Level 1 Science As 90940 Mechanics for experts the bloodhound project

by | Mar 4, 2013 | school posts, Year 11, K-12

Only attempt this work if you have completed the homework in the post before this and want a tougher challenge

Read about the engineering problems associated with the bloodhound project and the attempt to beat the air speed record on the ground. Yes travel faster on the ground than we can travel in the air.

Now tackle some rudimentary engineering calculations using information about the car.

 

  1. Calculate the average acceleration over 42 seconds. You will need to convert the speed to metric units.
  2. Then calculate the unbalanced force that would produce this acceleration.
  3. Estimate the average frictional forces opposing motion.
  4. Discuss all the frictional forces, some are helpful some are not
  5. Discuss any assumptions made when you calculate the average frictional forces opposing motion. Are they realistic?

Year 10 Ecology revision: The carbon Cycle

by | Mar 1, 2013 | school posts, Year 10, K-11

The Carbon Cycle

  1. Study the diagram
  2. read the notes after it
  3. attempt the carbon Cycle quiz

Overview:

Carbon atoms are found in all food molecules. They form the framework. Food molecules include starches sugars fats and proteins

Carbon starts out as carbon dioxide in the atmosphere. Plants trap it as food molecules during the process of photosynthesis. Carbon is first stored in producers.

Carbon is passed from producers to consumers as plants are eaten

At each stage as living things breathe and respire to release oxygen carbon is returned to the atmosphere as carbon dioxide. (you respire, you breathe air in and breathe out carbon dioxide)

Some of the carbon inside plants gets trapped in wood coal and oil.. When we burn fuels to release energy the carbon is returned to the atmosphere as carbon dioxide.

Now try the questions in the carbon cycle quiz

Year 10 Ecology revision: The carbon Cycle

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Year 9 Science: Lab Safety

by | Mar 1, 2013 | school posts, Year 09, K-10

How many dangerous activities can you see in this picture?

Chose five things that look dangerous. Tell me in a few sentences what the student should be doing to keep safe.

Once you have answered as much as you can don’t forget to press the submit button

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