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Students read a passage about a proposed fair test and then list four variables that need to be controlled.

Explain what affects the distance travelled by toy cars, and why they eventually stop. Assessment focus: science explanations using ideas about forces and energy.

For this practical task students investigate convection currents when tea leaves are placed into a beaker of water that is being heated. They are asked to make observations and to provide an explanation of what they have observed.

Students use the term force to explain why a heavier hammer could drive nails into denser material and explain density.

Students predict and investigate the way in which a concave and a convex lens distort the image of a pencil.

Students carry out a simple experiment with static electricity and then explain their findings.

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

For this task students select two kinds of activity from those labelled on a diagram of an erupting volcano. Students write a description and the problems or dangers associated with each activity.

From a diagram of an experimental set up, students answer questions based on fair testing principles. Questions cover the control of variables, and measurement of results.

For this practical task students follow a plan to determine the effects of a weak acid on different building materials. Students need to put their results into a table and write a conclusion.

For this practical task students follow a plan to determine the best temperature for the reaction of rennet with milk. Students need to make observations and write a report on their findings.

Task: Identify which variables should be kept the same to compare reaction times. Assessment focus: control of variables.

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

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

Task: Plan a fair test to see if adding salt water to water affects how long it takes to freeze. Assessment focus: managing variables.

Task: Describe what happens to ice in a glass of water, giving reasons, and explain where water forming on the outside of the glass comes from. Assessment focus: changes of state.

Task: Measure 100mL of water into three different pieces of equipment. Weigh the result and calculate the precision of using that piece of equipment. Assessment focus: measuring and evaluating the accuracy of equipment.

This practical task requires students to carry out three tests to find out if each element is a metal or non-metal.

Students outline four tests they could do to find out if a newly described substance is a metal.

Students outline a test they could do to show if a substance is a metal or not.

Task: Students place in order four beakers of copper sulphate solution from most to least concentrated. They then explain what would happen if two beakers were put together, and explain the term "concentration". Assessment focus: solutions.

Students are provided with some information about testing leaves for starch. They are required to match the steps in the process with their purpose, and to explain what substance is present that turns iodine blue-black.

Students are given an outline of a fair test. They are asked to identify the aim, variables to be controlled, how to judge the results, and an aspect of replication.

Students are given an experimental setup of heating water with a burning peanut and are asked how they could change this in three ways to get a greater temperature increase. Students are also asked to give two important experimental conditions that should remain the same if the experiment was repeated.

Students are given diagrams of an experiment on photosynthesis using pond weed. Students are asked to put the diagrams of the experiment into the correct order, to give an aim, identify the gas produced, name the process in plants that produces this gas, and to write a conclusion for the experiment.