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The Electromagnetic Spectrum

CONCEPTUAL
Science›Waves, Light & Sound|Ages 12—13|ID: mt_XSp-S0wter

Describe the full electromagnetic spectrum from radio waves to gamma rays, in order of increasing frequency and energy; explain that all EM waves travel at the same speed in a vacuum; and describe the uses and hazards of different regions

Mastery Evidence

  • Lists the seven regions of the EM spectrum in order of increasing frequency
  • States that all EM waves travel at 3 × 10⁸ m/s in a vacuum
  • Gives at least one use and one hazard for each region of the spectrum
  • Explains why some EM waves are more dangerous to living tissue than others (linked to frequency/energy)

Assessment Prompt

“If [child] heard about microwaves, X-rays, and visible light all being part of the same family, could they explain what makes them different from each other and name one useful application and one risk for each?”

Curriculum Standards2 alignments

MS-PS4-2Next Generation Science Standards (NGSS) Middle Schoolcodes only
Standard code — full text not included in this dataset.
KS3.Sci.Phys.Waves.1The national curriculum in England
Properties of Waves

the properties of waves, including how the speed of sound and light differ; reflection; refraction; the distinction between transverse and longitudinal waves; the electromagnetic spectrum and its uses

Science · KS3

Prerequisites3

Show full prerequisite tree
  • Wave Properties & Types hard

    The electromagnetic spectrum is understood as a family of transverse waves — requires the general wave properties framework

  • Reflection & Refraction soft

    Reflection and refraction of light provides entry-point experience with one member of the EM spectrum

    • Drawing Ray Diagrams hard

      The law of reflection is described and verified using ray diagrams for reflection

      • Measuring angles hard

        Drawing ray diagrams requires measuring angles accurately with a protractor — the core skill in mt_4MFUAsbx_6

        • Types of angles (age 8+) hard

          Measuring and drawing angles with a protractor requires knowing how to mark and label angles using standard notation

        • Degrees and turns hard

          Using a protractor requires understanding degree measurement

          • What Is an Angle? hard

            Degree measurement system requires understanding what an angle is

            • Types of angles hard

              Angle definition builds on understanding right angles

              • Right Angles & Turns hard

                Identifying right angles and greater/less than right angle is prerequisite to naming acute/obtuse

                • Understanding angles hard

                  Identifying right angles requires understanding what an angle is

                  • 2-D shapes (age 6+) soft

                    Understanding angles as shape properties requires knowing basic shape properties

                    • Angles in triangles (age 6+) soft

                      Understanding defining attributes supports describing shape properties formally

                      • 2-D shapes hard

                        Distinguishing defining vs non-defining attributes requires knowing common 2-D shape names first

                      • 3-D shapes (age 5+) hard

                        Identifying defining attributes builds on informal analysis and comparison of shapes

                    • 2-D shapes hard

                      Describing properties of 2-D shapes (sides, symmetry) requires knowing the shapes first

                    • 3-D shapes (age 5+) hard

                      Formal property description extends informal analysis of sides and vertices

                      • 2-D shapes hard

                        Analysing and comparing shapes requires being able to name them first

                      • 3-D shapes hard

                        Analysing 3-D shapes requires recognising and naming them

                  • Position, direction, and movement hard

                    Recognising angles as turns extends Y2 work on quarter/half/three-quarter turns

                    • Positional Language hard

                      Position/direction vocabulary with right angles extends basic positional language

                    • Turns & Directions hard

                      Right-angle turns (clockwise/anti-clockwise) build directly on whole/half/quarter turns from Year 1

                      • What Is a Half? soft

                        Understanding half and quarter turns benefits from the concept of halves and quarters

                      • Positional Language hard

                        Describing movement and turns builds on positional language

                • Types of angles (age 8+) soft

                  Identifying right angles and turns is supported by the convention of marking right angles with a small square

                • Position, direction, and movement hard

                  Right angles as quarter turns extends Y2 turn vocabulary

                  • Positional Language hard

                    Position/direction vocabulary with right angles extends basic positional language

