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WorksheetsModule 1: Matter
Total questions: 45
Worksheet time: 46mins
Which of these statements best explains why chemistry is flexible?
It is biased.
It cannot be verified.
It adds new evidence.
It cannot be reproduced.
Which of the following is the unit of length in the metric system?
Foot
Inch
Meter
Mile
Which of the following questions can be answered by science?
What is the composition of air?
Should the driving age be reduced?
What is the purpose of our existence on Earth?
Should students be allowed to bring toys to school?
A car travels at a speed of 80 km/h. Which of the following is correct to convert the speed of the car to hm/s? [1 km = 10 hm, 1 h = 3600 s]
Divide 80 by 3,600
Multiply 80 by 3,600
Divide 80 by 10 and multiply the result obtained by 3,600
Multiply 80 by 10 and divide the result obtained by 3,600
Which of the following types of energy does an object have because of its position?
Kinetic energy
Potential energy
Radiant energy
Sound energy
Which of the following shows examples of things that convert chemical energy to mechanical energy?
Toaster and fan
Fan and microwave oven
Airplane and human body
Microwave oven and blender
The atoms and molecules in a gas are in constant motion. Temperature is a measure of this motion. How are these related?
As temperature increases, the molecules and atoms move faster.
As temperature decreases, the molecules and atoms move farther apart.
As temperature increases, the atoms and molecules move closer together.
As temperature decreases, the molecules and atoms move faster.
The table compares the characteristics of a substance in three different states of matter.
Which of these best describes the state of the substance represented by State X?
It is a solid because particle attraction is weak causing the least particle movement.
It is a liquid because particle attraction is weak allowing some particle movement.
It is a gas because the particles of the substance are unable to move.
It is a liquid because the particles of the substance are unable to move.
The following properties are either physical or chemical. Which one is different from the rest based on those two categories?
Density
Flammability
Heat of combustion (the amount of heat needed to explode)
Reactivity
Which of the following could result from a substance that undergoes a physical change?
Its chemical composition is altered.
It has an irreversible change.
It forms a new substance.
Its shape is altered.
Compare the type of change that occurs when a substance melts and when a substance is set on fire. Use complete sentences to justify the type of change that occurs.
Which of the following is a property of a mixture?
It consists of a single element or compound.
Components that are mixed can be in different states of matter.
It is very difficult to separate the components.
The proportion of the particles that make it up cannot be altered.
The gas carbon dioxide is a pure substance. Which of the following is true about carbon dioxide?
Carbon and oxygen are chemically bonded in it.
Carbon and oxygen retain their original identity in it.
It can be separated into carbon and oxygen using physical methods.
The proportion of carbon and oxygen is different in different samples of the gas.
A student compares the boiling point of substances having different intermolecular forces. Which scientific problem is the student most likely investigating?
Is boiling point affected by the strength of particle attraction?
Is boiling point correlated to melting point?
Is boiling point affected by the mass of the sample?
Is boiling point the temperature at which a substance changes its state?
A chemist is designing an experiment to investigate the effect of temperature on the rate of a chemical change. Suggest a suitable hypothesis for the experiment. Also, list the dependent, independent, and controlled variables that can exist in such an investigation.
Which of the following is an example of using creativity while trying to explore scientific questions?
Thinking of various research topics
Using trial-and-error methods
Using accurate and precise measurements
Selecting appropriate laboratory equipment
Ted used a balance scale to weigh a 2.233 g sample of copper sulfate. Which of these measurements made by Ted is the most accurate?
2.1 g
2.2 g
2.4 g
2.5 g
Look at the two thermometers.
Which statement explains which thermometer is more appropriate to measure the temperature of a liquid at 43.6 °C?
Thermometer A, because it measures temperature more accurately than B.
Thermometer B, because it measures temperature more accurately than A.
Thermometer A, because it measures temperature more precisely than B.
Thermometer B, because it measures temperature more precisely than A.
Compare the type of change that occurs when an iron bar rusts and when a substance freezes. Use complete sentences to justify the type of change that occurs.
Compare the type of change that occurs when a match is burnt and when a liquid starts boiling. Use complete sentences to justify the type of change that occurs
A science student observes that a dissolvable antacid tablet acts faster in relieving stomach pain when taken with warm water than when taken with water at room temperature. Based on the observation, suggest a potential problem that can be studied. Also, list the dependent, independent, and controlled variables that can exist in such an investigation.
A glow stick contains a glass vial with chemicals. When the glow stick is bent, the vial breaks and the chemicals react to produce a glow. A science student observes that a glow stick kept in the freezer glows for a longer duration than a glow stick kept at room temperature. What conclusion can be drawn based on the observation? Be sure to note the outcome and test variables in the conclusion.
