Practise your skills of proportional reasoning with this interactive haemocytometer.
Examine these estimates. Do they sound about right?
Estimate these curious quantities sufficiently accurately that you can rank them in order of size
Work with numbers big and small to estimate and calculate various quantities in biological contexts.
Work out the numerical values for these physical quantities.
Work with numbers big and small to estimate and calulate various quantities in biological contexts.
Is this eco-system sustainable?
Which units would you choose best to fit these situations?
How many generations would link an evolutionist to a very distant ancestor?
When you change the units, do the numbers get bigger or smaller?
Could nanotechnology be used to see if an artery is blocked? Or is this just science fiction?
How much energy has gone into warming the planet?
How would you go about estimating populations of dolphins?
Are these estimates of physical quantities accurate?
Work with numbers big and small to estimate and calculate various quantities in physical contexts.
Is it really greener to go on the bus, or to buy local?
Can you rank these sets of quantities in order, from smallest to largest? Can you provide convincing evidence for your rankings?