Go with your gut and learn from mistakes.
Answer:
Because of the difference in amount of snowfall and rainfall. New York City also gets either very hot or very cold but Seattle is much more mild.
Explanation:
Mountains because the tectonic plates are colliding and pushed up against each other.
You see how much the scale is, let's say that it is 150 mm=300 miles. If it goes over, you can measure it with a ruler, or move with your hands, measuring it as well as possible and estimating. Hope this helps! :)