Jeff used an equal arm balance to weigh a 4.312 g sample of sodium chloride. Which of these measurements made by Jeff is the most accurate?
4.1 g
4.2 g
4.3 g
4.5 g
Emma used an equal arm balance to weigh a 1.134 g sample of calcium carbonate. Which of these measurements made by Emma is the most accurate?
1.1 g
1.2 g
1.3 g
1.4 g
Which of the following is an example of using creativity while recording measurements during an experiment?
Writing a hypothesis
Organizing data in tables
Validating results by repetition
Interpreting results based on data
Which of the following is an example of using creativity while doing background research?
Organizing data in tables
Validating results by repetition
Drawing a conclusion
Writing a hypothesis
A student compares the boiling point of substances having different intermolecular forces. Which dependent variable did the student most likely use?
Compounds made of either ions, atoms, or molecules
Type of source used to heat up the substances
Type of container used for the substances
Boiling points of various substances
A student compares the boiling point of substances having different intermolecular forces. Which independent variable did the student most likely use?
The intermolecular forces of various substances
Type of source used to heat up the substances
Type of container used for the substances
Boiling points of various substances
A hair gel is a mixture. Which of the following is true about hair gel?
A chemical separation is required to separate its mixed components.
A physical separation is enough to separate its mixed components.
It is made up of millions of units of a single type of compound.
It is made up of millions of atoms of a single element.
Water is a pure substance. Which of the following is true about water?
Its compounds can only be chemically separated into the elements that make it up.
Its compounds can only be physically separated into the elements that make it up.
It is made up of a variety of compounds, each with a different set of properties.
It is made up of one element and one compound, each with the same properties.
Which of the following is a property of a pure substance?
It consists of different types of compounds.
It may have substances in different states of matter.
It is made up of a single element or type of compound.
Its components can be separated by employing physical methods.
Which of the following is a property of a pure substance?
It can be chemically separated if it is a compound.
Its components can be separated with ease.
It is made up of two or more types of compounds.
The original components retain their individual properties.
The original components retain their individual properties.
Its elemental composition is altered.
It undergoes phase change.
It has a reversible change.
Its shape is altered.
Which of the following could result from a substance that undergoes a physical change?
It changes irreversibly.
It undergoes phase change.
Its elemental composition is altered.
Its atoms rearrange to form a new molecule.
The following properties are either physical or chemical. Which one is different from the rest based on those two categories?
Boiling point
Density
Ductility
Heat of combustion
The following properties are either physical or chemical. Which one is different from the rest based on those two categories?
Boiling point
Flammability
Magnetism
Thermal conductivity
Temperature is used to measure the movement of particles such as atoms and molecules. As temperature increases, what is always true of the particles in a substance?
The rate of movement increases.
The distance between them decreases.
The attraction between them increases.
The rate of reaction decreases.
The atoms and molecules in a liquid are in constant motion. As temperature decreases, what is true of the particles in the liquid?
The distance between the particles increases.
The attraction between the particles decreases.
The rate of particle movement decreases.
The potential energy of the particles decreases.
Which of the following shows examples of things that convert electrical energy to thermal energy?
Fan and wind turbine
Toaster and room heater
Airplane and human body
Natural gas stove and blender
Which of the following shows examples of things that convert light energy to electrical energy?
Fan and wind turbine
Light bulb and blender
Airplane and human body
Solar panels and solar cells
Which of the following types of energy does an object have because of its motion?
Chemical energy
Gravitational energy
Kinetic energy
Potential energy
Which of the following types of energy does an object store in the bonds of atoms and molecules?
Chemical energy
Gravitational energy
Kinetic energy
Sound energy
A leaky faucet can waste 3,000 gallons of water per year. Which of the following is correct to convert the water wasted to liters/month? [1 gallon = 3.8 liters]
Divide 3,000 by 3.8
Multiply 3,000 by 12
Multiply 3,000 by 3.8 and divide the result obtained by 12
Divide 3,000 by 3.8 and multiply the result obtained by 12
The density of a gas is 1.25 grams/liter. Which of the following is correct to convert the density of the gas to ounce/milliliter? [1 gram = 0.04 ounce, 1 liter = 1,000 milliliter]
Multiply 1.25 by 0.04 and divide the result obtained by 1,000
Divide 1.25 by 0.04 and multiply the result obtained by 1,000
Divide 1.25 by the product of 0.04 and 1,000
Multiply the numbers 1.25, 0.04, and 1,000
Which of the following questions can be answered by science?
s fruit ripening dependent on the type of light the fruit is exposed to?
Is it justifiable to add chemicals to the atmosphere to stimulate rain?
Do art and beauty provide a soul-stirring experience to humans?
Do scientists have the right to edit human DNA?
