1. Carbon Dioxide 2. respiration 3. animals 4. plants 5. Oxygen 6. combustion
Answer:
Rocks can be divided into three basic classifications: igneous, sedimentary, and metamorphic. The following tests are used by experts to classify rocks: Hardness Test Minerals are scaled in range from 1 to 10, with 1 being softest and 10 hardest. The method of determining hardness is the scratch test.
The following statements refer to genetic factors: Joey has green eyes, Joey is very tall and Joey has brown hair. Hope this helps!