115 Material World – Chemical Change

Artefact and learning description for Chemical Change

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Youtube Video –> http://www.youtube.com/watch?v=0o4b-znF0Sg&feature=youtu.be

Today, I had some chemical and physical change activities. Friends and I had ‘Chemical Popguns’ activity. For this activity, we needed a plastic soft-drink bottle, a cork, vinegar and sodium bicarbonate. Firstly, we pour vinegar into the bottle until it’s one-third full and we gathered two teaspoons of sodium bicarbonate on the paper. Vivien quickly push the cork into the bottle straight after added sodium bicarbonate. What happened? The cork exploded from the bottle and lot of foam flowed out.

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The second activity was ‘Baking Pikelets’. We actually cooked during the lesson and it was a fabulous chemical experiment. Firstly, we mixed with egg, sugar, flour, baking powder and salt, and added milk to form a smooth and thick batter. We heated a frying pan before pour batter on it and we waited until bubbles appear on the surface of each pikelet. When we heated the batter, it was no longer liquid.

Half page reflection for Chemical Change

Matters can change in two ways, which are physical change and chemical change. Teaching children about the chemical and physical changes are considered important, as these are such a relevant part of teaching science in early childhood education. Children would meet changes quite often in their world as soon as they grow up. Actually I was shocked by the fact that the cooking can be the science. During the science lesson, I made pikelets and I saw the process of chemical change, the batters changed into solid, pikelets as I heated and I learnt that this was chemical change, as the change cannot be reversed. However, physical change is usually easy to reverse. For example, melting an ice cube or breaking a bottle is the example of physical change. Teaching chemical and physical change would be exciting as there are variety activities for young children and I am sure that these activities are stimulate children’s curiosity and interest. Teaching this topic to young children would be interesting, and I am excited to give children the chance to explore chemical change and help them learn to understand it. Learning about chemical change can also be made fun and curiosity, getting children involved in activities

Resource for Chemical Change and reason chosen

http://notjustcute.com/2010/06/22/reactions-five-fun-science-activities-that-fizz-foam-and-pop/

In this activity, children place a small amount of baking soda in the balloon and attach the balloon to a small-mouthed bottle with vinegar inside. Lift the balloon up to allow the baking soda to drop into the bottle. “BOOM” The reaction would occur. Through this activity, children were then given the opportunity to explore the knowledge of chemical change. I choose this activity to teach chemical change to young children because the reaction from this activity could provide the concept of chemical change to children. They would be amazed when the balloon was inflated and they would ask what happen, why and how. Through these learning process, children would able to develop their understanding of chemical change.

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115 Material World – States of Matter

Artefact and learning description for States of Matter

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When I entered the science workshop last week, I was surprised that lots of activity tables were prepared for us. Every activity was fabulous but the ‘Oobleck’ activity made me interesting. It was made of cornstarch and water, and it is a type of non-Newtonian fluid called a dilatant according to Wikipedia. When I touched oobleck that was in a basket, it was like the harden clay but when I put on my hand, It changed into the liquid and ooze out of my hand. Also, when I force it, it acted like a solid.

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Youtube Video –> http://www.youtube.com/watch?v=JFLfO7XhSqk&feature=youtu.be

The second activity was ‘Hovercraft’. This activity was needed a CD that glued with a push-up water bottle top and a balloon. I inflated the balloon and fix it over the valve in the middle of the CD and then placed the hovercraft on the table. When I pulled the bottle valve to the open position, it moved softly but quickly on the table like a spacecraft! I realised that this was because the air in the balloon.

Half-page reflection on States of Matter

Through these activities, I seem to become close with the States of Matter more. In the first activity, I was amazing at oobleck that can be changed to the solid when it was forced and the liquid when it was on my hand. This process is only applied to non-Newtonian fluid, which is what I learnt through this activity. During this activity I thought that Oobleck would be a perfect science experiment for children, because children are usually visually stimulated, excited and interested so they can easily learn the states of matter through Intriguing activity, ‘Oobleck’. Children would realise textures and features of solid and liquid through this activity. If the first activity only talked about solid and liquid, the second activity will talk about gas. Children do not feel an interest in the gas because the gas is invisible. However, if the air were ‘visible’, children would wonder about the air. Therefore the Hovercraft would be an excellent activity for children. I was very impressive that CD hovercraft moved like a spacecraft, and I learnt that this is because of the air in the balloon. As air flew downward and out of the balloon, it built up air pressure under the CD. That air pressure lifted the whole hovercraft off the table as air began to escape evenly all around the edge of the plate. When children do this activity, I could explain that the air is exist even it is invisible through the balloon. They would be amazed about moving Hovercraft and they would show interests on the gas then, they are in process of learning of states of matter.

Resource for States of Matter, and reason chosen

http://www.frugalteacher.com/2011/09/life-cycle-of-snowman.html

I would like to use this activity to teach states of Matter to young children because three states are clearly shown on the activity and I personally think that the ice is the best resource for children to learn the states of matter. Children would be amazed at the ice in the balloon and would show curiosity about what happened. Also, children will be able to watch melting process through the ice snowman, so far children are learnt melting and solidification. Lastly, when the ice is “cooked”, it changes to gas. Through this activity, children would realise that the temperature change for each process and able to develop their understanding of solid, liquid and gas.