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They do not change shape on their own. | |  |\n| Liquid | In a liquid, particles have some space to move around. They can change their shape, but take up the same amount of space. | |  |\n| Gas | The particles in a gas are spread out and they move around a lot. Gases fill the space they are in. | |  |\n\n\n| Being a Scientist |  |  |\n| --- | --- | --- |\n| We can explore the properties of gases by accurately weighing fizzy drinks to see what happens when the bubbles are released. | | We can carry out a fair test by making sure we only change one variable in our investigation. |\n\n\n| Key Vocabulary |  | 􀀳 |\n| --- | --- | --- |\n| freezing | When a liquid turns into a solid. For example water turns into ice. |  |\n| melting | When a solid becomes a liquid. This happens to chocolate at room temperature. |  |\n| evaporation | When a liquid becomes a gas. For example water turning into steam. |  |\n| condensation | When gases turn into liquids. We see this when clouds form. |  |\n| fair test | This is when only one variable is changed in an experiment. |  |\n| variable | A variable is something that could be changed inan investigation. |  |\n\nThe Water Cycle 􀀳  \nThe water cycle shows how water moves around our planet and atmosphere.  \nIt is a continuous cycle.  \nWater evaporates from the sea and condenses into clouds.  \nThen it falls back to the ground as rain or snow – this is called precipitation.  \nIt moves through rivers and underground to get back to thesea.  \nMaterials can be changed when they are heated or cooled:  \nAt low temperatures, liquids can freeze into solids.  \nSolids can melt  \ninto liquids at high  \ntemperatures.  \nLiquids can evaporate into gases faster at higher temperatures.","cbCaibXG9mDSRHxV","https://ap.wps.com/l/cbCaibXG9mDSRHxV","pdf",317427,"English","# Solids, Liquids and Gases\n# Being a Scientist\n# Key Vocabulary\n# The Water Cycle","[{\"question\":\"What is the difference between solids, liquids, and gases regarding particle movement?\",\"answer\":\"In solids, particles are close together and vibrate in place; in liquids, they have space to move around; and in gases, they are spread out and move freely.\"},{\"question\":\"What is a 'fair test' in scientific investigations?\",\"answer\":\"A fair test is an experimental procedure where only one variable is changed at a time, ensuring that the results are due to that single change.\"},{\"question\":\"How does the water cycle function?\",\"answer\":\"The water cycle is a continuous process where water evaporates from the sea, condenses to form clouds, falls to the ground as precipitation, and flows through rivers and underground back to the sea.\"}]","Solids, Liquids and Gases - Year 4 Science - Autumn Term | PDF",1790884679]