What are three examples of a compound mixture?

Which would best keep the oxygen cycle stable? a. cutting down jungles to create farmland b. eliminating parks in large cities c. dumping toxic chemicals into the ocean d. reducing the amount of deforestation d. reducing the amount of deforestation

Which of the following types of rock would most likely contain a fossil? slate granite lava rock limestone

Which of the following was not a major animal on land during the carboniferous period? amphibians insects both a and b none of the above