Science 4.3

Shadows are formed by opaque materials​ (a)  

Violet is the longest wavelength of visible light. ​ (b)  

Light travels faster through water than through air. ​ (c)  

Reflection is a ray of light that bounces as it strikes a smooth surface.​ (d)  

The energy of the Sun radiates into space in a wavelike motion called the electromagnetic spectrum​ (e)  

• True
• False

Produced due to vibration of matter​ (a)  

Refers to highness or lowness of sound ​ (b)  

Refers to the loudness or softness of sound ​ (c)  

Unit used to measure the intensity of sound​ (d)  

Sound reflected when sound waves hit an object​ (e)  

• sound
• pitch
• intensity
• decibel
• echo

Which of the following statements is NOT true?

• Different mediums produce like sounds

• Blowing and striking of objects produce sound

• Energy can cause the molecules of matter to move back-and forth

• Sound waves travel to our ears causing our eardrums to vibrate

What is produced when energy causing vibration is greater?

• louder sound

• softer sound

• high pitch sound

• none of the above

In which place echo cannot be produced?

• cave

• busy street

• quiet forest

• empty room

Which of the following statements is NOT true?

• Different mediums produce like sounds

• Blowing and striking of objects produce sound

• Energy can cause the molecules of matter to move back-and forth

• sound waves travel to our ears causing our eardrums to vibrate

What can be determined by the pattern of sound waves being produced?

• Echo

• Intensity

• Pitch

• Quality

What is produced when energy causing vibration is greater?

• louder sound

• softer sound

• high pitch sound

• none of the above

Which of the following does not belong to the group?

• cello

• flute

• guitar

• violin

This flask is......

• Transparent

• Transluscent

• Opaque