In this first video we have a good summary of the general properties of mass and volume and the specific property of density, which is derived from them.
Don’t worry too much about the numbers and the fractions, its easy to understand by the images alone. The formula is the one we learnd in class:
Density = Mass / Volume
In this second video you can revise what we learned about which objects sink or float. Objects with a density higher than water’s (1g/cm3) sink, and those with lower density float.
Fish can breathe in wáter, why? Let´s find it!
Birds are so diverse, and there are so many colours and shapes, it’s fun to learn about them!
Reptiles are vertebrate animals which are characterized by their special way of moving: Their name, in latin, means just that: reptar: to slither.
Today we’re going to look at a truly amazing group of vertebrates.
When they’re born they usually live in water… but when they grow up and become adults they spend most of their time on land. We present – the Amphibians!
The diversity of mammals is amazing. They can be as huge as whales, or as tiny as mice.
We’re going to look at vertebrate animals. All vertebrate animals have an internal skeleton made up of…
These videos are good complements to better understand Unit 2.