Physics:

Electricity:

• associate the brightness of a lamp or the volume of a buzzer with the number and voltage of cells used in the circuit;
• compare and give reasons for variations in how components function, including the brightness of bulbs, the loudness of buzzers and the on/off position of switches;
• use recognised symbols when representing a simple circuit in a diagram.
• will work scientifically by identifying the effect of changing one component at a time in a circuit;
• will work scientifically by designing and making a pressure switch for a burglar alarm within a simple circuit.

Light:

• recognise that light appears to travel in straight lines;
• use the idea that light travels in straight lines to explain that objects are seen because they give out or reflect light into the eye;
• explain that we see things because light travels from light sources to our eyes or from light sources to objects and then to our eyes;
• use the idea that light travels in straight lines to explain why shadows have the same shape as the objects that cast them;
• will work scientifically by making a periscope and using the idea that light appears to travel in straight lines to explain how it works.
• They will investigate the relationship between light sources, objects and shadows by using shadow puppets (linked with art topic later in the year).