20151330
Descripción
Test por Kate Larsen, actualizado hace más de 1 año
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Creado por Kate Larsen
hace alrededor de 5 años
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Pregunta 1
Pregunta
Which of these statements BEST explains why chemistry is flexible?
Respuesta
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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
Pregunta 2
Pregunta
Which of the following questions can be answered by science?
Respuesta
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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?
Pregunta 3
Pregunta
Which of the following is the unit of length in the metric system?
Respuesta
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Meter
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Foot
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Inch
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Mile
Pregunta 4
Pregunta
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)
Respuesta
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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
Pregunta 5
Pregunta
Which of the following types of energy does an object have because of its position?
Respuesta
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Potential
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Kinetic
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Radiant
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Sound
Pregunta 6
Pregunta
Which of the following shows examples of things that convert light energy into electrical energy?
Respuesta
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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
Pregunta 7
Pregunta
The atoms and molecules in a gas are in constant motion. Temperature is a measure of this motion. How are these related?
Respuesta
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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
Pregunta 8
Pregunta
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?
Respuesta
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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
Pregunta 9
Pregunta
The following properties are either physical or chemical. Which one is different from the rest based on those two categories?
Respuesta
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Flammability
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Thermal Conductivity
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Magnetism
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Boiling Point
Pregunta 10
Pregunta
Which of the following could result from a substance that undergoes a physical change?
Respuesta
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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
Pregunta 11
Pregunta
What type of change occurs when an iron bar rusts?
Respuesta
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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
Pregunta 12
Pregunta
What type of change occurs when a substance freezes?
Respuesta
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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
Pregunta 13
Pregunta
Which of the following is a property of a pure substance?
Respuesta
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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
Pregunta 14
Pregunta
The gas carbon dioxide is a pure substance. Which of the following is true about carbon dioxide?
Respuesta
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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.
Pregunta 15
Pregunta
A student compares the boiling point of substances having different intermolecular forces. Which independent variable did the student most likely use?
Respuesta
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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
Pregunta 16
Pregunta
Which of the following is an example of using creativity while trying to explore scientific questions?
Respuesta
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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
Pregunta 17
Pregunta
A balance scale is used to weigh a 2.233 g sample of copper sulfate. Which of these measurements made is the most accurate?
Respuesta
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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
Pregunta 18
Pregunta
Which statement explains which thermometer is more appropriate to measure the temperature of a liquid at 43.6 degrees Celsius?
Respuesta
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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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