project and experiment reflection

June 28, 2017 - Uncategorized

heidi and i did very well on our shield shrimp project. i think both of us learnt a lot about shield shrimps and how do do an info text. some thing i learnt was 1 they have shields to protect them. 2 they have 3 eyes and they live in drying up lakes, dams and little pools.

In this experiment I found that the green sponge went the furthest because it was not heavy so that means it was light so it can move with the wind or in this case the wind from the fan. We did this experiment to show that shield shrimp eggs can dry up and move with the wind. Now that is amassing.

Jack- I predict that the shield is so they can protect themselves from predators.
Heidi-I predict that a shield shrimp’s colour may help them survive because it would camouflage in the sand. I also predict that these shrimps have shields to protect themselves from their predators.

Shield Shrimps are the most strange looking and distinctive of all desert crustaceans, and are found over much of inland Australia. They are extremely uncommon, with only two species of this animal so far. Scientists are still trying to discover more species, but have so far been unsuccessful.
Shield shrimps have been around for 350 million years, humans have only discovered them this century.

Shield shrimps shield is very helpful to help them defend themselves from predators, helping them from predators with getting hit or attacked and can sometimes help them disguise as a rock or an other small round hard object. They can survive in dry conditions but their predators cannot, so basically while the shield shrimps are hiding for years, their predators can’t survive for more than a few months without water. This is a smart way to lose off predators. They have a tail and feet that help them swim much faster in shallow lakes, ponds and damns they propel through the water and use their tail almost like flippers.

Within weeks, shield shrimp babies can transform into adults. Shield shrimps move in small groups usually containing their family or shrimps around the same age. These groups are very small, including around 3 – 6 shrimps per group.

They are shaped like a tadpole, their shield is wide fat and oval shaped and a scaled tail.
The “shield” is a body part that protects the head and front part of their body from rocks, dust, and sometimes are used to hide away from predators.
Their colour is normally olive green to brown. Adult shrimps reach about 90 mm in body length while their children reach up to about 5 cm in body length.

Shrimps are defenceless so they usually hide in waterholes that are dying out. These environments are dry and harsh, and shield shrimps are one of the few that can survive for years in these hard environments. Unlike other shrimps, these creatures can sense following rain, advantaging all of the other animals that might be around their group. They are a freshwater species and are found in rock pools and Isolated places.

Arid- dry, with a lack of water. Most often used describing hot or desert environments.
Gill- a lung to help them breath. Most marine animals have these body parts.
Crustacean- a group of animals like mammals or reptiles. They most often have a shell. An example of a crustacean is a crab or lobster.
Isolated- an empty environment, far away from other populated places, or animals.
Predators: animals that normally hunt smaller or less powerful animals to eat them as prey.
Prey: predators eat prey to survive and keep their kids/ babies alive.


Predictions –
Jack- I predict that the dry sponge will travel further.
Heidi- I predict that the wet sponge will travel slower and less far.

The wet sponge moved 0.1 cm the first time, while the dry sponge moved 92.4 cm. This experiment got similar results each time we did it. The wet sponge stuck to the table and the dry sponge moved to the end of the table.
This experiment was representing the shield shrimp’s eggs and how the are light and dry so the wind blows the eggs to a spot where it is raining, in order for them to hatch.

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