Challenge Level

Can you rank these sets of quantities in order, from smallest to largest? Can you provide convincing evidence for your rankings?

Challenge Level

Examine these estimates. Do they sound about right?

Challenge Level

Work with numbers big and small to estimate and calculate various quantities in biological contexts.

Challenge Level

Work out the numerical values for these physical quantities.

Challenge Level

Work with numbers big and small to estimate and calulate various quantities in biological contexts.

Challenge Level

Is it really greener to go on the bus, or to buy local?

Challenge Level

When you change the units, do the numbers get bigger or smaller?

Challenge Level

Work with numbers big and small to estimate and calculate various quantities in physical contexts.

Challenge Level

How many generations would link an evolutionist to a very distant ancestor?

Challenge Level

How would you go about estimating populations of dolphins?

Challenge Level

Which units would you choose best to fit these situations?

Challenge Level

Could nanotechnology be used to see if an artery is blocked? Or is this just science fiction?

Challenge Level

Estimate these curious quantities sufficiently accurately that you can rank them in order of size