Science secrets revealed at school fair
THE bunsen burners were firing and the V8 engine was revving for the Faith Baptist Christian College's second science fair on Thursday.
Students from all grades set up stalls with different experiments, ready to show fellow students their discoveries.
Two rooms of the church hall were full of interesting displays covering subjects including magnetism, the V8 engine, floating corks, flames, food science, art science and static electricity.
Melissa Fourie and Marelize Louw, both 13, experimented with the effectiveness of sunscreens using ultraviolet-sensitive paper.
They found SP 50+ was the best protection.
"We put a section of sunscreen and lotions on a piece of blue paper and then put it out in the sun," Melissa said.
"People have been very interested and they questioned the sunscreen they use.
"Cream is better than roll-on and sun shirts are good, too."
Rachel Chanoff and Joe Perchard, in year 10 and 11, put small samples of salt, calcium, potassium and copper sulphate onto a bunsen burner flame to see how the colour changed.
"I like fire and just watching the flames is cool," Rachel said.
"The preps were like 'wow' when the flame turned green. It was so cute."
The chemicals are used to create the colour in fireworks.
Over the other side of the room, Jacksen Warhurst, Leanna Tankard, Takeira John and Annaliese Weinholz were mixing milk, detergent and food colouring. "You drop a bit of food colouring on the milk first," Annaliese said.
"Then you put your cotton wool stick in detergent and touch the food colouring.
"The surface tension separates the food colouring to make it bloom out."