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NATURAL SCIENCES

Grade 4

Life and way of living

Module 4

The sense of hearing

Activity: to learn more about the sense of hearing [lo 2.1]

Listen to the tape recording that your educator will play and try to distinguish the different sounds. Your hearing enables you to hear wonderful sounds, like the sound of music, even a pin that is dropped, and a cannon being fired. It will also warn you when a car hooter is sounded behind you.

Your ears are more than two flaps at the side of your head.

The rest is inside your head where it is protected by the hard skull. The outer part catches the sound waves that come on the air and directs them with the air into the ear. Inside the ear, the sound waves are converted into messages that are taken to the brain by nerves. Your clever brain then tells you what you are hearing. The brain also sorts out all the sounds that you hear.

Find out why you have two ears.

Find out what deaf people do to improve their lives. See if you are able to use finger language by using the code illustrated below.

Many animals turn their ears to determine the direction of the sounds they hear. This means that they do not have to turn their heads. If they had to turn their heads, their enemies would detect them by their movements.

Sound waves can move through water more easily than light waves, therefore dolphins rely on hearing rather that on trying to see their enemies in the deep, dark water of the sea.

Assessment

LEARNING OUTCOME 2: CONSTRUCTING SCIENCE KNOWLEDGEThe learner will know and be able to interpret and apply scientific, technological and environmental knowledge.

ASSESSMENT STANDARD 2.1: The learner is able to recall significant information.

Memorandum

Play a recording of a variety of sounds taped by yourself, or one selected from the library.

Questions & Answers

how do I set up the problem?
Harshika Reply
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Harshika
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Shirley Reply
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Abdullahi
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Abdullahi Reply
find the value of 2x=32
Felix Reply
divide by 2 on each side of the equal sign to solve for x
corri
X=16
Michael
Want to review on complex number 1.What are complex number 2.How to solve complex number problems.
Beyan
use the y -intercept and slope to sketch the graph of the equation y=6x
Only Reply
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4
Trista
x-2y+3z=-3 2x-y+z=7 -x+3y-z=6
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Need help solving this problem (2/7)^-2
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x+2y-z=7
Sidiki
what is the coefficient of -4×
Mehri Reply
-1
Shedrak
the operation * is x * y =x + y/ 1+(x × y) show if the operation is commutative if x × y is not equal to -1
Alfred Reply
An investment account was opened with an initial deposit of $9,600 and earns 7.4% interest, compounded continuously. How much will the account be worth after 15 years?
Kala Reply
lim x to infinity e^1-e^-1/log(1+x)
given eccentricity and a point find the equiation
Moses Reply
A soccer field is a rectangle 130 meters wide and 110 meters long. The coach asks players to run from one corner to the other corner diagonally across. What is that distance, to the nearest tenths place.
Kimberly Reply
Jeannette has $5 and $10 bills in her wallet. The number of fives is three more than six times the number of tens. Let t represent the number of tens. Write an expression for the number of fives.
August Reply
What is the expressiin for seven less than four times the number of nickels
Leonardo Reply
How do i figure this problem out.
how do you translate this in Algebraic Expressions
linda Reply
why surface tension is zero at critical temperature
Shanjida
I think if critical temperature denote high temperature then a liquid stats boils that time the water stats to evaporate so some moles of h2o to up and due to high temp the bonding break they have low density so it can be a reason
s.
Need to simplify the expresin. 3/7 (x+y)-1/7 (x-1)=
Crystal Reply
. After 3 months on a diet, Lisa had lost 12% of her original weight. She lost 21 pounds. What was Lisa's original weight?
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Source:  OpenStax, Natural sciences grade 4. OpenStax CNX. Sep 18, 2009 Download for free at http://cnx.org/content/col11096/1.1
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