Secondary 1 Topic

Exploring the diversity of matter – Thermal conductivity

This science revision note aims to help your child understand what physical properties are.

 

But before you read on, you might want to download this entire revision notes in PDF format to print it out for your child, or to read it later.

This will be delivered to your email inbox.

Learning outcomes:

  • Understand what physical properties are.

Watch this video about the thermal conductivity experiment:

Question

A picture of a kettle is shown below.

(a) Suggest a suitable material for the handle and give a reason for your choice. [1]

(b) Suggest a suitable material for the body of the kettle and give a reason for your choice. [1]

 

 STEP 1: Recall

What physical property is this question looking for?

– The physical property is this question is testing for is thermal conductivity.

 

STEP 2: Identify the function of the handle and body of the kettle

– Handle: used for lifting and holding the kettle when it’s hot, so it needs to be heat-resistant and easy to grip.

– Body of the kettle: responsible for containing and heating the water. It needs to be a good conductor of heat and should be durable.

 

STEP 3: Piecing your answer together.

Answers

(a) Rubber / Plastic. It is a good insulator of heat / poor thermal conductor and will not transfer heat from the hot kettle to the user’s hand quickly, hence allowing the user to hold onto the kettle without getting burnt.

 

(b) Steel. It is a good conductor of heat/ good thermal conductor and allow heat to pass through them easily. This allows the contents in the kettle to gain heat faster and heat up quickly, ensuring efficient boiling.

 

 

Common mistakes

 

Wrong answers: Steel is chosen as the body of the kettle because it is a good conductor of electricity…

 

Teachers’ comments: Take note that this question is testing for thermal conductivity, not electrical conductivity.

Some students think that if a material is a good conductor of electricity, it must also be a good conductor of heat, and vice versa.

This is not true. While many metals/materials are good electrical and thermal conductors (e.g., copper and silver), there are exceptions.

For example, diamond is an excellent thermal conductor (Diamond is a better conductor of heat than copper!) despite being an electrical insulator.

Moreover, the student is using the wrong science concept. The concept tested here is thermal conductivity and not electrical conductors.

You can download this revision note so your child can revise them anytime.

This will be delivered to your email inbox.

Click here for other sec 1 science revision notes (you can bookmark this page!) >>> https://scienceshifu.com/secondary-1-science-revision-notes/

science lessons for primary school students

Subscribe To Our

Pre-Recorded Science Courses

When you sign up for the Pre-Recorded Courses, your child receives the following:

– Learn the science concepts anytime, anywhere – There are lots of recorded videos and lesson notes to learn and revise the science concepts and answering techniques. Submit the assignments from ScienceShifu and our team of science specialists will mark and reply in 3 to 4 days’ time. 

– 24/7 homework helper – Simply take a picture of the question that your child is unsure of and Whatsapp our homework helpline. Our team of science specialists will reply within 1 day.

 

Click on the button below to find out more about our pre-recorded courses

Enrol your child to

the All-In-One ‘Eureka!’ Program

When you sign up for the All-In-One ‘Eureka!’ Program, your child receives the following:

  • Live Zoom Classes conducted by our passionate teachers.
  • EdaptIQ™ – a smart digital assessment book (An adaptive learning platform to customise quizzes and practices to suit your child’s strengths and weaknesses. We have thousands of exam-based MCQs for your child to practise). This is available for P3 to P6 students only.
  • 24/7 homework help – Simply take a picture of the question that your child is unsure of and Whatsapp our homework helpline. Our team of science specialists will reply within 1 day.

 

Click on the button below to find out more about our program

Join the ScienceShifu Channel to get the latest learning tips.

 

Benefits of joining ScienceShifu on Telegram:

– Be the first to receive science revision notes from us

– Receive special promotions on all our online courses. 

 

Click on the button below to join the ScienceShifu channel:

Follow the ScienceShifu Instagram Channel to learn more science concepts

 

Benefits of joining Instagram:

– Watch out for interesting posts from ScienceShifu explaining science concepts

– Short videos where I will be going through past year exam questions

 

Click on the button below to follow the ScienceShifu Instagram Channel:

Talk again soon!

Andy Ling – Founder of ScienceShifu.com

Guiding your child to be the master of science concepts

 

Download our free revision notes to help your child prepare for the crucial exams.

Be part of our mailing list to receive the latest offers and learning tips from us.

Leave a Reply

Your email address will not be published. Required fields are marked *

*