Solutions

1. 400 nm  to 700 nm (One mark per correct value) (2)
2. Visbile light: to see; Xrays: to inspect bones without surgery; Gamma rays: to kill bacteria; UV: suntanning, helps bees navigate, powers photosynthesis; Infrared: night vision, heat radiation, some lasers; Microwaves: telecommunications, radar, ovens; Radio waves: telecommunications. (any 5) (5)
3. She can project the light from the star through a spectroscope which splits it into its components. She can then compare the spectrum to known emission spectra of known elements. (3)
4. Any value 700-600 nm(it's continuous); Any value near 400-450 nm. (2)
5. UV has a short wavelength which means that it has high energy levels. (2)
6. Gamma.  (1)
7. Cu / Copper: blue / green / cyan / blue-green / turquoise; Strontium / Lithium: Red; Iron / Sodium / Calcium / Na / Fe / Ca: orange / yellow; Magnesium / Mg / Aluminium / Aℓ: White ; Potassium/K: lilac / violet; Green: Barium / Ba (light green), possibly Copper / Cu (darker green). (any one) (1)
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