Nearly all fossils occur in what kind of rock?

Why does burning of candle produce flames and burning of coal cannot? When you exhale your body gets rid of what? What element commonly has only a proton as its nucleus? Are gametes living? What environmental problems in the countries Nepal and Bhutan is causing soil erosion? Is a driftwood fire blue and green? Do most wildflowers produce sexually or asexually? How does the first ionization energy change going down and across the periodic table? How does plate tectonics affect the earth? What do scientists consider the number one cause of extinction? Why does a glass of water contain bubbles after being left out on a counter all night? What is the name for a volcanic avalanche containing hot volcanic gases ash and volcanic bombs? Is high pressure usually associated with calm or stormy weather? What type of front extends southward from the center of the low? How did Zacharias Jansen make Anton van leeuwenhoeks discoveries possible? What is an abnormally rapid rate of deep respiration that is usually associated with anxiety is? Would lithium or helium have a higher melting point? Does moss have vascular tissue to carry water and food? What is a ruby red trout? What are the characteristics of each of the two arms of the adaptive defense system?