Fresh eggs sink, and older eggs float. Eggs have air cell that becomes bigger as they age. Once the air pocket is big enough to make the egg less dense than water, the egg floats!! Another way to make an egg float is to increase the density of the water the egg is in! Once…
Eggs with no shells are definitely one of the things my children find most intriguing. I’ve made bouncy eggs for nursery children to look at and for secondary school children to use as part of an osmosis experiment. This fun bouncy egg experiment is great fun for kids of all ages and fascinating for adults…
This egg experiment shows that something we might think of as brittle and weak can actually support a heavy load under certain conditions. We’re going to investigate how strong an eggshell is by using half-shells to make a bridge. How strong is an eggshell? You’ll need How to make an eggshell bridge Method 1 Method 2…
This collection of Humpty Dumpty science experiments is perfect for Early Years Science to fit in with a Nursery Rhyme theme. Older children could use it for practising designing an experiment following correct scientific procedures. I’ve used plastic sealable bags to keep the mess contained, but children could also wrap the egg in protective materials…
Alice’s Adventures in Wonderland is one of my favourite books, so I’m very excited about a new mini series of Alice themed science experiments and activities. My first activity is super simple. All you need is a pen, paper and a mirror! Alice encounters many strange things in Wonderland, including reversed time and a backwards…
When we talk about bacteria and viruses making us ill, we might also hear them referred to as pathogens. A pathogen is a general term for any microorganism that can cause disease. This post looks at how bacteria are different from viruses and includes a comparison table of viruses and bacteria. What is a pathogen? Bacteria, viruses, protists and fungi can all be pathogens. Differences between…
This activity uses a bit of science trickery to make an object that sinks in water, float in water. Why do things float in water? Objects are made up of very tiny molecules. Molecules can be packed in close together like in a rock or more spread out like in bubble wrap. The positioning of…
There are three main types of rocks: sedimentary, metamorphic and igneous. Each are formed in a different ways. Sedimentary rocks contain rounded grains in layers. Chalk, shale and limestone are examples of sedimentary rocks. This activity is a very simple demonstration of how how sedimentary rocks are formed. Sedimentary rocks are formed when layers of…
Vaccines are a way to prevent disease. Vaccines introduce an inactive or altered form of a pathogen into the body. The altered pathogen contains the same antigen ( protein on the surface ) as the real disease causing agent. White blood cells produce antibodies specific to the antigen in the vaccine. If a vaccinated person…
Do you know how salt melts snow? Grit is often sprayed on roads to stop cars from skidding on very cold days. What we call grit is a mixture of salt, gravel and stone. When snow falls on a road with grit applied, it mixes with the salt, lowering the snow’s freezing point and stopping…
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