Q2 Benchmark Review 2021

Which statement is true about the electromagnet?

• A magnetic field is created around the electromagnet when the nail is placed next to the battery.

• A magnetic field is created around the electromagnet after the battery is removed from the wire.

• A magnetic field is created around the electromagnet when an electric current flows through the wire

• A magnetic field is created around the electromagnet after the pins come into contact with the nail.

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How can the student increase the strength of the electromagnet?

• by increasing the voltage of the battery

• by decreasing the number of loops in the coil of wire around the nail

• by switching the connection points of the wire on the battery

• by moving the pins closer to the nail

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Which conclusion is supported by the results?

• The magnetic field is blocked by the piece of wood.

• The magnetic field is reversed by the piece of wood.

• The magnetic field passes through the piece of wood.

• The magnetic field increases through the piece of wood.

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What do the magnet and copper coil in this flashlight represent?

• generator

• motor

• resistor

• transformer

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A force causes the block-spring system to vibrate up and down for a few seconds before it comes to rest. When at rest, which statement correctly explains if the forces are balanced or unbalanced?

• The forces are balanced because the block and spring are in a steady position and not moving.

• The forces are balanced because only balanced forces can create up and down vibrations in a spring.

• The forces are unbalanced because gravity is continually pulling down on the block, even at rest.

• The forces are unbalanced because the spring is initially compressed, even though it is currently at rest.

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How many blocks will experience a change in motion?

• 0

• 1

• 2

• 3

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Which explanation best describes the pattern in the data?

• Planets formed from increasingly dense particles as distance from the Sun increased.

• Planets were captured randomly from a nebula with particles of low density by the Sun’s gravity.

• Gravity from the Sun caused bands of particles with the same density to collect into planets during the formation of the solar system.

• Gravity from the Sun pulled the most dense particles close to the center of the solar system during the formation of the planets.

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Which best explains what the student observes?

• Both the slime and magnet exert a repulsive force on each other even though they do not initially touch.

• Both the slime and magnet exert an attractive force on each other even though they do not initially touch.

• The magnet touches the slime, which causes the slime to be attracted to the magnet.

• The magnet touches the slime, which causes the slime to be repelled from the magnet.

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How is digitized information transmitted?

• through a series of wave pulses

• through a series of sound beats

• as an unbroken stream of information

• as a mechanical wave

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During which two parts of the graph is the lizard not moving?

• part A

• part B

• part C

• part D

• part E