Teaching ScienceHelp for trainee Science teachers

A few photos from the day.

Here are some useful sites to supplement the work we did on Electricity yesterday.

Firstly – the Flash file with questions about circuits came from the Essex e-gfl site. You can see it here.

A battery with one bulb connected is your standard to compare things to. Electricity flows from one end of the battery to the other, flowing through the bulb as it goes, making the bulb light up.

Adding a second bulb in series will increase the total resistance in the circuit. The bulbs will be dimmer than the single bulb.

Adding a second bulb in parallel is a different situation. You have added a second pathway for the electricity to flow, The resistance is greater than a single bulb, but is is not as high as the two bulbs in parallel. The two bulbs will be brighter.

A “cars on the highway” analogy may help explain the distinction: think of a wide highway narrowing to a one-lane bridge to cross a river. Now imagine that in order to get rid of traffic jams, the highway department builds another one-lane bridge over the river. The “resistance” (in this case analogous to the width), of both bridges stays the same, but the amount of “current” or traffic that can cross the river has increased, so the overall “resistance” of the entire system has decreased. Taken from here.

In a series circuit, each bulb you add will make the brightness of the bulbs dimmer and dimmer

In a parallel circuit, the brightness of the bulbs does not change with the addition of more bulbs (but if you added many parallel circuits, eventually all of the bulbs would dim down as you approached the capacity of the battery)

This page from the BBC KS2 Bitesize site is pretty useful.

The GCSE Bitesize page may help explain things to you too.

It’s also worth looking at is this presentation from Skool.co.uk

More Links and Resources

Here are some more links that hopefully will help with teaching circuits

The free circuit builder Crocodile Elementary is now called Yenka Basic Circuits, and you can get it here. This will let you build circuits to your heart’s content!

From BBC Science Clips, try these resources:

http://www.bbc.co.uk/schools/scienceclips/ages/6_7/electricity.shtml

(http://www.bbc.co.uk/schools/ks2bitesize/science/activities/conductors.shtml)

(http://www.bbc.co.uk/schools/ks2bitesize/science/activities/changing_circuits.shtml)

Other Links

Make an Electric Circuit Online

BBC Learning Zone – Electricity Videos

The Blobz Guide to Circuits

PhET Circuit Builder

Cleo Circuit World

For a quick 10 minute preview, that explains some aspects of circuits. Go to Furry Elephant, and choose series or parallel circuits. It literally only allows you 10 minutes though.

Link to other Links Pages

E=TC3 6G Changing Circuits Page

E=TC3 4f Circuits and Conductors Page

TopicBox – Electricity

e-gfl Electricity resources

Some useful links for Day 3 – Materials

A good source of lesson ideas for all subjects (including materials) can be found at the Ictopus website. You need to register to download lessons, but it’s free to join.

There are some good Solids/Liquids/Gases resources on the ABPI website here. Here’s a direct link to the worksheets page.

Investigations

Scientific Enquiry Planning Poster can be found on this page (along with some other handy links) Direct link to the planning poster here.

Misconceptions and Science

Students Misconceptions in Science

Children’s understanding of scientific concepts : The role of misconceptions in planning for learning

Some research about transforming childrens ideas about science from the GTC.

The full video in all its glory

Diet coke and mentos from Danny Nicholson on Vimeo.

As streamed live onto the Internet via Qik.com