Crabby Crabs

Thursday (02/04/2009)

a) Crabby Crabs
Our class and 5-year-old gathered to see the two crabs which just died in the afternoon.
Teacher Huang brought the female crab. The kids recalled the facts about crabs while listening to Teacher Huang’s explanation.
They saw that when a crab is dissected, both left and right are similar. This is a symmetrical animal.
It was very smelly and the kids kept saying it. Why? Firstly, one should not eat a dead crab as it is poisonous. Secondly, a lived crab eat almost anything it can find. It likes eating dead animals too.

b)Facts: Crab
It has a shell and has 10 legs. 2 of which are swimming legs, 6 are walking legs whereas the 2 front legs are the claws. They are use to clam food as well as protection. Males use them to fight with other males to attract the females.
When crabs grow, they will molt. During this time, they will hide between rocks or anywhere safe as their body is very soft. They need to drink lots of water to restore the shell. Usually after 2 hours of drinking water, their shells will be more firmed.
They molt about 5 times a year.
A female adult can lay up to hundreds of eggs. After delivering the eggs, she would die in about 2 weeks.

c) Craft
They each trace their left and right hand. They learnt to trace for their friends when they couldn’t do so.
Then, they cut the pieces and attached them together. They learnt to write the word “crab” on the paper crab.