Curriculum
Science — Second Preparatory
Unit 1: Matter and Energy
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Unit 2: Matter and Chemical Reactions
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Unit 3: Energy Flow in Photosynthesis and Respiration
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Unit 4: Geological Processes
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Text lesson
States of Matter
States of Matter
Matter and its three states
Matter and its three states
- Matter is anything that has mass and occupies space.
- Matter exists in three main states: the solid state, the liquid state and the gas state.
- The difference between these states depends on three things: how the particles are arranged, how they move, and how strongly they attract each other.
- To explain the properties of matter we use the particle model.
- This model assumes that matter is made of very small particles (molecules, atoms or ions), that these particles are always moving, and that there are attractive forces between them whose strength depends on the state.
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