A sub-atomic particle with a positive charge. The spontaneous spreading of particles from an area of high concentration to an area of low concentration. The amount of mass per unit volume. A substance

Here are the answers to the questions:

SECTION A

1.2.1 A sub-atomic particle with a positive charge.

• Proton

1.2.2 The spontaneous spreading of particles from an area of high concentration to an area of low concentration.

• Diffusion

1.2.3 The amount of mass per unit volume.

• Density

1.2.4 A substance that cannot be broken down into simpler substances by chemical methods.

• Element

1.2.5 Matter that can flow and does not have a specific shape.

• Fluid

SECTION B

2.1 Identify the experiment illustrated by the diagram.

• Gas preparation and collection (or Thermal decomposition)

2.2 Write down a hypothesis for this experiment.

• If the substance in the test tube is heated, then a gas will be produced.

2.3 Identify independent variable.

• Heat (or Temperature)