Sunday, 14 February 2016
Monday, 16 November 2015
Sunday, 8 November 2015
Thursday, 13 August 2015
Wednesday, 29 July 2015
Tuesday, 23 June 2015
Compare and contrasting
Water boatman & Smelt
The water boatman is a tiny invertebrate that lives in a freshwater habitat. A water boatmen has stripes that run along its oval shaped body. The water boatman had 6 legs and it has 3 body parts which are the head,thorax and abdomen. The water boatmen uses bubbles to breath under water. The water boatman's threats are loss of habitat due to pollution.
In contrast the smelt, another freshwater species, Is the smallest fish in the world and it has scales along its thin body. The smelt also has four shiny little fins. Unlike the water boatman's breathing technique the smelt needs gills to breathe in water . The smelts threats are similar to the waterboatman because it is also threatened by loss of habitat due to pollution, but the smelt have another different threat which is people fishing for them, even though smelt are hard to catch.
It is unusual that the smelt is also threatened by the water boatman because they can eat and the Whitebait, which is a baby smelt, but when the smelt is an adult they are predators of waterboatman.
By Bronte and John
Tuesday, 26 May 2015
Water monitoring process
First we filled a little jar with fresh river water.Then We checked the PH of the water to see if the water was healthy. We checked the pH with this yellow strip of paper which was called indicator paper. You dip the the paper into the water and wait to till it has changed colour then take it out and see if it is healthy water. We check the PH because if the water is too acidic it is bad for the living things in it.
Secondly we had to check the temperature of the water with a thermometer we did that by sticking the thermometer in the water and waiting till the red line has reached a number then you take it out.
We had to check the turbidity .We checked the turbidity with a journal which had 4 numbers 9,14,24,40, the numbers we can see through the water will depend on how clear or cloudy the water is. We did this because if the water is cloudy it means that there must be sand or dirt it the water. This can affect the living things which we need to have in the water to keep the water healthy.
Fourthly we check the water to see if it smelled funny. We did this because it is important to make sure that the water doesn't smell funny because if it does there must be something harmful in the water polluted it.
Overall, we discovered that most of the time are water was healthy and I also learnt that it is important to look after water, and I also learnt how careful you should be with water.