Uploaded February 2026 | Updated September 2026, 12 hours ago
Find your 9s with PLUS. Click the link to try for free freesciencelessons.co.uk/modules/gcse-biology-1-triple
Teachers, to get PLUS for your school, email schools@freesciencelessons.co.uk
In this video, we look at the idea of order of magnitude. I take you through the idea of order of magnitude and explain to you a simple method to calculate the value. Then I give you a question to try yourself.
This video is based on the AQA spec. This video may be appropriate for iGCSE / O Level Biology. Please consult your specification. The Amazon link above is an affiliate link. This provides a small commission which helps to support freesciencelessons. The cost remains the same to you. If you prefer not to use this, you can search Amazon for the Freesciencelessons workbooks.
Image credits:
Apple By Abhijit Tembhekar from Mumbai, India (Nikon D80 Apple) [CC BY 2.0 (creativecommons.org/licenses/by/2.0)], via Wikimedia Commons
Orange By Ankara (Own work) [CC BY-SA 3.0 (creativecommons.org/licenses/by-sa/3.0) or GFDL (gnu.org/copyleft/fdl.html)], via Wikimedia Commons
Pineapple By Alvesgaspar (Own work) [CC BY-SA 3.0 (creativecommons.org/licenses/by-sa/3.0) or GFDL (gnu.org/copyleft/fdl.html)], via Wikimedia Commons
Lemon By Bordercolliez - Own work, CC0, commons.wikimedia.org/w/index.php?curid=16885868
Woodlouse By Alvesgaspar (Own work) [GFDL (gnu.org/copyleft/fdl.html) or CC BY-SA 3.0 (creativecommons.org/licenses/by-sa/3.0)], via Wikimedia Commons
German shepherd By Ellen Levy Finch (Elf) - Own work, CC BY-SA 3.0, commons.wikimedia.org/w/index.php?curid=80113
Cheek cells
commons.wikimedia.org/wiki/File:Cheekcells_stained.jpg
Mulletsrokk, CC BY-SA 3.0 creativecommons.org/licenses/by-sa/3.0, via Wikimedia Commons
Find your 9s with PLUS. Click the link to try for free freesciencelessons.co.uk/modules/gcse-biology-1-triple
Teachers, to get PLUS for your school, email schools@freesciencelessons.co.uk
In this video, we look at the idea of order of magnitude. I take you through the idea of order of magnitude and explain to you a simple method to calculate the value. Then I give you a question to try yourself.
This video is based on the AQA spec. This video may be appropriate for iGCSE / O Level Biology. Please consult your specification. The Amazon link above is an affiliate link. This provides a small commission which helps to support freesciencelessons. The cost remains the same to you. If you prefer not to use this, you can search Amazon for the Freesciencelessons workbooks.
Image credits:
Apple By Abhijit Tembhekar from Mumbai, India (Nikon D80 Apple) [CC BY 2.0 (creativecommons.org/licenses/by/2.0)], via Wikimedia Commons
Orange By Ankara (Own work) [CC BY-SA 3.0 (creativecommons.org/licenses/by-sa/3.0) or GFDL (gnu.org/copyleft/fdl.html)], via Wikimedia Commons
Pineapple By Alvesgaspar (Own work) [CC BY-SA 3.0 (creativecommons.org/licenses/by-sa/3.0) or GFDL (gnu.org/copyleft/fdl.html)], via Wikimedia Commons
Lemon By Bordercolliez - Own work, CC0, commons.wikimedia.org/w/index.php?curid=16885868
Woodlouse By Alvesgaspar (Own work) [GFDL (gnu.org/copyleft/fdl.html) or CC BY-SA 3.0 (creativecommons.org/licenses/by-sa/3.0)], via Wikimedia Commons
German shepherd By Ellen Levy Finch (Elf) - Own work, CC BY-SA 3.0, commons.wikimedia.org/w/index.php?curid=80113
Cheek cells
commons.wikimedia.org/wiki/File:Cheekcells_stained.jpg
Mulletsrokk, CC BY-SA 3.0 creativecommons.org/licenses/by-sa/3.0, via Wikimedia Commons
