Students are given the formula of two different types of chlorophyll. Students name all the elements present, and how the number of atoms differs between the chlorophylls.
Students are provided with information about a genetic trait. They develop genotypes for the parents involved and then complete a punnet square for these.
Task: Explain how to use the magnet to remove a drawing pin out of a glass of water without putting the magnet in the glass, touching the glass with hands, or spilling the water. Assessment focus: using knowledge of magnetism to solve a problem.
Students are given information and a diagram about a drink bottle overflowing when it had been put into the freezer. Students are asked to explain why this happened and how they could prevent it.