Year 9 Science | Fun Learning Quest for Kids

You're making a cup of tea at home. You drop a tea bag into a mug of hot water and another into cold water. The tea diffuses faster in the hot water. Which particle theory concept best explains this?

A sample of pounamu (greenstone) is mostly made of the element silicon (Si). What single piece of information from the periodic table tells you that silicon is a different element from oxygen (O)?

You find black ironsand on a West Coast beach. Over time, it rusts when exposed to air and water. The rust that forms has a larger mass than the original iron. Which statement correctly explains this using the law of conservation of mass?