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Science Investigation

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by

Elizabeth Harris

on 16 September 2016

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Transcript of Science Investigation

Science Experiment
By Sophie G, Akaisha and Hamish
Aim
Our aim is to observe the changes to a solid when it is left in a liquid for a period of time.
Hypothesis
The colour of the solids will soak into the water.
If the solid is left in the water it might dissolve.
The solids might stick together
If the solid is left in the water the solid might turn white.
Design a Fair Test
What to change
(Independent variable)

Temperature of water
The amount of solids in each bowl
What to measure
(dependent variable)
Water- 100ml in each bowl
The size of the solid
The amount of solids in each bowl
temperature of water
What to keep the same
(controlled variable)
Where the cup is placed
The size of the cups
The time limit for each bowl
Amount of water in each bowl
Steps
1. Place 100ml of cold water and two jellybeans into the first bowl. (leave all four bowls for 10 minutes each)
2. Place 100ml of hot water and two jellybeans into the second bowl.
3. Next, place 100ml of room temperature water and to jellybeans into the third bowl.
4. place 4 jellybeans and 100ml of hot water into the fourth and final; bowl.
5. when all the bowls have sit for 10 minutes, see what your results are and what the jellybeans look like after being in water for a period of time.
MATERIALS AND EQUIPMENT
Water- About 450mL in total- 100mL of room temperature, 100mL of cold water and 200mL of hot water.
A measuring cup- A measuring cup that can fit more than 100mL of water.
A packet of Allen's jellybeans
5 or 6 plastic bowls
Paper towels
What did I find out?
I found out that if you put jelly beans into water they become sticky and they lose their colour. The hot water made the jellybeans warm/hot, squishy, they had no colour and the water had changed colour. The cold water made the jelly beans squishy, hard and half transparent, but the room temperature water made the jellybeans hard, they had colour spots and they were a little bit transparent.
Is the change chemical or physical?
Our aim is to observe the changes to a solid if it is left in a liquid for a period of time. We put two jellybeans in a bowl with either room temperature water, cold water, or hot water. Then we put 4 jellybeans in a bowl with another set of hot water. The investigation shows that when you add jellybeans to water, they lose their colour and become sticky. Once we had immersed the jellybeans into the water, we took them out again after 10 minutes. By the time we had taken the jellybeans out of the water, they had lost their colour and become sticky. That is why I know that our experiment has a chemical change in it.
What actions caused these changes?
The actions to cause these changes were all related to the temperature of the water. For example, the hot water made the sugar around the jellybeans dissolve so only the gum of the jellybean was left in the water. For 3 of our bowls we used two jellybeans, but for one of the bowls we used 4 jellybeans. Our experiment is irreversible.
Difficulties/ What could we improve?
One of our difficulties were that we didn't have any paper towels so when we were writing notes, the sticky jellybeans got all over our books. We could of improved on the fact that we only used one solid for our whole experiment, and that we could of left the jellybeans in the water for longer so we could of had better results.
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