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Students carry out a simple experiment to illustrate refraction. They then explain why this happened.

Students carry out and make observations about water in a straw, and suction. Students are then required to explain their observations.

Students are given two equations describing the burning of petrol. Students identify each as either complete or incomplete combustion and then describe two disadvantages of incomplete combustion.

Students answer five questions about 'fair testing' for an outlined investigation.

Students use ratios and proportional reasoning to compute various amounts.

Students outline four ways of improving a given plan for an investigation to make it a fair test.

Information on particle size and boiling point is provided for three alcohols. Students use this to place these substances in order of particle size and increasing boiling point.

Students compute how much each of two people get when given amounts are divided according to given ratios in a variety of contexts.

Students use diagrams of rock layers to answer questions concerning geological history, oldest layer, and to account for the presence of fossils.

Students find a missing number using clues about what remainder there is when the number is divided by given numbers.

Students calculate the volume and surface area of a cuboid box.

Students calculate the weight for different numbers of soccer balls and calculate the weight for a given number of soccer balls.

Students calculate the shapes with the largest and smallest perimeter and identify a relationship between the features of a shape and the perimeter.

Students explain why most of a saucepan is made of metal but has a handle made of wood.

Students identify in which order candles will go out and explain their answer. Assessment focus: the role of oxygen in combustion.

Students identify the correct denominator as numerator to create equivalent fractions for a range of given fractions. Optional space for diagrams is provided.

Students calculate the number of containers needed for given amounts of fruit for a recipe.

Students calculate addition and subtraction problems, written in decimal form, for city populations.

Students calculate the cost of several cans of soft drinks, the maximum number bought for a given cost, and the change given after buying several cans.

Students use addition and subtraction to calculate temperatures over periods of time.

Students use multiplication and division to work out the number of boxes of cherries picked, and cartons filled.

Students calculate the numbers of pieces of fruit and vegetables divided evenly into bags, and any remainder.

Students calculate the number of free gifts distributed at a Tennis Championship given the number of people entering and the frequency of the gifts given away.

Students answer four multiple choice questions identifying which three-digit number can be divided by a one-digit number to get a given remainder.

Students select which four-digit numbers can be divided by a one-digit number without a remainder.