The main goal of science is to
1)collect facts and learn “the truth”
2)understand nature
3)do wild and crazy experiments
4)is to produce facts

Match the atomic particles with their characteristics. 1. made of two protons and two neutrons neutron 2. similar to an electron; positive charge neutrino 3. orbits nucleus; negative charge positron 4. bundle of energy; zero charge proton 5. found in nucleus; positive charge meson 6. very unstable; +, -, or zero charge gamma 7. found in nucleus; zero charge electron 8. negative particle; negative charge beta 9. atomic energy converted to mass alpha

How is the gravitational force related to the distance between two objects?

What are similarities and differences of reflection, refraction, diffraction and absorption?