4.3 Understand that energy is conserved

4.2 what does potential mean

energy transfers involving the following forms of energy: thermal (heat), light, electrical, sound, kinetic, chemical, nuclear and potential (elastic and gravitational)

Potential  means stored energy.

Scientific Facts I need to remember to improve

3.19 Experiment to determine the refractive index of glass, using a glass block

3.17 Investigate the refraction of light, using rectangular, semicicular blocks and triangular prisms

3.16 Plane mirrors

For plane mirrors, the image would be.....

• The same size as the object.
• The same distance as the object from the mirror.
• Virtual (not real).
• Upright.
• Laterally inverted.

3.15 Light waves are transverse waves which can be reflected, refracted and diffracted

Angle of incidence i	Angle of reflection r
10o	10o
20o	20o
30o	30o
40o	40o
50o	50o

Formula: i = r