Answers OK-Physical Science BLab: Magnetic and Electric Fields

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Finley is trying to transmit a sound wave that will travel continuously, but he is frustrated by the excess noise. What kind of signal is Finley sending?

analog

digital

radio

infrared

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A wheelbarrow can be used to help lift a load, such as a pile of dirt, and then push the load across a distance.

a pulley and an inclined plane

a wheel and axle and a lever

a pulley and a wheel and axle

a lever and a wedge

Which types of electromagnetic waves have frequencies that are higher than those of ultraviolet light but lower than those of gamma rays?

microwaves

X-rays

infrared light

radio waves

Which is most likely to get hot fastest when touching a warm surface?

foam cup

wooden spoon

copper wire

plastic button

Farah is doing an experiment that involves calculating the speed of a longitudinal wave. What will most likely happen if she increases the temperature in the room?

The amplitude of the wave will increase.

The amplitude of the wave will decrease.

The speed of the wave will increase.

The speed of the wave will decrease.

A circuit contains two light bulbs connected in parallel. What would happen to the brightness of each light bulb if two more light bulbs were added in parallel to the first ones?

The brightness of each bulb would decrease because the total resistance of the circuit would decrease.

The brightness of each bulb would increase because the total resistance of the circuit would increase.

The brightness of each bulb would remain the same even though the total resistance of the circuit would decrease.

The brightness of each bulb would remain the same even though the total resistance of the circuit would increase.

Which wave is carrying the most energy?

A wave with large amplitude.

A wave with very large amplitude.

A wave with small amplitude.

A wave with medium amplitude.

Which of these actions would decrease heat transfer between two objects?

increasing the temperature of the warmer object

increasing the area of their contact

reducing the thermal energy of the cooler object

reducing the time of their contact

Which term refers to the ability to do work?

energy

power

force

motion

Haley noticed a small spot on her skin that turned out to be skin cancer. Which treatment is her doctor most likely to use?

brachytherapy

superficial external beam radiation therapy

radiopharmaceuticals

high intensity focused ultrasound

Which best describes a difference between electric current and static electricity?

Electric current is continuous, and static electricity is not continuous.

Static electricity is continuous, and electric current is not continuous.

Electric current involves the movement of electrons, and static electricity involves the movement of protons.

Static electricity involves the movement of electrons, and electric current involves the movement of protons.

Which type of electromagnetic waves make up the colors of a rainbow seen after a storm?

visible light

infrared light

X-rays

ultraviolet light

Which best explains why Greg’s hands get warm as he holds a bowl of hot soup?

Heat energy is created from the thermal energy in Greg’s hands.

Heat energy is absorbed by the soup from Greg’s hands.

Thermal energy from the soup moves to Greg’s hands.

Thermal energy from the surrounding air moves to Greg’s hands.

Based on the concept of the global conveyor belt, what happens to ocean water as it moves from Antarctica to the equator?

It transfers thermal energy to deeper layers of the ocean.

It becomes less dense and rises to the surface.

It transfers thermal energy to the area, warming the equatorial waters.

It becomes more dense and sinks to the ocean bottom.

What is the potential energy of a 25 kg bicycle resting at the top of a hill 3 m high? (Formula: PE = mgh)

75 J

735 J

245 J

37.8 J

What is the kinetic energy of a toy truck with a mass of 0.75 kg and a velocity of 4 m/s? (Formula: )

3 J

6 J

12 J

24 J

Which would increase the speed of a sound wave?

A wave passes from a solid to a liquid while remaining the same temperature.

The medium increases in temperature while remaining in the same phase.

The medium decreases in temperature while remaining in the same phase.

A wave passes from a liquid to a gas while remaining the same temperature.

Which best compares radiation and conduction?

Both transfer thermal energy from warm objects to cooler objects.

Both can transfer energy through empty space.

Both transfer thermal energy by electromagnetic waves.

Both involve the transfer of energy through direct contact.

Carla draws two circuit diagrams that connect the same components in different ways, as shown.

The total resistance in Circuit A is greater than that in Circuit B.

When a bulb in Circuit A goes out, the other bulbs keep shining.

The bulbs in Circuit A shine brighter than those in Circuit B.

When a bulb in Circuit B goes out, the other bulbs go out.

Marcus plucks at an outstretched coil and observes the following wave motion. What is the motion of the particles in this kind of wave?

The particles will move up and down over large areas.

The particles will move up and down over small areas.

The particles will move side to side over small areas.

The particles will move side to side over large areas.

Nolan set up the equipment shown in order to induce a current in a wire.

The wire needs to be coiled less tightly.

The wire needs to be straight, not coiled.

The magnet needs to be moved through the coils of wire.

The magnet needs to be held above the coils of wire.

Briana builds a circuit that has a resistance of 8.0 . What voltage should she apply to have a current of 0.8 A?

0.10 V

6.4 V

7.2 V

10 V

Incisors (front teeth) act as wedges in the human body. Which change would increase the mechanical advantage of incisors?

a decrease in the distance of the teeth from the fulcrum

an increase in the distance of the teeth from the fulcrum

an increase in the thickness at the widest part of the teeth and no change in the length of the teeth

an increase in the length of the teeth and no change in the thickness at the widest part of the teeth

What happens to the sound wave in echolocation?

It releases energy

It is reflected

It is refracted

It is absorbed

Theresa comes up with four examples of waves: sound wave, ocean wave, light wave, and hand wave. Which of Theresa's examples is not an actual scientific wave?

Sound wave

Ocean wave

Light wave

Hand wave

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