How many people were killed with a letter opener?

Is grass growing an example of matter and energy cycling through living things? What increases the validity of an experiment? When a tornado has been seen in the sky or on a weather radar in your area the national weather service issues a what? What gas is found in balloons that rise to the ceiling? Why is shiwalik prone to landslides? Does potato or onion have more lipids? What is a Vandergraph? Why does fermentation occur in fungi? How can you tell if an element is flammable? How many volts does an HO train use? What 3 steps did mendeleev took to organize the elements? Why is the US is called the melting point? How was Tenerife made? A peptide hormone that decreases gastric motility? Is there crops cultivated in mud? When the last major eruption of Mount Tambora? Why is equilibrium said to be dynamic in a closed system? What is liquid lubricants? Can you burn pinecones? Is water stronger than lava?