lalalaljsk
For acceleration to occur, there must be a change in an object's velocity over time. This change can happen by increasing or decreasing the object's speed or by changing its direction of motion. In essence, acceleration is a measure of how much an object's velocity changes per unit of time.
mating must happen randomly
For a new moon to occur the moon must be between earth and the sun
mating must happen randomly
A population must be isolated in some way
mating must happen randomly
mating must happen randomly
mating must happen randomly
For the Doppler effect to occur, there must be relative motion between the source of the wave and the observer. As the source moves towards or away from the observer, the frequency of the wave appears to change, causing a shift in the perceived wavelength.
Melting and solidification are the processes that must occur for a rock to change into igneous rock.
The process that must occur to change any rock to igneous rock is melting.
a reveiw of what is known about the subject must occur