Tsunami

We have been learning about chaotic events. We have been doing tsunamis. In 1958 there was a tsunami in alaska, it was 530 metres high. So I made a graph showing how tall the water was. 

Hope you enjoy

Dilution Experiment.

In class on monday, we did an experiment using water and potassium permanganate. 

Aim- To make a dilution series to investigate concentration.

Equipment- A potassium permanganate crystal, six large test tubes, tweezers, a plastic transfer pipette, a test tube rack, 10 mL measuring cylinder.

Method- 

1: place the six test tubes in a test tube rack. label the rack with numbers 1-6.

2: Using the measuring cylinder, filln test tube 1 with 10 mL of water. Fill the remaining test tube with 5 mL of water.

3: Using your tweezers, add a single crystal of potassium permanganate to test tube 1.

4: Gently shake the test tube until the crystal has dissolved.

5:Using the transfer pipette, carefully remove exactly 5 mL from test tube 1 and pour it into test tube 2.

6: Rinse the transfer pipette thoroughly to ensure that no purple solution remains. 

7: Gently shake test tube 2 and repeat the transfer process, transfering exactly 5 mL of solution from test tube 2 to test tube 3.

8:Rinse the pipette again and repeat the transfer process for test tubes 4, 5 and 6.

Results-

Conclusion/ discussion-  

I saw that the colour of the liquid changed everytime we added the potassium permanganate. test tube number 1 is most concentrated than test tube number 6, so that's why number 6 is more lighter.

Filtration Experiment

Today in hurumanu 3, we were doing chemistry we did a filtration experiment.

Aim: To separate a solution from a precipitate ( precipitate is the name for a solid that forms in a liquid during a chemical reaction).

Hypothesis:I think everything is going to go through the filter.

Method: 

1. Pour approximately 50mL of copper sulfate solution into a beaker.

2. Add the same volume of sodium carbonate solution. A reaction will happen, you should see a cloudy blue precipitate form. Called copper carbonate. 

3. Watch demo then fold filter paper to fit inside the funnel

4. Place the funnel with the filter paper inside of it, into the mouth of a conical flask. 

5. Stir the mixture in the beaker, then carefully pour it into the funnel. 

6. Observe what happened.

Observations: After we put it in the funnel, it went through and turned clear. 

 

Health- Relationships

In class we have been talking about relationships. We were talking about " Online relationships are not as important as real life relationships." We had to write a paragraph on what we think of this statement. Here is mine...

Some people may think online relationships are not as important as real life relationships. I honestly think they are the same, you just don't see them. I think that if you like them then you should still talk to them even if it is online. You should make sure they are who they say they are though, but if you trust them then its a healthy relationship. On the other hand, some people think there not as important as real life relationships, which is fine everyone has there own opinion. In conclusion, I think they are both important. 

Sustainability

In Sewing we had to find things we could make over the next few weeks. Here are my ideas....


Memory box- Paint the outside of the box. Then use scrap material to write something on top. 

Mat- Use wool to make pompoms, then put all the pompoms together to make a mat.

Hauora Assessment

Roturua lakes

Rotorua lakes:

The water in the Rotorua lakes has been getting worse over the past few decades due to nutrients causing higher phosphorus levels and algal blooms. The land around the lake has been farmed since the time of the European settlers which caused the nutrients to seep into the lakes because of their farming. Much of the water has deteriorated since then it has become toxic.

Back in 1990 EnvBOP started a program to routinely monitor the lakes. Then by 2006, widespread concern led to an investigation by the New Zealand Parliamentary Commissioner for the Environment. The results of this investigation convinced the  New Zealand Government to pay $72m towards $144m to help to improve the damage that has been done to these lakes. Also during 2006 the Government of New Zealand signed an agreement with the Te Arawa Moari Trust Board for the local Maori people to take over ownership of the Rotorua lake beds but EnvBOP will keep their managerial position. 

If we don’t clean the lakes out now it then will become a bigger problem for our future generations to deal with. It could cause problems to the native plants, wildlife and ecosystems around the lakes.