Science at key stage 3 (Year 7)

Unit 7G: Particle model of solids, liquids and gases

Objectives

Section 1: How can we explain evidence from experiments?
Children should learn:

to classify materials as solid, liquid or gas
to use their existing knowledge and understanding to interpret and explain results
to work together, listening to and evaluating the contributions of others
that discussion can help clarify ideas

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Section 2: How are theories created?
Children should learn:

to share and discuss ideas
that theories are based on experimental data
that sometimes new evidence results in changes to theories

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Section 3: What are the differences between solids, liquids and gases?
Children should learn:

that materials can be classified as solid, liquid or gas, but that some are difficult to classify
to evaluate their own theory in the light of evidence

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Section 4: How can the particle model explain the differences between solids, liquids and gases?
Children should learn:

that models can be used to explain phenomena which cannot be observed
that sometimes new evidence requires changes to models
that solids, liquids and gases are made up of tiny particles
that the differences between solids, liquids and gases can be explained in terms of the proximity and motion of their particles

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Section 5: a. How can the particle model explain other phenomena?
Children should learn:

to apply a model to new phenomena to explain behaviour
how discussion can help clarify ideas

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Section 6: b. How can the particle model explain other phenomena?
Children should learn:

that gas particles are moving around all the time
that gas pressure is caused by particles hitting the walls of the container

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Section 7: Reviewing work
Children should learn:

how to make notes and summaries to clarify ideas
to summarise the particle theory in writing and drawing

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Sections in this unit

This unit is divided into sections. Each section contains a sequence of activities with related objectives and outcomes. You can view this unit by moving through the sections or print/download the whole unit.


	1. How can we explain evidence from experiments?
	2. How are theories created?
	3. What are the differences between solids, liquids and gases?
	4. How can the particle model explain the differences between solids, liquids and gases?
	5. a. How can the particle model explain other phenomena?
	6. b. How can the particle model explain other phenomena?
	7. Reviewing work