Changes resources

This practical task requires students to describe to a partner their observations about an ice cube melting. Students then develop questions about what they observe.

This practical task requires students to make observations of the changes that occur in five common foods as they are cooked.

Students place in order, four diagrams showing the steps for making copper sulphate crystals.

Using provided data students decide which of three liquids would freeze if placed in a freezer. Students explain what happens to particles when they freeze and how the level changes due to freezing.

Task: Answer questions about the fire triangle. Assessment focus: elements necessary for combustion.

Students decide on the variables that will make an experiment about boiling water a fair test. Assessment focus: Recognising multiple variables.

Students identify the changes of state that are occurring in a diagram showing the separation of fresh water from seawater.

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.

Task: Identify the variables for testing how fresh water and salt water affect rusting. Assessment focus: planning a fair test.

Task: Students draw a picture of a burning candle to show changes that occur. Assessment focus: representing the way particles behave when material undergoes temporary and permanent changes.

Students look at two diagrams. The first shows iron nails in test tubes with boiled water or tap water, the second shows iron nails with moisture either present or absent. Students answer five questions about these investigations.

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.

The liquid range for four common substances has been provided. Students use this to answer questions about melting point, boiling point, and state.

Students select which type of sugar would dissolve fastest and explain why.

Students indicate for each of six different variables those that need to be kept the same for an investigation about dissolving different types of sugar.

Students answer one multiple-choice question about how the mass of a burning object changes.

Students use a table of information on melting points and boiling points of six different substances to answer questions about states of matter.

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.

This task consists of two multiple-choice questions on humidity.

This task requires students to give three ways of keeping a sandwich fresh for lunch.

Task: Select which state of water applies to a list of places where water can be found. Assessment focus: states of water.

Students construct a line graph from provided data, and then write a summary about the data.

This practical task investigates the effect of temperature on the rate at which corn pops. Students collect data and make a conclusion.

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.

Students classify five described changes as either a chemical or a physical change.