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

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

Challenge Level

Use trigonometry to determine whether solar eclipses on earth can be perfect.

Challenge Level

Work out the numerical values for these physical quantities.

Challenge Level

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

Challenge Level

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

Challenge Level

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

Challenge Level

Many physical constants are only known to a certain accuracy. Explore the numerical error bounds in the mass of water and its constituents.

Challenge Level

Get some practice using big and small numbers in chemistry.

Challenge Level

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

Challenge Level

Make an accurate diagram of the solar system and explore the concept of a grand conjunction.

Challenge Level

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

Challenge Level

Explore the distribution of molecular masses for various hydrocarbons

Challenge Level

Investigate the molecular masses in this sequence of molecules and deduce which molecule has been analysed in the mass spectrometer.