Water freezes at 0°Celsius (32°Fahrenheit) and boils at 100°C (212°Fahrenheit). Is there a temperature at which Celsius and Fahrenheit readings are the same?
Which countries have the most naturally athletic populations?
Can you work out which drink has the stronger flavour?
Which dilutions can you make using only 10ml pipettes?
Andy wants to cycle from Land's End to John o'Groats. Will he be able to eat enough to keep him going?
The triathlon is a physically gruelling challenge. Can you work out which athlete burnt the most calories?
Is it cheaper to cook a meal from scratch or to buy a ready meal? What difference does the number of people you're cooking for make?
Make your own pinhole camera for safe observation of the sun, and find out how it works.
Have you ever wondered what it would be like to race against Usain Bolt?
An observer is on top of a lighthouse. How far from the foot of the lighthouse is the horizon that the observer can see?
Many physical constants are only known to a certain accuracy. Explore the numerical error bounds in the mass of water and its constituents.
Use the computer to model an epidemic. Try out public health policies to control the spread of the epidemic, to minimise the number of sick days and deaths.
Get some practice using big and small numbers in chemistry.
Make an accurate diagram of the solar system and explore the concept of a grand conjunction.
Can you sketch graphs to show how the height of water changes in different containers as they are filled?
Can you work out what this procedure is doing?
Examine these estimates. Do they sound about right?
To investigate the relationship between the distance the ruler drops and the time taken, we need to do some mathematical modelling...
Could nanotechnology be used to see if an artery is blocked? Or is this just science fiction?
If I don't have the size of cake tin specified in my recipe, will the size I do have be OK?
Imagine different shaped vessels being filled. Can you work out what the graphs of the water level should look like?
When a habitat changes, what happens to the food chain?
Can you visualise whether these nets fold up into 3D shapes? Watch the videos each time to see if you were correct.
Two trains set off at the same time from each end of a single straight railway line. A very fast bee starts off in front of the first train and flies continuously back and forth between the. . . .
Explore the properties of isometric drawings.
Investigate circuits and record your findings in this simple introduction to truth tables and logic.
Can you rank these sets of quantities in order, from smallest to largest? Can you provide convincing evidence for your rankings?
What shape would fit your pens and pencils best? How can you make it?
How would you design the tiering of seats in a stadium so that all spectators have a good view?
Learn about the link between logical arguments and electronic circuits. Investigate the logical connectives by making and testing your own circuits and fill in the blanks in truth tables to record. . . .
Can you suggest a curve to fit some experimental data? Can you work out where the data might have come from?
Use trigonometry to determine whether solar eclipses on earth can be perfect.
Work with numbers big and small to estimate and calulate various quantities in biological contexts.
How would you go about estimating populations of dolphins?
These Olympic quantities have been jumbled up! Can you put them back together again?
Can you deduce which Olympic athletics events are represented by the graphs?
Are these estimates of physical quantities accurate?
Work with numbers big and small to estimate and calculate various quantities in physical contexts.
Which units would you choose best to fit these situations?
When you change the units, do the numbers get bigger or smaller?
Invent a scoring system for a 'guess the weight' competition.
Use your skill and knowledge to place various scientific lengths in order of size. Can you judge the length of objects with sizes ranging from 1 Angstrom to 1 million km with no wrong attempts?
How much energy has gone into warming the planet?
Work out the numerical values for these physical quantities.
Estimate these curious quantities sufficiently accurately that you can rank them in order of size
Is it really greener to go on the bus, or to buy local?
Does weight confer an advantage to shot putters?
Explore the relationship between resistance and temperature
Can Jo make a gym bag for her trainers from the piece of fabric she has?
How do you write a computer program that creates the illusion of stretching elastic bands between pegs of a Geoboard? The answer contains some surprising mathematics.