Energy, Electricity, Magnetism, Waves

Which of the following models best represent what happens when sound waves are reflected?

• dropping a rock into a container of sand.

• pouring water onto a sponge that absorbs it.

• bouncing a rubber ball on the surface of a table.

• making a remote control car curve as it approaches an obstacle.

Tags

NGSS.MS-PS4-2

On Monday, Mr. Hensen's class built an electromagnet with a battery, copper wire, a switch, and an iron rod. Their electromagnet was able to move several paper clips and even a metal button. The next day, the electromagnet did not move even a single paper clip. Which of the following is NOT a possible reason the electromagnet failed?

• The orientation of the battery was reversed.

• The battery was drained of all its power.

• The wires were disconnected.

• The switch was turned off.

Tags

NGSS.MS-PS2-2

A student creates an electromagnet and holds it near two paper clips. Paper clip Y is not attracted to the magnet. Which step should the student take to attract it?

• The student should use a battery with less energy.

• The student should use a smaller core in the magnet

• The student should wrap the coil fewer times around the nail

• The student should move the magnet closer to the paper clip.

Tags

NGSS.MS-PS2-5

Markeisha needs to create an electromagnet for her science project. She needs to create a magnet that can pick up iron filings out of a mixture of substances. Which list of materials would best help Markeisha build her electromagnet?

• string, battery, metal nail

• battery, metal nail, wire

• glass rod, wire, battery

• glass rod, string, battery

Tags

NGSS.MS-ETS1-1

NGSS.MS-ETS1-2

Seamus made an electromagnet from an iron nail, a piece of copper wire with three coils spread out across the nail, and a AAA-sized battery. His magnet attracts only one paper clip, and he wants to boost the power of his magnet to attract at least four paper clips. What two things can Seamus do to accomplish his goal?

• Seamus can add batteries to decrease the voltage, and he can decrease the space between the wire coils.

• Seamus can add batteries to increase the voltage, and he can increase the space between the wire coils.

• Seamus can add batteries to increase the voltage, and he can decrease the space between the wire coils.

• Seamus can add batteries to decrease the voltage, and he can increase the space between the wire coils.

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

The model was made by a scientist to show the behavior of a light ray. Why might a scientist make this model of a light ray?

• to explain that light travels in a curved line until it passes from one material into another

• to explain that light travels in a straight line until it passes from one material into another

• to explain that light travels in a curved line even when it passes from one material into another

• to explain that light travels in a straight line even when it passes from one material into another

Tags

NGSS.MS-PS4-2

If a student rubs a glass rod with a piece of silk, giving the rod a positive charge, which of the items will the rod attract?

• Balloon 1, only

• Plastic sheet 1, only

• Balloon 1 and Plastic sheet 2

• Balloon 2 and Plastic sheet 1

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

Which characteristic is the same for every color of light in a vacuum?

• energy

• wavelength

• speed

• frequency

Tags

NGSS.HS-PS4-1

Which form of electromagnetic radiation is more energetic than ultraviolet rays?

• X-rays

• Infrared radiation

• Microwaves

• Violet light

Tags

NGSS.HS-PS4-4

A piano creates sound waves of different pitches by striking a small hammer against the strings inside the instrument. When a key is struck, the corresponding hammer strikes a string, causing a vibration that creates a sound wave. How do the sound waves of the higher pitch notes compare to the sound waves of the lower pitch notes?

• The sound waves of notes with higher pitches travel at higher speed

• The sound waves of notes with higher pitches have higher amplitudes.

• The sound waves of notes with higher pitches have higher frequencies.

• The sound waves of notes with higher pitches have higher wavelengths.

Tags

NGSS.HS-PS4-1

NGSS.HS-PS4-5