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dino912
'' Why did the dinosaurs disappear ?''
Question | Answer |
---|---|
extinct | no longer living or existing. |
tyrannosaurs | large dinosaurs with small forelimbs and large heads. |
brachiosaurs | big dinosaurs with long necks, nostrils above the eyes, and forelegs longer than hind legs. |
stegosaurus | a dinosaur with a short neck, a small head, and long hind legs. |
triceratops | a dinosaur with a horn above each eye and a horn on its nose. |
rift | an opening caused by splitting, a narrow crack in rock. |
continents | the seven main land areas on the earth. |
ancient | very old. |
minerals | substances formed in the earth by nature. |
geologists | scientists who study the origin, history, and structure of the earth. |
molten | melted by heat. |
convection | the transfer of heat by motion, especially an upward motion. |
atmosphere | all the air around us. |
climate | the usual weather that occurs in a place, including the average temperature and average amounts of rain or wind. |
average | typical or usual level. |
nitrogen | a colorless,odorless gas that makes up about four fifths of the atmosphere. All plants and animals need nitrogen. |
oxygen | a colorless,odorless,tasteless gas. It is needed for animals and plants to live. |
argon | a colorless,odorless gas that makes up about one percent of the earth's atmosphere. |
carbon dioxide | a colorless, odorless gas that is composed of carbon and oxygen and does not burn. It is produced when animals breathe and when fuel containing carbon burns. |
methane | a colorless and odorless gas that burns easily used a s fuel. |
radiation | the process of giving off energy in rays or waves. |
meteorologists | scientists who study the atmosphere |
absorb | to take in and become part of |
equations | mathematical statements to show that two things are equal |
fertile | able to produce crops, rich |
economies | the managing of money and materials |
informed | aware and knowledgeable |