Submarine Lesson 2 - How big and how deep is the ocean?

The second lesson in this unit focusses on students understanding the depth of the ocean and the challenges deep sea exploration poses.

Years: 3, 4, 5, 6

Duration: 60mins

Curriculum Objectives: 4

Subject: Science

Resource Overview

Submarine STEM 7-11 delivers a comprehensive scheme of work covering Materials, Forces and Living things and develops students’ ability to work scientifically. The unit is based on the exploratory submersible journeys undertaken as part of the XL Catlin Deep Ocean Survey off Bermuda, the Sargasso Sea (between Bermuda and Canada) and off Canada’s east coast. Using exclusive galleries, videos and online 360 VR technology students are fully immersed in the deep ocean. Students will understand the scale and depth of the ocean, explore and investigate the creatures which inhabit this inhospitable environment and consider how forces and materials are integral to submersible design. Throughout the unit students plan, carry out and evaluate scientific investigations, culminating in an exciting DT challenge.

Thank you to EncounterEdu for allowing us to share this resource.

Resource Assets


What lives in the deep sea? PowerPoint

A slideshow focused on finding out just how deep the ocean can be and exploring some of the submersibles we use in deep sea exploration. Students start thinking about why exploration of this kind is so challenging and consider some of the dangers they might face. What do you think it’s like inside a submersible? Are you brave enough to travel to this dark and mysterious place?


Ocean Depths - Activity Overview 2a

This activity allows students to map out a scale demonstrating the depth of the ocean.


Deep Sea Funnies - Student Sheet 2a

Just what is marine snow? Time to find out!


Point of Interest Cards - Student Sheet 2b

Fascinating facts brought to life by wonderful photographs


Ocean Zones - Student Sheet 2c

A worksheet designed to support understanding of ocean depth


What lives in the deep sea? Teacher Guidance

A step by step guide to delivering the lesson with confidence including clear learning outcomes.

Curriculum Objectives

  • Key Stage 2 (Age 7-11)
    • Key Stage 2 (Age 7-11)
      • Year 4 (Age 8-9)
        • Year 3 (Age 7-8)
          • Ask relevant questions and use different types of scientific enquiries to answer them
  • Year 4 (Age 8-9)
    • Recognise that living things can be grouped in a variety of ways.
  • Year 6 (Age 10-11)
    • Describe how living things are classified into broad groups according to common observable characteristics and based on similarities and differences, including micro-organisms, plants and animals.