Embedded Files
Introduction
Introduction
Watch the video for an overview of today's learning.
Accessing documents on this site
Accessing documents on this site
Where you see an icon as below, there is a document attached.
To open your worksheet in Google Docs, select the icon, then select ‘Use Template’ to create a copy for yourself.
To open your worksheet in Microsoft Word, select the icon. If you would like to download a copy, go to File > Download.
Activity 1: Unwanted sound - sound proofing, dampening and absorbing
Activity 1: Unwanted sound - sound proofing, dampening and absorbing
Inquiry question: In what ways are we able to reduce unwanted sound?
Learning intention: Our learning intention for today is to understand how sound can be dampened.
Whether you are building a house or designing a professional sound recording studio, noise can be a problem. There are different ways to reduce unwanted sounds that are commonly used in houses, residential buildings, cars and electronic devices.
Sound Dampening Explained
Download your worksheet.
Complete the before, during and after activities connected to the 'Sound Dampening' video (5:26).
Further exploration:
Further exploration:
Investigate the principles of noise cancellation in the short clip Noise cancellation.
Activity 2: Understanding fair testing – practical simulation
Activity 2: Understanding fair testing – practical simulation
Inquiry question: What are the features of a fair test in a scientific investigation?
Learning intentions: To understand the features of fair testing in scientific investigations and to practise designing an experiment testing one variable.
By engaging in scientific inquiry, we are able to develop a better understanding of our world. Using scientific experimental design concepts help ensure that we are collecting valid, reliable and accurate results.
Task 1
Task 1
Complete the Fair Test app on Scootle to explore, practise and develop your understanding of scientific experimental design in the Fair Test Lab.
Task 2
Task 2
After you have explored the Fair Test app, complete an overview of your chosen investigation in your workbook. To the right are the headings and some examples.
Investigation results: Snip or print out the results you obtained in the Fair Test Lab for your investigation. Analyse your results to determine the effect of temperature on plant growth.
Task 3 - Guiding questions
Task 3 - Guiding questions
What was the effect of temperature on:
germination time
flowering time
flowers in cluster
time for fruit ripening
height.
What temperature was the most suited to plant growth and tomato production?
What recommendation would you make to the customer?
How might you improve the design of this investigation?
Focusing on variables: In this activity you tested or changed one variable and measured its effect on plant growth. Other variables were kept the same, so that you were only measuring the effect of one variable.
Complete the variables template for the investigation you have just completed. An example for Greenhouse Tomatoes has been provided for you.
Download the worksheet.
Use the following mnemonics, cows moo softly means to change one variable, measure one variable and keep all other variables the same. I don’t care means the independent variable, dependant variable and controlled variables. The sequence of these two mnemonics gives the linkages between each item as shown in the table to the left.
Activity 3: Measuring sound intensity - practical activity
Activity 3: Measuring sound intensity - practical activity
Inquiry question: How do we measure sound intensity?
Learning intention: To explore the use of a sound sensor to measure varying sound intensity
Sound is produced when an object vibrates, creating a longitudinal or pressure wave. This pressure wave causes particles in the surrounding medium (gas, liquid or solid) to have vibrate motion. Loudness of sound is a measure of the intensity of the sound pressure level. The decibel (abbreviated dB) is the unit used to measure the relative intensity of sound.
Task 1
Use the Arduino Science Journal app to explore the sound sensor and measure sound intensity.
1. Download the Arduino Science Journal app (login with your school Google account).
2. An alternative is the Phyphox: physical phone experiments app.
A free app available on student mobile devices. This app provides access to record data using the phone sensors and record this data for students to analyse and present through their school google accounts.
An alternative app to Google Arduino Science journal, available for apple and android phones that provides access to the phone’s sensors. It displays sensor readings in simple formats and allows data to be exported for further analysis on a computer.
Task 2
Select the Sound intensity (dB) sensor and explore various sounds to measure average, minimum and maximum decibel levels. Rank the sounds measured from lowest to highest sound intensity in a table. Copy the table to the right in your workbook and fill in your observations.
Task 3 - The Decibel Scale
Task 3 - The Decibel Scale
Compare your measured sounds with the decibel scale.
This sound intensity sensor will be very useful when you design and conduct an investigation into reducing the transmission of sound energy.
Check your understanding
Check your understanding
Task 1
Task 1
Match the correct description to the terms above by dragging. Select Check when you have finished.
Task 2
Task 2
Select the correct answer. Select Check when you have finished.
Handing in your work
Handing in your work
Don't forget to hand in the work you completed today!
Your teacher will have told you to do one of the following:
Upload any digital documents you created and any photos you took of your written work to your Learning Management system (MS Teams, Google Classroom for example).
Email any digital documents you created and any photos you took of your written work to your teacher.
Make sure you keep any hand written work you did in your exercise book or folder as your teacher may need to see these when you are back in class.
Student reflection
Student reflection
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