andrew.l's blog

I chose this topic because I found the subject of black holes intruiging. I found black holes interesting because they have been broken down so much, that that they have broken the barrier of mass. Also because blakc holes harness the power of time and space.

Pinhole Camer | Reflection

Thix experiment went fairly well. The construction of our camera took a very small amount of time, even though as one of the challenges we faced was the dissapearance of our first pinhole camera. This was no real problem in the experiment seeing as it took about 5 minutes to create a new camera. during our photo taking session it took a small amount of time and went well.

There about 30 species of backswimmers to date

They are like most other insects and have three stages in their life cycle: egg, larvae and adult.

Adult backswimmers have very big eyes, a curved back and long back legs. Their back legs have special hairs that help them swim. They range from 4 - 10 mm long.

Backswimmers live in ponds, lakes, billabongs and slow-running streams.

Adult and larval backswimmers eat smaller animals in the water including bloodworms and aquatic larvae. They also snatch invertebrates from the water's surface, drag them under and eat them.

Fish, turtles, water birds and lots of insects that live in the water like to eat backswimmers.

Adult backswimmers breathe by storing oxygen in a bubble on the underside of their abdomen. To get more air they come to the water's surface.

When backswimmers breed, males make sounds to attract females to mate with. The eggs are fertilised inside the female. After the eggs are fertilised the female lays the eggs in holes she drills in the stems of water plants.

Backswimmers get their name because they are great at backstroke. Using their legs they swim upside down at the surface of the water.