                  • Turns & Directions hard

                    Right-angle turns (clockwise/anti-clockwise) build directly on whole/half/quarter turns from Year 1

                    • What Is a Half? soft

                      Understanding half and quarter turns benefits from the concept of halves and quarters

                    • Positional Language hard

                      Describing movement and turns builds on positional language

            • Right Angles & Turns hard

              Angle definition builds on classifying acute/obtuse angles

              • Understanding angles hard

                Identifying right angles requires understanding what an angle is

                • 2-D shapes (age 6+) soft

                  Understanding angles as shape properties requires knowing basic shape properties

                  • Angles in triangles (age 6+) soft

                    Understanding defining attributes supports describing shape properties formally

                    • 2-D shapes hard

                      Distinguishing defining vs non-defining attributes requires knowing common 2-D shape names first

                    • 3-D shapes (age 5+) hard

                      Identifying defining attributes builds on informal analysis and comparison of shapes

                      • 2-D shapes hard

                        Analysing and comparing shapes requires being able to name them first

                      • 3-D shapes hard

                        Analysing 3-D shapes requires recognising and naming them

                  • 2-D shapes hard

                    Describing properties of 2-D shapes (sides, symmetry) requires knowing the shapes first

                  • 3-D shapes (age 5+) hard

                    Formal property description extends informal analysis of sides and vertices

                    • 2-D shapes hard

                      Analysing and comparing shapes requires being able to name them first

                    • 3-D shapes hard

                      Analysing 3-D shapes requires recognising and naming them

                • Position, direction, and movement hard

                  Recognising angles as turns extends Y2 work on quarter/half/three-quarter turns

                  • Positional Language hard

                    Position/direction vocabulary with right angles extends basic positional language

                  • Turns & Directions hard

                    Right-angle turns (clockwise/anti-clockwise) build directly on whole/half/quarter turns from Year 1

                    • What Is a Half? soft

                      Understanding half and quarter turns benefits from the concept of halves and quarters

                    • Positional Language hard

                      Describing movement and turns builds on positional language

              • Types of angles (age 8+) soft

                Identifying right angles and turns is supported by the convention of marking right angles with a small square

              • Position, direction, and movement hard

                Right angles as quarter turns extends Y2 turn vocabulary

    • Reflecting Light soft

      Earlier work on light reflecting from surfaces provides the experiential grounding for formal reflection laws

    • Light Travels in Straight Lines hard

      Reflection and refraction build directly on understanding that light travels in straight lines and casts shadows

    • Wave Behaviour Vocabulary hard

      Applying the law of reflection and refraction requires both 'angle of incidence/reflection' and 'refraction' vocabulary

  • Observing with Light Waves soft

    EM spectrum as astronomy tool depends on knowing the full EM spectrum from radio to gamma

    • Why the Sun Looks Brightest hard

      Using the EM spectrum as an astronomy tool depends on understanding stellar brightness and magnitude

      • The Sun is a star hard

        Must know the Sun is a star before understanding why it appears brighter than other stars

        • Sun, Moon & Stars hard

          Must know the Sun is a sky object before learning it is a star

          • Why seasons change soft

            Curriculum daylight/seasons observation supports exploratory Sun/Moon/stars identification

            • Naming the Planets soft

              Relating daylight length to time of year draws on orbit and solar system vocabulary

            • Seasonal changes soft

              Seasonal changes observation supports daylight pattern recognition

        • Our Solar System hard

          Must know about the solar system before learning the Sun is at its centre

          • Sun, Moon & Stars hard

            Must know the Sun and stars before learning about planets and the solar system

            • Why seasons change soft

              Curriculum daylight/seasons observation supports exploratory Sun/Moon/stars identification

              • Naming the Planets soft

                Relating daylight length to time of year draws on orbit and solar system vocabulary

              • Seasonal changes soft

                Seasonal changes observation supports daylight pattern recognition

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