20151330
Descrição
Quiz por Kate Larsen, atualizado more than 1 year ago
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Criado por Kate Larsen
aproximadamente 5 anos atrás
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Questão 1
Questão
Which of these statements BEST explains why chemistry is flexible?
Responda
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It is biased
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It adds new evidence
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It cannot be reproduced
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It cannot be verified
Questão 2
Questão
Which of the following questions can be answered by science?
Responda
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What is the purpose of our existence on earth?
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Should students be allowed to bring toys to school?
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Should the driving age be reduced?
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What is the composition of air?
Questão 3
Questão
Which of the following is the unit of length in the metric system?
Responda
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Meter
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Foot
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Inch
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Mile
Questão 4
Questão
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 hr = 3600 s)
Responda
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Divide 80 by 3,600
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Multiply 80 by 3,600
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Divide 80 by 10 and multiply the results obtained by 3,600
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Multiply 80 by 10 and divide the result obtained by 3,600
Questão 5
Questão
Which of the following types of energy does an object have because of its position?
Responda
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Potential
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Kinetic
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Radiant
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Sound
Questão 6
Questão
Which of the following shows examples of things that convert light energy into electrical energy?
Responda
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Fan and wind turbine
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Light bulb and blender
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Solar panels and solar cells
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Airplane and human body
Questão 7
Questão
The atoms and molecules in a gas are in constant motion. Temperature is a measure of this motion. How are these related?
Responda
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As temperature decreases, the molecules and atoms move farther apart.
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As temperature increases, the molecules and atoms move faster
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As temperature decreases, the molecules and atoms move faster
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As temperature increases, the molecules and atoms move farther apart
Questão 8
Questão
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 Y?
Responda
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It is a solid because there is negligible attraction between particles
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It is a liquid because there is negligible attraction between particles
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It is a liquid because the particles of the substance have higher speeds
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It is a gas because the particles of the substance have the highest speeds
Questão 9
Questão
The following properties are either physical or chemical. Which one is different from the rest based on those two categories?
Responda
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Flammability
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Thermal Conductivity
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Magnetism
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Boiling Point
Questão 10
Questão
Which of the following could result from a substance that undergoes a physical change?
Responda
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It undergoes phase change
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It changes irreversibly
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Its elemental composition is altered
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Its atoms rearrange to form a new molecule
Questão 11
Questão
What type of change occurs when an iron bar rusts?
Responda
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Chemical change
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It is reversible
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It cannot be reversed
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Physical change
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Rust is the formation of a new substance
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Rust is part of the metal and not a new substance
Questão 12
Questão
What type of change occurs when a substance freezes?
Responda
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Chemical change
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Physical change
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Phase changes
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Composition changes
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Can revert back to its original form
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Cannot revert back to its original form
Questão 13
Questão
Which of the following is a property of a pure substance?
Responda
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Its components can be separated by applying physical methods
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It consists of different types of compounds
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It is made up of a single element or type of compound
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It may have substances in different states of matter
Questão 14
Questão
The gas carbon dioxide is a pure substance. Which of the following is true about carbon dioxide?
Responda
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Carbon and oxygen are chemically bonded in it.
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The portion of carbon and oxygen is different in different samples of gas.
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Carbon and oxygen retain their original identity in it.
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It can be separated into carbon and oxygen using physical methods.
Questão 15
Questão
A student compares the boiling point of substances having different intermolecular forces. Which independent variable did the student most likely use?
Responda
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Boiling points of various substances
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Type of source used to heat up the substances
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Type of container used for the substances
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The intermolecular forces of various substances
Questão 16
Questão
Which of the following is an example of using creativity while trying to explore scientific questions?
Responda
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Using accurate and precise measurements
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Thinking of various research projects
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Using trial-and-error methods
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Selecting appropriate lab equipment
Questão 17
Questão
A balance scale is used to weigh a 2.233 g sample of copper sulfate. Which of these measurements made is the most accurate?
Responda
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2.2 g
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2.1 g
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2.5 g
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2.4 g
Questão 18
Questão
Which statement explains which thermometer is more appropriate to measure the temperature of a liquid at 43.6 degrees Celsius?
Responda
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Thermometer A, because it measures temperature more accurately than Thermometer B
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Thermometer B, because it measures temperature more precisely than Thermometer A
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Thermometer A, because it measures temperature more precisely than Thermometer B
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Thermometer B, because it measures temperature more accurately than Thermometer A
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