Effects of Combustion

Science

During the lesson of science with Mrs Kuruvilla , I have learnt about the structure of volcanoes and why they erupt. I’ve also learnt about earthquakes and what causes it to happen. I have been refreshed with the water cycle and all the layers inside earth as well as facts related to it. I’ve also gotten a little idea of how to calculate speed but I’m not fully confident in how to do it. So in the past weeks I've been to science, this i what I've learnt.

Chemical and Physical changes

What are Chemical changes ?

Chemical changes is a type of reaction that can’t be put back together, it’s irreversible. It’s when separating 1 molecule into 2 so it can join with another to make something new .

Facts about Chemical changes

• Some chemical reactions produce energy while some of them collect energy
• There are different types of chemical reactions like combustion and so on .
• Chemical changes happen everyday

Example : The bowl of cake mixture can be made into a fully baked cake but it can’t turn back into the mixture.

What are Physical changes?

Physical change is when you break or damage something but can easily be put back together.

Facts about Physical changes:

・Most physical changes can be reversed, chemical changes cannot.

・A physical change is different from a chemical change.

Example: If you ice water then it will turn into ice and if you melt it , it will turn into

water.