Light and Sound Worksheet for Grade 4 with Solved in Pdf Download
Light and Sound Worksheet for Grade 4: Light and Sound Worksheet for Grade 4 students with solution in Pdf download from this page. Total marks is 40 for this worksheet. Students of Standard 4 who are already cleared concept on Light and Sound can solve this paper.
Multiple choice questions (15*1=15)
1.) What is a source of light that is found in nature?
a) Torch
b) Moon
c) Television
d) Computer
Answer: b) Moon
2.) What is a man-made source of light?
a) Stars
b) Sun
c) Firefly
d) Bulb
Answer: d) Bulb
3.) How does light travel?
a) It travels in zigzag lines.
b) It travels in a straight line.
c) It travels in circles.
d) It doesn’t travel.
Answer: b) It travels in a straight line.
4.) Which of the following is not a source of light?
a) Lamp
b) Mirror
c) Sun
d) Candle
Answer: b) Mirror
5.) What causes a shadow to form?
a) Bright light
b) Transparent objects
c) Opaque objects
d) Reflective objects
Answer: c) Opaque objects
6.) What do you call a shadow that forms when an object blocks light?
a) Transparent shadow
b) Opaque shadow
c) Reflected shadow
d) None of the above
Answer: b) Opaque shadow
7.) Which of the following objects will not make a shadow?
a) Glass
b) Paper
c) Wood
d) Metal
Answer: a) Glass
8.) What is the process of producing sound called?
a) Bouncing
b) Rebounding
c) Echoing
d) Reflecting
Answer: c) Echoing
9.) What material is known to absorb sound?
a) Metal
b) Glass
c) Wood
d) Plastic
Answer: c) Wood
10.) What happens when light falls on a mirror?
a) It gets absorbed.
b) It changes color.
c) It gets reflected.
d) It disappears.
Answer: c) It gets reflected.
11.) What is the path that light follows when it bounces off a surface called?
a) Reflection
b) Absorption
c) Refraction
d) Diffraction
Answer: a) Reflection
12.) Which of the following is an example of a transparent object?
a) Brick
b) Wood
c) Glass
d) Paper
Answer: c) Glass
13.) What happens to the speed of light when it travels from air to water?
a) It increases.
b) It remains the same.
c) It decreases.
d) It stops.
Answer: c) It decreases.
14.) What is the unit used to measure the loudness of sound?
a) Watt
b) Decibel
c) Hertz
d) Newton
Answer: b) Decibel
15.) What is the primary source of all sound?
a) Sun
b) Human
c) Animals
d) Vibrating objects
Answer: d) Vibrating objects
State true/False in the following sentences (5*1=5)
1.) Light travels faster than sound.
Answer: True
2.) Shadows are formed when light is blocked by an object.
Answer: True
3.) The Sun is the primary source of light on Earth.
Answer: True
4.) Light can travel through transparent materials like glass.
Answer: True
5.) Sound is produced when objects vibrate.
Answer: True
Fill in the blanks(10*1=10)
1.) The _____ is the main source of light.
Answer: Sun
2.) Light travels in a _____ line.
Answer: straight
3.) A _____ is formed when an object blocks light.
Answer: shadow
4.) A _____ is a substance that allows light to pass through it.
Answer: transparent
5.) _____ is a natural source of light at night.
Answer: Moon
6.) The pitch of a sound depends on its _____.
Answer: frequency
7.) When an object vibrates, it produces _____.
Answer: sound
8.) The speed of sound is faster in _____.
Answer: solids
9.) A sound with a low pitch has a _____ frequency.
Answer: low
10.) Sound is a form of _____________.
Answer: Energy
Short answer questions (10*1=10)
1.) What is source of light?
Answer: An object which gives out light is called source of light.
2.) Name two human made source of light.
Answer: Two human made source of light is bulb and candle.
3.) How does light travel?
Answer: Light travels in a straight line.
4.) How shadow is formed?
Answer: Shadow is formed when an opaque object is placed in the path of light.
5.) Which organ helps us to hear?
Answer: The sensory organ ear helps us to hear.
6.) How sound is formed?
Answer: Sound is formed when something vibrates and sends vibration into our ears.
7.) Which organ vibrates when we speak?
Answer: When we speak the vocal cords vibrate and produce sound.
8.) Name one source of sound.
Answer: One source of sound is flute.
9.) What is vibration?
Answer: A rapid back and forth motion of an object is called vibration.
10.) How can we make a shadow smaller?
Answer: We can decrease the size of a shadow by moving the object closer to the light source.