NASA is always on the lookout for earth-like planets that we might be able to colonise in the future. 71% of the Earth’s surface is covered in water. That sounds like a lot, but how much can we actually drink? Use your mathematics skills to determine the actual amount of potable water on Earth, so NASA has a clearer idea of what to be looking for.
Lesson guides and printables
- Coloured pencils or markers
- Measuring cup, 100 ml
- Measuring jug, 1 litre
- Water from the tap
- Writing pen or pencil
Tips for parents and carers
Some mess might be created as kids use water from the sink. Encourage them to be careful and to wipe up after themselves.
Kids should get eye level with the scale on the side of measuring jugs and cups to ensure they measure accurately.
Learning@Home resources are designed for parents and teachers to use with children in the home environment. They can be used as stand-alone activities or built into existing curriculum-aligned learning programs. Our Learning@Home series includes two types of resources. The first are fun and challenging real-world activities for all ages, the second are self-directed lessons for upper primary and secondary students. These lessons support independent learning in remote or school settings.