Which factor explains why coal dust is explosive?

temperature

surface area

concentration

addition of catalyst

What should you do if you don't know your family's medical history? Look through their personal files to learn about them Ask them politely at a family gathering or in private Get your doctor to contact your family for information Give your best

Which best describes reproduction?

Which of these is a facial bone? frontal occipital lacrimal temporal

A crystal is always ... A. a hexagon B. a cube C. a liquid D. none of these

A condition in which there is a lack of rhythm of the heart beat is:

What is the mass of an atom that has 4 protons, 5 neutrons and 4 electrons? 5 8 9 13

Which of the following is one role of RNA polymerase during transcription? to switch uracil with thymine on the exposed gene to build a molecule of mRNA to break down an already existing protein to produce a start sequence

What is diluvial water

What disease can occur when the pancreas is not working properly?

Which of these objects are malleable? Check all that apply. (A) tin fork and knife from a camping set (B) antique ceramic vase (C) steel pole fence post (D) marble sculpture (E) glass tabletop (F) copper coin