Social Studies - What Have I Learnt

What did the video encourage us to think about? 

That we have to protect our oceans and actually protect our sea life. 

That we have to try and help clean up rubbish so it doesn’t end up in our oceans. Everyday minutes more rubbish goes into our oceans and it's killing our whales, dolphins, turtles etc. When our whales reach the surface of the water for air they release these particles called phytoplankton and it releases oxygen for us to breathe. 85% of our oxygen comes from whales and if they die then our ocean dies then so do we. So much sea life gets washed up on our beaches because of how much plastic they are filled up with. 

What do you think about this?

That this is a huge problem and our generation needs to do something about it. Some of my own thinking is that we need to start putting rubbish in the correct bins, making sure it doesn’t get dropped or fly out of the bin. 

What is something that you could do to reduce pollution?

Put rubbish in the correct bins, don’t drop rubbish on the ground,  

Testing For Hydrogen Gas

Testing for Hydrogen Gas 

Aim: To show that hydrogen gas is produced when a metal reacts with acid.

Method: 

1. Add your sample of metal to your test tube. Add 2ml of acid.

2. Carefully invert the boiling tube above the test tube containing the metal and acid.

3. Hold the test tubes together for a few minutes, allowing time for the inverted boiling tube to fill with gas.

4. When you think the tube is full, Mr Heath should light the wooden splint.

5. Carefully, but quickly, tilt the boiling tube full of gas upwards and insert the burning splint into the mouth of the test tube.

Results:

It made a popping sound.

Discussion: 

When the reactants (Metal + Acid) mixed together it resulted in two products (Metal Salt + Hydrogen). Because we trapped the Hydrogen gas into the test tubes it started to heat up and bubble. Because of this we knew that it was ready to have the splint put into it. When the splint was put in the test tube it reacted with the Hydrogen gas resulting in the popping sound.

Conclusion:

The experiment worked because the end result was a popping sound. I wouldn't change anything.