Ess 1

The diagrams show two different types of signals being transmitted from telephones.

Draw a circle around the diagram that shows the more reliable way to encode and transmit information.

Draw a circle around the letter of each sentence that correctly describes why the chosen technology is more reliable.

• Top Diagram

• Bottom Diagram

• A&C

• B&D

Tags

NGSS.MS-PS4-3

Which statement explains why sound cannot travel across the space between two planets?

• Sound waves need oxygen to move.

• Sound waves need a medium to move.

• The distances between planets are too great.

A wave has these characteristics.

· It does not require a medium to travel.

· Wave displacement is perpendicular to the direction of travel.

Which type of wave is being described?

• sound wave

• seismic wave

• electromagnetic wave

Tags

NGSS.HS-PS4-3

Jin is watching a pelican floating on the surface of the ocean. He notices that the pelican bobs up and down with each passing wave. Later in the day, Jin notices that when the pelican moves up with the wave, it is moving higher than before. Jin also notices that when the pelican moves down with the wave, it is going lower than before. Which best explains Jin’s new observations?

• These ocean waves have more energy than those observed earlier.

• These ocean waves have a lower frequency than those observed earlier.

• These ocean waves have a smaller amplitude than those observed earlier.

Tags

NGSS.MS-PS4-1

Write the letter of each property in the correct position in the table under the appropriate behavior. Some letters may be used more than once or not at all.

Transmits Light I Reflects Light I Absorbs Light

A. opaque B. reflective C. transparent

• Transmits Light: C

• Reflects Light: A,B,C

• Absorbs Light: A

Tags

NGSS.MS-PS4-2

A student watched as a small boat tied to the dock moved on ocean waves in the morning and afternoon. He noticed the waves bobbed the boat up and down faster in the afternoon. The boat also rose up farther with each wave in the afternoon.

Write the letter of each wave characteristic in the correct position in the table.

Morning Waves Afternoon Waves

A. greater amplitude B. higher frequency C. greater wavelength

• Morning Waves: C

• Afternoon Waves: A,B

Tags

NGSS.MS-PS4-1

Keisha is investigating a wind instrument called a recorder. She knows that blowing into the mouthpiece of a recorder creates sound waves in the tube. Keisha also knows that recorders with longer tubes produce sound waves with longer wavelengths.

Order the recorders from 1 to 3 with 1 as the recorder that can produce the lowest frequency and 3 as the recorder that can produce the highest frequency.

____ B

____C

____D

• 1,3,2

• 1,2,3

• 3,2,1

Tags

NGSS.MS-PS4-1

NGSS.MS-PS4-2

Students are investigating waves using a coiled-spring toy. The diagram shows what happens when the students push on one end of the toy repeatedly.

The students notice that when they push the coiled-spring toy with more force, the coiled-spring toy compresses more. Write your answer on the lines.

Describe how the wave amplitude is different when the students use more force.

• When the students use force, the amplitude of the waves will increase.

• By adding more force, the students are increasing the energy being transported by the waves of the coiled-spring toy. An increase in the energy being transported by the waves causes an in increase in the amplitude, and compression, of the waves.

Tags

NGSS.MS-PS4-1

Students are investigating waves using a coiled-spring toy. The diagram shows what happens when the students push on one end of the toy repeatedly.

The students notice that when they push the coiled-spring toy with more force, the coiled-spring toy compresses more. Write your answer on the lines.

Explain why using more force will change the amplitude of the wave.

• When the students use force, the amplitude of the waves will increase.

• By adding more force, the students are increasing the energy being transported by the waves of the coiled-spring toy. An increase in the energy being transported by the waves causes an in increase in the amplitude, and compression, of the waves.

Tags

NGSS.MS-PS4-1

A chemist is carefully weighing several pieces of zinc. There are two scales to choose from: a triple-beam balance and an electronic digital scale. Both scales tell the mass to the nearest 0.05 g. The chemist will use the scale to measure the masses of the pieces of zinc, and input these data into his computer.

How does the digital scale decrease the chance for error during the measurement and data entry steps described?

Write the letter of each statement that shows how the digital scale decreases error in the correct position in the table. Some letters may not be used.

Measurement Data Entry

A. The scale connects directly to a computer.

B. The data are entered by hand.

C. The scale is more precise.

D. The scale has a digital display.

E. The scale does not require sliding weights.

• Measurement: D,E

• Data Entry: A