7.which physical property requires no tools, scales, or other equipment to determine?
a. hardness incorrect answer
b. fracture incorrect answer
c. color incorrect answer
d. cleavage incorrect answer

Mary is conducting an experiment on how pollution affects plant growth. how can she ensure that her data are reliable?

Movement that is like a t a type of wave that transfers energy where the particles in the medium move in a circle motion while the energy travels left or right. a type of wave that transfers energy where the particles in the medium move perpendicular to the direction in which the energy is traveling. transfers energy from one location to another a type of wave that transfers energy where the particles in the medium move parallel to the direction in which the energy is traveling. movement that is back and forth, like an equal sign = 1. wave 2. parallel movement 3. perpendicular movement 4. transverse wave 5. longitudinal wave 6. surface wave

Atoms contain subatomic particles called protons and neutrons. when these protons and neutrons spilt, a lot of energy is released