle
the degree to which a material will dissolve in another substance
the substance in a solution that has the greatest amount
the substance in a solution that has the least amount
What is a solution?
different materials placed together but keeping their own properties
a mixture in which substances spread out evenly and will not settle
the degree to which a material will dissolve in another substance
the substance in a solution that has the greatest amount
the substance in a solution that has the least amount
What is solubility?
different materials placed together but keeping their own properties
a mixture in which substances spread out evenly and will not settle
the degree to which a material will dissolve in another substance
the substance in a solution that has the greatest amount
the substance in a solution that has the least amount
What is a solvent?
different materials placed together but keeping their own properties
a mixture in which substances spread out evenly and will not settle
the degree to which a material will dissolve in another substance
the substance in a solution that has the greatest amount
the substance in a solution that has the least amount
What is a solute?
different materials placed together but keeping their own properties
a mixture in which substances spread out evenly and will not settle
the degree to which a material will dissolve in another substance
the substance in a solution that has the greatest amount
the substance in a solution that has the least amount
Which process would you use to separate and analyze the solutes in a solution. During this process bands of color form on filter paper to show the different substances in the solution.
Chromatography
Magnetic Attraction
Filtration
Floatation
Sifting
Which process would you use to separate magnetic material from a mixture of other substances?
Chromatography
Magnetic Attraction
Filtration
Floatation
Sifting
Which process would you use to separate solid particles from larger particles in a mixture with filter paper in a funnel to trap solids so that the liquids will pass through.
Chromatography
Magnetic Attraction
Filtration
Floatation
Sifting
Which process would you use to separate solids that float from the remaining solids and other items that remain in a liquid mixture. The solids float to the top on their own or when stirred, and are then skimmed off the surface of the liquid.
Evaporation
Magnetic Attraction
Filtration
Floatation
Sifting
Which process would you use to separate smaller solid particles from larger solid particles. A mixture of different sized solids is put into a container that has a screen material at the bottom with certain sized holes in it. The smaller particles go through the screen and the larger ones do not.
Evaporation
Magnetic Attraction
Filtration
Floatation
Sifting
Which process would you use to separate a solid that has dissolved in a liquid solution. The solution is heated or left uncovered until the liquid turns to gas and leave the solid behind.
Evaporation
Magnetic Attraction
Filtration
Floatation
Sifting
Which answer below makes a correct statement?
Physical change only changes the color.
Physical change only changes the size.
Physical change changes the matter into something totally different.
Physical change begins and ends with the same matter.
The picture shows changes happening to water in a specially shaped bottle. What changes did the water undergo?
Melting and then Freezing
Freezing and then Evaporation
Evaporation and then Condensation
Condensation and then Melting
A teacher is demonstrating physical and chemical changes to their class. Which action should they use to demonstrate a chemical change?
Cutting a piece of paper with scissors.
Folding a piece of paper into an airplane.
Ripping a piece of paper with their hands.
Burning a piece of paper with a match.
Which student correctly recorded all the changes that took place?
Molecules in a solid move
Very fast
Fast
Very slow
What happens in a chemical change?
The atoms in the reactants rearrange themselves and bond together differently to form one or more new products with different characteristics than the reactants. When a new substance is formed.
When objects or substances undergo a change that does not change into a different substance.
What happens in a physical change?
The atoms in the reactants rearrange themselves and bond together differently to form one or more new products with different characteristics than the reactants. When a new substance is formed.
When objects or substances undergo a change that does not change into a different substance.
What happens to wood after being burned?
It may seem as though burning destroys matter, but the same amount, or mass, of matter still exists after burning wood as before.
The Law of Conservation of Mass states that matter cannot be created or destroyed, so the weight of the matter is the same. Also suppose you had been able to measure the oxygen used by the fire and the gases produced by the fire. What would you find? The total mass of matter after the fire would be the same as the total mass of matter before the fire.
When wood burns, it combines with oxygen and changes not only to ashes but also to carbon dioxide and watervapor. The gases float off into the air, leaving behind just the ashes.
All of the above.
If you mix 1 gram of salt with 50 grams of water, how many grams of matter will you have after the salt is completely dissolved?
49 grams
50 grams
51 grams
None of the above
A student mixed two substances in a test tube, he
noticed that the test tube became warm. He also
noticed an odor coming from the test tube. Based
on Jose's observations, what was
most likely occurring inside the test tube?
A. The substances were melting.
B. The substances were evaporating.
C. The substances were undergoing a chemical
reaction.
D. The substances were undergoing an
endothermic reaction.
Reggie the robot has a brown, flaky substance after being left outside in the rain. What has the rain most likely done to the robot?
A. It caused a chemical reaction that combined the
atoms in his metal body, causing it to melt.
B. It caused a chemical reaction that heated up the
atoms in his metal body, causing it to burn.
C. It caused a chemical reaction that rearranged
the atoms in his metal body, causing it to rust.
D. It caused a chemical reaction that broke apart
the atoms in his metal body, causing it to decay.
Four substances were mixed with a clear liquid. The observations are recorded in the table shown below. Based on the observations, which mixture produced the best evidence that a new substance was formed?
Substance 1
Substance 2
Substance 3
Substance 4
Students made two mixtures. Mixture 1 was made by mixing salt into water. Mixture 2 was made by mixing iron filings into sand.
Which of the following statements is true for both mixtures? Both mixtures can be separated -
by pouring them through a filter
back to their original ingredients
using the property of magnetism
out into a liquid and a solid
A student is investigating changes with common classroom materials. Which of the following BEST describes the conclusion the student can make about the investigations?
The paperclip shows evidence of a physical change by changing the shape of the object, whereas the pencil eraser and hole puncher show evidence of a physical change by changing the size of the object.
All three investigations show evidence of a physical change due to a change in the color of the original substance.
The paperclip and hole puncher shows evidence of a physical change by changing the chemical properties of the original object, whereas the pencil eraser shows evidence of a physical change by changing the size of the object.
All three investigations show evidence of a physical change due to a change in state of matter.
A teacher takes a tray of ice cubes out of the freezer. Each student takes an ice cube and holds it in their hands. They make the observations listed in the chart. The student claims that changing the temperature of the water causes a physical change that turns water into ice.
Which argument BEST supports the student’s claim?
The ice cube is melting in the student’s hand since the hands are much warmer than the ice. Heat is being added to the ice, which causes the particles to move faster.
The ice cube is freezing in the student’s hand since the hands are much warmer than the ice. Heat is being removed from the ice, which causes the particles to move slower.
The ice cube is melting in the student’s hand since state is changing from a solid to a liquid. Heat is being removed from the ice, which causes the particles to move faster.
The ice cube is melting in the student’s hand since state is changing from a liquid to a solid. Heat is being added to the ice, which causes the particles to move slower.
