Topic Review Activity Active
A mineral that contains a useful substance or element, such as iron or aluminum, is an):
a vein mineral
C. ore
d. geode
b. gem
Please select the best answer from the choices provided

Identify the missing parts of the carbon cycle

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

Which statements about a food chain are true? choose all answers that are correct. a. plants are the first living organisms in food chains on land. b. the plants in a food chain are called herbivores. c. all food chains on land begin with energy from the sun. d. carnivores in a food chain eat only plants.