Because it is uncertain whether it really was an accident or not. They use it to try and avoid misconceptions.
Hope it helped!
Must be talc because it is one of the softest minerals
In the sporophyte phase a diploid (having two sets of chromosomes) plant body grows and eventually produces spores through meiosis. These spores divide mitotically to produce haploid (having a single set of chromosomes) gamete-producing bodies called gametophytes. ... The sporophytes of all conifers are trees or shrubs.
The solute dissolves other chemicals in a solution
Nutritionists use calories to measure how much energy we get from food.