Question

why do you notice dew drops on winter mornings

Answer 1

Because dew is form under only some conditions. If a warm clear day is followed by a cool clear evening dew is likely to be formed. This is what happens during winters

Answer 2

bcoz in winter time dew drop are found on the leaf of plant bcoz in winter the the air temperature is cool down due to which the air and gases and vapour convert in drop. due time decreasing in temperature.