Ed learned that sound travels faster in liquids and solids than in gases. He researched and recorded this information in his notebook.

The explanation is that sound travels faster through substances made of tightly packed particles.

Which statement gives a logical analysis Ed could make about the explanation, based on the empirical evidence he recorded?

• The speed of sound gets slower from gases, to liquids, to solids.

• The speed of sound gets faster from gases, to liquids, to solids.

• The speed of sound stays the same

• The analysis would be different with different gases, liquids, and solids

Tags

NGSS.MS-PS4-1

NGSS.MS-PS4-2

Jake is doing observational testing to learn about sound volume and pitch. From which object will he hear a low volume and a low pitch?

• refrigerator

• musical triangle

• smoke detector

• fire engine siren

Which statement best explains the experimental testing the scientist is doing in the illustration below as he puts each item inside the closed box?

• measuring wave lengths of various sounds

• testing the best way to amplify sounds

• testing the loudest noise each object can produce

• testing how the box’s lining transmits or absorbs sounds

Tags

NGSS.MS-PS4-2

What property of sound energy is essential for scientists to make images of an object?

• compression

• loudness

• reflection

• wavelength

Tags

NGSS.MS-PS4-2

Max has been exploring the uses of sound energy. He has discovered that scientists use sound-energy technology to make images of underwater objects. What is this technology called?

• ultrasound

• sonar

• sound insulation

• amplification

Tags

NGSS.MS-PS4-2

For an experiment on sound, Amir makes a drum by stretching a rubber balloon over a cylinder. Which safety equipment should Amir use?

• rubber gloves

• lab coat

• safety goggles

• headphones

Jen phoned home but got no answer. She knew her mother was home. She inferred that her mother did not hear the phone. What reasonable explanation could she construct from this indirect evidence?

• Her mother was in a room with no phone and the door was closed.

• Her mother was in a room with no phone and the door was open.

• Her mother was in a room with a phone and the door was

  closed.

• Her mother was in a room with a phone and the door was open.

Ultrasound is d medical technology that produces images of the inside of the human body. What is the best description of the energy that causes the images?

• electrical energy in the body that travels out

• sound energy in the body that travels out

• electrical energy that starts outside the body, travels inside and then bounces back out

• sound energy that starts outside the body, travels inside, and then bounces back out

Tags

NGSS.MS-PS4-2

Al had students listen to a sound through cubes of different material. He asked which let them hear most clearly. The table below shows his results.

What reasonable explanation can Al construct by interpreting this information?

• Sound travels more clearly through plastic than glass

• Sound travels more clearly through glass than plastic.

• Of the three materials, sound travels most clearly through wood.

• Of the three materials, sound travels most clearly through plastic.

Tags

NGSS.MS-PS4-2

Scientists tested students’ hearing twice a year. Students who often listened to music through ear buds were more likely to have hearing loss. What explanation could scientists construct from this direct evidence?

• Listening to music on ear buds causes hearing loss.

• Listening to music on ear buds makes hearing loss more likely.

• Listening to music without ear buds is safe.

• Listening to music without ear buds is riskier.