WorksheetsPreparation for the Midterm Assessment - Science Grade IV
Total questions: 20
Worksheet time: 23mins
What causes sound to travel through the air?
Light
Vibration
Heat
Pressure
How do two friends use a string and cups to communicate? What is the reason behind it?
Because the cups are made of papers which conducts sound better
Because the string vibrates and carries the sound from one cup to another
Because the cups amplify the sound making it easier to hear
Because the cups are large and can hold more sound
While swimming, Randu noticed that he could hear his friend calling him from the shore. How is this possible?
His friend is using a loudspeaker to amplify the sound.
Randu has special hearing abilities that allow him to hear underwater.
Sound waves can travel through both water and air, reaching Randu's ears.
Randu's friend is very close to the water, making it easier for Randu to hear.
This part of the ear is responsible for collecting sound waves and directing them into the ear canal.
It is referred to as the...
ear drum
ear canal
pinna
tympanic membrane
Which of the following is an example of a luminous object?
a moon
a mirror
the Earth
an LED lamp
The sound could be louder when traveling through the solid.
True
False
Using sharp objects to clean our ears can be dangerous.
True
False
The pitch of a sound is determined by its frequency.
True
False
A plane mirror provides a clear image of an object.
True
False
Not all materials can transmit light.
True
False
The structure in the ear that helps in transmitting sound vibrations to the inner ear is ...
(a)
The effect produced when sound waves reflect off a barrier and return to the listener is referred to as an ...
(a)
The time taken to complete one oscillation is called...
(a)
Sounds with frequencies more than 20.000 Hz are called ...
(a)
The longest bar of the xylophone produces... pitch.
(a)
The girl is playing a guitar. She strums the strings in different ways.
What can she do to increase the pitch of the guitar?
How can loud noises impact your health?
Identify 3 sources of natural light and 3 sources of artificial light.
Mention four ways to take care of your ears.
Mention three examples of non-luminous objects.
