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WorksheetsMatter Unit Review
Total questions: 37
Worksheet time: 1hrs 14mins
Which of the following statements about elements and compounds is accurate?
Elements are many different types of atoms together but compounds are just one type of atom.
Elements are pure substances that cannot be broken down physically but compounds are pure substances that can be broken down physically.
Elements are not found on the periodic table but compounds are found on the periodic table.
Elements are pure substances that cannot be broken down chemically but compounds are pure substances that can be broken down chemically.
Salt and pepper
Homogeneous mixture
Heterogeneous mixture
Air
Homogeneous mixture
Heterogeneous mixture
Sand
Homogeneous mixture
Heterogeneous mixture
Saltwater
Homogeneous mixture
Heterogeneous mixture
Steel
Homogeneous mixture
Heterogeneous mixture
Gold
Element
Compound
Mixture
Salt
Element
Compound
Mixture
Carbon dioxide
Element
Compound
Mixture
Silicon
Element
Compound
Mixture
Blood
Element
Compound
Mixture
A chain link fence rusting.
Physical change
Chemical change
Bread turning moldy.
Physical change
Chemical change
Chopping wood into smaller pieces.
Physical change
Chemical change
Burning a mashmallow over a campfire.
Physical change
Chemical change
Dissolving sugar into a glass of tea.
Physical change
Chemical change
Which of the following is an example of a chemical property?
The basketball is orange.
The gasoline is flammable.
The bike is made of metal.
The slice of cheese is a solid.
Which of the following substances would float when placed into a container of water?
Carboard and Dish Soap
Glass and Dish Soap
Glass and Apple
Cardboard and Apple
Which of the following substances would sink when placed into a container of water?
Carboard and Dish Soap
Glass and Dish Soap
Glass and Apple
Cardboard and Apple
Which of the following correctly lists the substances from most dense to least dense?
Glass, Dish Soap, Cardboard, Apple
Apple, Cardboard, Dish Soap, Glass
Glass, Dish Soap, Apple, Cardboard
Apple, Dish Soap, Cardboard, Glass
How would the results change if the substances were placed into honey instead of water? Honey has a density of 1.45 g/mL.
Cardboard would float in water, but sink in honey.
Glass would sink in water, but float in honey.
An apple would float in water, but would sink in honey.
Dish soap would sink in water, but would float in honey.
What method would you use to find the volume of an object with a regular shape?
Measure the volume of the object by placing it in water then subtract the initial volume from the final volume.
Multiply the length, width, and height of the object.
Use a triple beam balance or electric scale.
Multiply the mass and the volume.
What method would you use to find the volume of an object with an irregular shape?
Measure the volume of the object by placing it in water then subtract the initial volume from the final volume.
Multiply the length, width, and height of the object.
Use a triple beam balance or electric scale.
Multiply the mass and the volume.
What is the main difference between a physical change and a chemical change?
Physical changes alter the composition whereas chemical changes alter the appearance of a substance.
Physical changes describe the appearance of a substance whereas chemical changes describe qualities only observed in a reaction.
Physical changes describe qualities only observed with a reaction whereas chemical changes describe the appearance of a substance.
Physical changes alter the appearance whereas chemical changes alter the composition of a substance.
Rita adds 10 g of baking soda to 100 g of vinegar. The mixture begins to bubble. When the bubbling stops, Rita finds the mass of the resulting mixture. She determines its mass is 105 g. Why has the mass changed?
A gas has formed and left the mixture.
Vinegar evaporated during the experiment.
Mixtures always have less mass than their parts.
Matter was destroyed when vinegar reacted with baking soda.
Strong acids would have a pH of
2
6
8
11
Weak bases would have a pH of
2
6
8
11
Raul and Bonnie are trying to classify several objects that they found during a trip to the beach. They collected a sample of seawater, a piece of driftwood, and several smooth pebbles. How are the particles that make up the driftwood similar to those of the pebbles but not to those of the seawater?
They move freely in all directions.
They vibrate but are locked in place.
They continually collide with one another.
They slide past one another.
Which of these statements best describes the elements Mn and Fe?
They are in the same group.
They are in the same family.
They are in the same period.
They are in the same group and the same period.
The atomic number of an atom tell you
the number of neutrons.
the atomic mass.
the number of protons.
the number of electrons and neutrons.
Students in Ms. Alvarez's eighth grade science class are investigating how temperature, in degrees Celsius, affects the solubility of a compound in 100 milliliters (mL) of water. Ms. Alvarez provides the students with a graph that shows the solubility of a certain compound, as shown below.
She then tells the students that she will demonstrate how many grams (g) of the compound will dissolve in 100 mL of water at 40 degrees Celsius. Based on the information in the graph, which of the following is the best prediction of how many grams of the compound will dissolve at 40 degrees Celsius.
40 g
65 g
85 g
100 g
Mr. Roberts drives his car away from his house at a constant speed. Which of the following graphs best shows the relationship between the distance traveled and the time spent driving?
Which of the following is an example of an observation?
An ice cube feels cold to the touch.
It is raining outside, so there must be a cold front moving through.
The baby is crying loudly because she is hungry.
Our teacher isn't smiling because she's mad.
Which of the following is an example of an inference?
There is a crack in the wall of a restaurant.
The girl is running because she is late for school.
The outside of the house is made of red brick.
A man driving a black truck.
Identify the parts of the following hypothesis: If we heat the water, then more sugar will dissolve into it.
Dependent variable:
The temperature of the water
The amount of sugar dissolved
Identify the parts of the following hypothesis: If we heat the water, then more sugar will dissolve into it.
Independent variable:
The temperature of the water
The amount of sugar dissolved
Melting glue in a hot glue gun.
Physical change
Chemical change
