How Big is the Earth?

Age range: 12 – 16 years
Prep. time: 15 minutes + the time to find a partner school
Lesson time: 30 minutes
Cost per activity:  0
Includes the use of: calculator

In this exercise, we will measure the circumference of the Earth using the same procedure as Eratosthenes did 240 BC. To do this, we need to measure the height of the sun in two locations directly north-south of each other. Are you able to get answers close to the result we have today?

In this lesson students will also use techniques including basic mathematics (multiplication and division), measurement techniques, and geometry.

Student Guide

Teacher Guide

Identifying Micrometeorites

Did you find a curious looking rock? With the help of these instructions you can investigate if it could be a meteorite.

This presentation will lead you through the common features of micrometeorites, including magnetism, weight, surface features and evidence of fusion crust, chondrules, metal flakes, patina and rust.

Interesting findings are worth submitting to an expert for analysis. With scientific methods any meteorites can be reliably identified and categorised. The presentation also guides you to where you might find such advice!

This resource is also available in Finnish.

Slide Pack – English

Slide Pack – Finnish

Children of the Stars

Have you ever wondered what your body is made of? Or how much of each element you contain? Use this calculator to find out! Every element you contain that is heavier than hydrogen and helium was created over billions of years during the various developmental stages of stars. So we are made of star stuff!

This material is also available in:

Keywords: elements, stellar evolution, human body

Colour the universe

Why is the Sun green in a photo taken with a UV camera? We can’t actually see UV light, so the colour of the photo was just chosen to be green!

In this assignment, you can choose any colour scale for an image of space taken to capture a specific wavelength of light. This activity is about making space images more interesting to look at! Which colours make the image look the most interesting?

This material is also available in:

Keywords: colour, light, wavelength