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6th Grade Science Notes
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Birds meet their needs on land, in water, and in the air. (McDougal Littell: pages 173-179)
Vocabulary:
1. Endotherm:- Definition: an animal that maintains a constant body temperature.
- Sentence: Maintaining body temperature allows endotherms to live in some places where frogs, turtles, and alligators cannot.
- Characteristics: a cool ectohermic animal's body = a less active animal
- Definition: the process of keeping eggs warm by bodily heat unitil they hatch.
- Sentence: Birds incubate their eggs by sitting on them.
- Characteristics: most birds use their body heat to keep eggs warm
- Definition:the movement of animals from one region to another in repsonse to changes in the seasons or the environment
- Sentence: Unlike plants, animals can respond to seasonal change by changing their location through migration.
- Characteristics: Animals migrate by instinct. They do no have to plan their journey.
Bird species live in most environment (pages 173-174):
- birds are vertebrates
- there are nearly 10,000 of species of birds
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there adaptations allow them to live all over the world:
- some live in a wide range of environments (example: pigeons)
- others are limited to living in one place
- many travel long distances
- some migrate as the seaons change
- some cover long distances searching for food
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characterisitcs of birds:
- have feathers & beak
- have four limbs; a pair of scaly legs & pair of wings
- have eggs with hard shells
Bird How They Obtain Food Pelican scoop their foold from the water Cardinal crack ipen seeds & eat the insides Swallows skim insects from a pond's surface Hawk swoops down on smaller prey
Birds can maintain body temperature (page 174):
- birds are endotherms (an animal that maintains a constant body temperature
- mainting temperaterms allows endotherms to live in some places where frogs, and alligators cannot
- a cool ectothermic body = an animal that slows down and becomes less active
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less active animal:
- consumes little or no food
- unlikely to reproduce
- moves slowly or becomes idle
- breathes less
- nervous system = less repsonsive
- heart pumps slowly
- digestive system slower
- if an ectothermic animal stays cool for too long it will die
updated: 11/29 at 12:50 pm