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Science Vocab
chapter 2 lesson 3 and scientific method
| Term | Definition |
|---|---|
| flatworm | a worm with a flattened body and one body opening |
| roundworm | a worm that has a round body and two body openings |
| segmented worms | a worm that has a body that is divided into sections |
| scavengers | animals that feeds on dead and decaying things |
| worms | an invertebrate split into 3 groups |
| planaria | ex. of a scavenger flatworm |
| parasite | a living thing that lives on another living thing and harms the living thing which it feeds |
| tapeworm | ex. of a parasitic flatworm |
| hookworm | ex. of a parasitic roundworm |
| leech | ex. of a parasitic segmented worm |
| earthworm | ex. of a scavenger segmented worm |
| coelum | protects internal organs of a segmented worm |
| setae | extra little hairs on segmented worms |
| problem | a question or problem you can research and test |
| research | background info about a scientific problem |
| hypothesis | educated guess based on research |
| procedure | steps you will follow to test a scientific problem |
| materials | list of everything you need to run the experiment |
| experiment | the actual testing of the problem |
| data | Info gathered during the experiment |
| observations | any changes you notice during the experiment |
| conclusion | statements about the results of the experiments |
| theory | final factual statement about the results |
| type of body system in an earthworm that carries the blood | circulatory system |
| where a tapeworm lives once it enters the body | intestines |
| hairlike structures on an earthworm | setae |
| body system in an earthworm that contains the crop, gizzard, and intestines | digestive system |
| some earthworms can cause what? | disease |
| what do earthworms breath through? | their skin |
| how worms are classified into groups by what? | their shape |
| Number of body openings in a flatworm | one |
| number of body openings in a roundworm | two |
| crop | where food is stored |
| gizzard | grinds food |
| eyespots | nerve organs on a flatworm's triangle- shaped head for detecting and reacting to light |
| bilateral symmetry | means the worm has matching left and right sides when you divide it half lengthwise |
| regeneration | ability to regrow missing body parts |
| annelid | means "little rings" |
| cilia | tiny hairs that cover the bodies of flatworms |
| the 10 steps in the scientific method | problem, research, hypothesis, procedure, materials, experiment, data, observation, conclusion, theory |
| earthworms lack a what? | respiratory system |