These two particles are located in the nucleusof an atom. A) electronsB) protonsC) neutronsD) B and C

Consider the nuclear equation below. 239 > x + 4 he 94 2 what is x? 1.235 cm 96 2.243 u 92 3.235 u 92 4.243 cm 96

Why do scientists look for patterns in the world? a. patterns can explain observations. b. patterns never change, no matter what. c. patterns are easy for scientists to detect. d. patterns are all the same, through all time.

Using data from seismic waves, geologists have learned that earth’s interior is made up of several