Elementary Science - Forces - Upthrust

In this MEL Academy lesson your children will:

  • learn about upthrust
  • see the the Archimedes experiment
  • assemble you own swimming diver

Lesson time

5:00am   PST (San Francisco, Seattle, ...)
6:00am   MST (Phoenix, Denver, ...)
7:00am   CST (Chicago, Houston, ...)
8:00am   EST (New York, Toronto, ...)
1:00pm   GMT (London, ...)

Lesson duration: 45-55 minutes.

Prepare in advance

In this lesson, we will conduct several DIY experiments. Prepare in advance household materials shown below.

DIY Materials

  Empty eye dropper (optional)
  3 x 20cm squared piece of aluminium foil
  Access to water
  Big bowl or a basin
  5 different coins
  330ml to 1ltr clear plastic bottle with screw top
  2 x plastic straws (ideally flexible bendy ones)
  Drawing pin
  Paper clips
  Bluetack (optional)
  Small empty clear plastic MEL reagent bottle (optional)


Please, download and print this worksheet in advance. You’ll need to refer to it during the lesson.


This lesson is presented by Mark Maclaine:

Mark Maclaine

Mark has been an educator for 20 years and has taught more than 20,000 hours of one-on-one lessons to over 1200 students. He initially struggled in school as the academic study didn’t come naturally to him. What was a weakness has become one of his greatest strengths - finding he is able to connect with students who are themselves struggling. Using a set of skills developed over the past two decades and his RELATE Teaching Method, Mark has become one of the best-known educators in the world. He is passionate about his work and is committed to transforming the education system so it works for everyone.