What do they think the SPF number on sunscreen means? SPF stands for sun protection factor. It’s the measure of how much UV gets through the screen. The higher the number, the less UV passes ...

JOSHUA: The thing that looks like a star is the Sun. NARRATOR: Well done ... This topic appears in KS1/KS2 in England and Northern Ireland, Key Stage 2 in Wales and Early/1st/2nd level in Scotland.