Observation tasks:

Then we put an animal into a petri dish or into an other little vessel.

1.Describe the animal in words:

tiny ,looks like shrimps, has many feet, invertebrate

2.Describe the locomotion of the animal:

The hindfoots are used more actively.

The animal moves sideways along.

At crawfishes: Now put an sheet of a tree from the vessel to the animals.

3.The changing of the behaviour :

The animal look for a cover under or over the leaves..

4.Conclusion of our observation:

The animals are shady.

At crawfishes: Take out the sheet of a tree and put the animal back into the vessel.

Determine the temperature preference

Now we fill a petri dish with hot water (approximately 60°C) and the other petri dish with a common salt/ ice compound. Then we put the one end of the groove on the petri dish with the hot water and the other end on the petri dish with the salt/ice compound.

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Now we measure the temperature of the water with a thermometer or a pyrometer between the lines.

You can also fix two slots into the thick boards of Styrofoam in a distance, which fits to the length of the sheet metal. There you can fill in hot water respectively the salt/ice compound and put the sheet metal on it, so that the one end is cooled and the other is heated.

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