What is the difference between intraspecific and interspecific competition?

Intraspecific and interspecific competition are terms we use when talking about both biology and ecology. Both refer to situations in which organisms are competing for the same resources in nature. Resources can be food, water, or anything you could think of that a living thing would need to survive in the wild.
A great way to learn and remember the difference between these two terms is to analyze the words and take look at what their prefixes mean.
Intra- meaning within or inside. (Like how intramural sports are played by teams from within the same school or area.)
Intraspecific competition is when organisms within the same species compete for resources.
Inter- meaning between. (Like how an intermission takes place between the acts of a play.)
Interspecific competition is when competition for resources happens between different species of organisms.