Arxiu per etiquetes: science
Solar System: interesting facts
The Earth film
Check this film trailer. Guess the continents and oceans you can see!
Seven continents of the world rap
Images of the continents of the world
LET’S MAKE A COMPASS
Icky insects song
4th-Machines: making a catapult
5th-Science experiment: egg + vinegar
What happen if you soak an egg in vinegar? 5th graders made hypothesis and waited for a week to know the answer. Here you can watch some photos and videos about this science experiment.
EGGS contain something called “calcium carbonate”. This is what makes them hard.
VINEGAR is an acid known as acetic acid.
The acids in the vinegar destroyed the calcium in the eggshell.
When you take the egg out of the vinegar it’s soft!!!
What makes our BONES hard? That’s right! Calcium carbonate — the same thing that made
the egg shells hard. Take some thin chicken bones and drop them in vinegar for a day.
Take them out and they’ll be soft just like the egg shells were. Now you can tie them in a knot, just like a piece of string.
What about our TEETH? You’re right again! This is why it is important to brush our teeth twice a day and visit the dentist.
5th-Science experiment: Chromatography
5th graders are doing experiments in Science class. Watch this video about chromatography (a technique used to separate mixtures). We used felt tips and markers and also spinach leaves to separate the colours. You can try it in your house.