Jamie

Jamie

Sandaig Primary 7 S

Sandaig Primary 7 S

14 09 07 14:49The Bridge

Today we went to the bridge with St Stephens School again. This time we were doing drama and singing. I was in the drama group and so were half of St Stephens. For the drama we started with a couple of games and then we had to make groups and a shape to go along with it but it did not work out and we got put into groups and we just made shapes. When the ones who were up singing came down we played a game called “In the swamp and on the banks”.

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04 09 07 14:49Spiders

When a spider spins its web, it will then wait on it and when prey comes near it become trapped. The spider can sense the impact and struggle of a prey animal by vibrations transmitted along the web lines. Other species of spiders do not use webs for capturing prey directly; instead pouncing from concealment e.g. trapdoor spiders or running them down in open chase e.g. wolf spiders. The net-casting spider balances the two methods of running and web-spinning in its feeding habits. This spider weaves a small net which it attaches to its front legs. It then lurks in wait for potential prey and, when such prey arrives, lunges forward to wrap its victim in the net, bite and paralyze it. Hence, this spider expends less energy catching prey than a primitive hunter such as the Wolf spider. It also avoids the energy cost of weaving a large orb-web. The diving bell spider does not use its web directly in prey capture, but has modified it into an underwater diving bell. Even species whose ancestors were building spiral orb webs have given rise to spiders that no longer make webs, for instance some Hawaiian spiny-legged spiders which have abandoned web construction entirely. Some spiders manage to use the 'signalling snare' technique of a web without spinning a web at all. Several types of water-dwelling spiders will rest their feet on the water's surface in much the same manner as an orb-web user. When an insect falls onto the water and is ensnared by surface tension, the spider can detect the vibrations and run out to capture the prey. I got the picture from wikipedia.

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