For our next science activity we are going to be experimenting with M and M's!
We will be releasing this activity on the Surrey Libraries Facebook page on Thursday 15th April at 4:30pm.
We can make butter from cream. When we do this the fat in the cream separates, and produces butter and buttermilk.
To make your butter the first thing that you will need to do is half fill your jar with cream and then put the lid back on the jar. Make sure that the lid has been put tightly onto the jar. You may like an adult to check this for you.
The next thing that you will need to do is shake your jar. You will need to shake your jar for a few minutes. To start with the cream will start to thicken.
If you keep shaking a ball of butter will start to form in the middle of the jar. The liquid that surrounds it is buttermilk.
The reason this happens is because cream contains small amounts of fat cells. These cells stop the fat from forming clumps as they are separated by cell membranes. When we shake the cream the fat cells bump into each other, the membranes burst and the fat starts to clump together forming the butter.
The video tutorial for this activity is available on the Surrey Libraries Facebook Page.
For our next science activity we are going to be making butter!
Egg shells are fragile. As we learned in last weeks activity they are made from calcium carbonate. If eggs are dropped they can easily break.
You are going to be designing a container for an egg so that it can be dropped without breaking. To do this you will need to think about GRAVITY. Gravity is an invisible force that holds things to the surface of the Earth. Because of gravity your egg will fall downwards. Is there any way that you can slow the fall or will you find a way to protect the egg when it reaches the ground?
You will want to think about what materials you are going to use. What materials do you think would best protect your egg when you drop it?
Here is one design that I have made
When you test your designs you will want to do this outside.
If your design is not successful can you think of some improvements? If your design is successful do you think it will work at a higher or lower height? Can you think of another design that might work?
The video tutorial for this activity is available on the Surrey Libraries Facebook Page
For our next science activity we are going to be designing a container for an uncooked egg so that it can be dropped without breaking!
The shell of an egg is made from calcium carbonate. This reacts with vinegar, which is an acid, in a similar way to bicarbonate of soda, that we have seen in other experiments, like making volcanoes or bath bombs. Look at the Natural Indicator activity to learn more about acids
The first thing that you need to do is put your egg in your glass or container. You may need to use a spoon to help you with this.
You now want to cover it with vinegar. You will see that a reaction starts to happen as soon as you start to add the vinegar. You will see bubbles start to form on the surface of the egg. These are bubbles of carbon dioxide.
You will want to leave your egg in the vinegar for a few days. You will see that the shell of the egg becomes completely dissolved.
The vinegar reacts with the calcium carbonate in the egg shell, producing carbon dioxide bubbles and dissolving the shell. Once the shell has gone, the outer membrane becomes tougher as the vinegar moves into the egg by osmosis, pickling the egg and hardening it. This gives the egg its rubber texture and allows you to bounce or roll it, without breaking it.
The video tutorial for this activity is available on the Surrey Libraries Facebook Page or YouTube Channel
In this activity we are going to be making a paper aeroplane, a glider and a helicopter and comparing how they fly For this activity you w...
