The total world population in 2017 is 7.5 billion (7,500,000,000). What percentage of the world population is without safe drinking water?
The world […]
You will need a collection of jars and bottles of different sizes and shapes, like those in the picture. Alternatively you can do this activity with 2 or more jars or bottles and some water or with paper cups of different sizes and sand.
Which holds the most? Which holds the least? […]
Which cup would you fill with water if you are really thirsty and want a lot to drink?
Can you estimate how tall he is? How tall do you think Little Man’s mug might be?
My mug is 10 centimetres tall and it holds 300 millilitres but mugs come in different […]