Which of these experiments would make use of qualitative data? a. a study of different shapes to compare rolling friction b. a study on the effects on sunlight on growth rate of plants c. a study of different surfaces to compare ability to repel water d. a study of change in a freezing point of water when salt is added

weather forecasts are done by collecting data about the current state of the atmosphere mainly the temperature, humidity and wind and using meteorology, to determine the atmosphere that evolves over time. the h and l mean the high and low pressure. the red strip is a warm front. the blue strip is a cold front. the blue and red strip is a stationary front. the purple strip is a occluded front.

explanation:

come closer and become far apart and become steam/gas