We looked at which substances will dissolve in water.
First, we talked about the word dissolve and what it means. We decided that something dissolves if it disappears into the water when you stir it, even if it changes the colour of the water. Something that doesn’t dissolve will settle on the bottom after a while.
We also talked about making predictions. We learned that a prediction is a guess; what we think will happen. The first substance we tried was mixed herbs. We predicted that it wouldn’t dissolve in water. We were right! The herbs just swirled around but they didn’t disappear.
We then worked with a buddy and experimented with sand, flour, sugar and salt. First we made our prediction - Will it dissolve? Then we carried out the experiment to see if we were right.
Zoe makes her prediction.
Lachlan makes his prediction.
We filled our cups to the halfway mark and then used a teaspoon to add the substance and give it a stir. The trickiest part was remembering to predict what would happen before the experiment. It was so exciting!
What do you think happened to the salt?
Dali is experimenting with flour to see if it will dissolve.
Did the sand dissolve in water, Lachlan?
We had to be careful not to put too much flour in!
Sienna is experimenting with flour to see if it will dissolve.
We wrote up our findings and tried to use scientific language such as prediction, experiment and dissolve.
The sugar is dissolving into the water and the flour is dissolving into the water. - Lachlan
I thought the salt wouldn’t dissolve and it did. - Caleb K
My favourite part was tipping the water out. - Dali
I liked stirring the flour because the water turned white. It dissolved. - Zoe