Cell Theory: 1. All living things are made of cells. 2. All cells come from pre-existing cells. 3. Cells are the basic unit of life. A scientific theory is a well-tested explanation for a broad range of observations. They are accepted as truth, but can be revised with further observations, discovery and testing. Scientists once believed life spontaneously arose from nonliving things. The three parts of the cell theory as we know it today came from the work of multiple scientists over many years. Which of the following scientists contributed to the cell theory?

The difference between the atomic number of an element and the element’s atomic mass is the number of ions.

What type of radiation is lead emitting in the following equation? alpha particles beta particles gamma rays

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