01 Feb Primary Science tuition – Matter
Primary Science tuition at Miracle Learning Centre is fun and informative. This primary science tuition lesson on matter which explain solid, liquid and gas.
There are three states of matter, mainly solid, liquid and gas. Solid has a definite shape and a definite volume. Let us take a table as an example. A table has a definite shape and a definite volume. We are not able to compress a table to make it become smaller or bigger.
Liquid has no definite shape but has definite volume. For example if you measure 50cm3 of water in a jug, then you pour the water into a cup, the volume of water will still be 50cm3. However, the shape has change as it has taken the shape of the cup. The water takes the shape of the container that is containing the water. Hence, a star shaped glass will enable the water to possess a star shape.
Gas has no definite volume and no definite shape. For example, we have gas in a syringe. If you try to press the plunger of the syringe, the plunger move slightly. This is because there are many spaces in between the particles and hence we are able to compress the gas. Hence, the volume also decreases. Therefore a gas has no definite shape and no definite volume. For example, when you blow air into a balloon, it expands. You are able to squeeze the balloon into different shapes if the balloon is not fully blown. This is when the balloon sculpturing is applicable. Balloon sculpturing allows the person to sculpture a balloon into the shape of a horse, a rabbit or any other animal.
The science tuition teacher explains that when the substance changes from solid to liquid, it is melting. When a substance changes from liquid to gas, it is boiling or evaporating. When a substance changes from gas to liquid, it condensing (condensation). When a substance changes from liquid to solid, it is freezing, When a substance changes from solid to gas, it is sublimation.
The temperature at which it changes from solid to liquid is called the melting point. The temperature at which it changes from liquid to gas is called the boiling point, the fixed temperature. The temperature at which it changes from liquid to solid is called the freezing point. Evaporation is not the same as boiling. The only similarity between boiling and evaporation is that it changes from liquid state to gaseous state. There are several difference between evaporation and boiling. Evaporation takes place at any temperature. Boiling takes place only at boiling point. Evaporation takes place on the surface of the liquid. Boiling takes place throughout the liquid. When boiling takes place, bubbles of gases are seen. When evaporation takes place, not bubbles are seen.
Chloe, a student from Miracle Learning Centre asked, “Why do we need to learn about states of matter?”
Mrs Lew, the science tuition teacher at Miracle Learning Centre replied, “By learning the states of matter, we know which substances are in which state. If we need to convert a substance from one state to another, we know whether we should supply heat or we should lose heat. In other to change from the solid state to the liquid state, we need to gain heat. To change from the liquid state to gaseous state, we need to gain heat as well. In order to convert from the gaseous state to the liquid state, and from the liquid state to the solid state, we need to lose heat. To describe evaporation, we need to explain that water gains heat and hence evaporate to become water vapour. During condensation, water vapour loses heat and condenses on a cool surface to become water droplets. Join us now. Call 6463 8756 now! www.miraclelearningcentre.com
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