How can we use the knowledge of contraction and expansion of metals for making tools? Explain with a help of an example.
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As materials warm up, the particle model of matter says that their particles move faster and spread apart. We expect substances to expand (increase in volume) as their temperature rises. Falling temperature means that average particle motion is slowing down. It seems logical to expect substances to contract (decrease in volume) as they cool.
You can check those predictions by observing the behaviour of common pure substances. A pure substance is a type of matter that is made of only one kind of particle. On Earth, a pure substance may exist as a solid, liquid, or gas. These are the three states or phases of matter. Gold, oxygen, and water are examples of pure substances. Examine the illustrations to review the key characteristics of each state.
You can check those predictions by observing the behaviour of common pure substances. A pure substance is a type of matter that is made of only one kind of particle. On Earth, a pure substance may exist as a solid, liquid, or gas. These are the three states or phases of matter. Gold, oxygen, and water are examples of pure substances. Examine the illustrations to review the key characteristics of each state.
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<❤> Here is your answer: <❤>
>>Substances expand (increase in size) when they get warmer, and they contract (decrease in size) when they get cooler. This property can be useful. For example: Thermometers work because the liquid inside them expands and rises up the tube when it gets hotter.
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