Someone please answer these for me:) :
1) how many seismic stations are needed to locate the epicenter?
2) what can you determine if you know the arrival time of the P wave and S wave at a seismic station?
3) are earthquakes cyclic?

How many variables are altered in a good experiment? a.1 b.0 c.2 d.3

(drag each tile to the correct location.) categorize each term as something that is typical of a scientific theory, a scientific hypothesis, or both. - a tentative statement used to guide scientific investigations. - makes predictions about future events. - can be tested by many independent researchers. - based on observations of natural phenomena. - a well-established, highly reliable explanation.

What is a limitation of using a chemical formula, such as c6h1206, to represent a compound? the chemical formula does not show the types of elements that make up the compound. the chemical formula does not show how the atoms are connected to one another the chemical formula does not show the number of atoms of each element in a molecule. the chemical formula does not show the chemical symbols of the elements in the compound