Mr Chittenden’s Science Lab

Year 11 Set 2 Students!

Here are your homework questions.  Please leave your first name and initial, and post DETAILED answers.  I will not reveal them until our next lesson, so you can’t copy anyone elses!

A chemist investigates the reaction of marble chips with hydrochloric acid.  He measures the time taken for 100 cubic centimetres of carbon dioxide gas to be formed.

1) How might he collect the gas formed?

At 60 degrees C, with a 1M solution of acid, and using 1g of marble chips, the reaction takes 13.7 seconds

For each of the following changes, describe the a) effect on time taken, b) effect on rate, and c) explain why this happens, using collision theory

2) With crushed marble instead of chips

3) With a more dilute acid solution

4) At a lower temperature

Year 10 Set 1 Students!

Here are your homework questions.  Please leave your first name and initial, and post DETAILED answers.  I will not reveal them until our next lesson, so you can’t copy anyone elses!

A chemist investigates the reaction of marble chips with sulphuric acid.  He measures the time taken for 100 cubic centimetres of sulphur dioxide gas to be formed.

1) How might he collect the gas formed?

At 20 degrees C, with a 1M solution of acid, and using 1g of marble chips, the reaction takes 33.7 seconds

For each of the following changes, describe the a) effect on time taken, b) effect on rate, and c) explain why this happens, using collision theory

2) With crushed marble instead of chips

3) With a more concentrated acid solution

4) At a higher temperature

So the Mock SATs are now complete.  Here is your chance to give your opinion on how the tests went.  Please post any feedback as follows:

1) How do you feel you got on?  Why?

2) What revision techniques have you been using at home?  How have they gone so far?

3) Where do you think your weaknesses are?  What sort of question did you struggle on in the mocks?

Thank you

For the next 3 lessons, your task, Year 8 Scientists, is to work in a group to produce a book with the title “The Solar System”.

Your book should include:

• Front cover
• Contents page
• The order of the planets / mneumonic
• Facts and statistics about each planet
• Relevant pictures
• Anything else that you would like to include

To get you started on your personal research, try the following links which will open in a new window:

http://www.extremescience.com/earthsciport.htm

http://www.nineplanets.org/

http://www.kidsastronomy.com/solar_system.htm

And how about this?!  You can take a virtual tour of the surface of Mars here:

http://www.google.com/mars/

The moon is on there too (the moon is a satellite of Earth):

http://www.google.com/moon/

Attention Year 11 Students!  Following the ISA last week, I would like to read any feedback you can offer - in the WWW/EBI format (what went well / even better if…).  Please post comments to this message, you may leave your name if you wish. 

Please note that comments are moderated - this means that someone checks that they are not rude or abusive before they appear on the blog.  This takes a little while so if your comment does not appear immediately, check back a few hours later.