Science experiments!

Year 6 have been busy in Science! We have started to investigate the, ‘states of matter’, looking at the fundamental differences between solids, liquids and gas. We started by looking at the theory behind the structure of solids and liquids, and the definitions of key terms such as ‘density’ and ‘particles’.

For our first experiment, we looked at the impact of mixing a solid (baking soda) with a liquid (vinegar). We found that it caused a chemical reaction, releasing a gas (carbon dioxide), which we collected in a balloon. The children were really perceptive and also observed how the temperature of the bottle also changed, and that there was a foul smell arising as well. Some excellent scientific observations! We ended the lesson with a bit of fun – what would happen if we added MORE baking soda for example? The result… a lot of mess!!


The following week, we really focused on density. After discussing how to make a liquid more or less dense, we designed our experiment. To begin with, we collected different beakers of water, and mixed different food colouring into them (so we could determine which beaker was which). We then mixed increasing levels of sugar into the water, which made the liquids more or less dense.

After this, we carefully put the liquids into a beaker, and observed….


Our results were really creative! We could see how the dense liquids sunk to the bottom, and how the less dense liquids rose to the top, creating distinct layers. Very pretty!

Next week, the children will design and conduct their own experiment, investigating the density of common household liquids, such as washing up liquid and cooking oil. Watch this space….!