Each of those groups is called a class. Each of those classes is of a certain width and this is referred to as the Class Interval or Class Size. This class interval is very important when it comes to drawing Histograms and Frequency diagrams.
Burns can come from anything hot. Microwaves, the sun, (sometimes the refrigerator,) a TV, computer, or handheld game that was turned on for a long time, active volcanoes, la â¦ va, fire, friction, steam, hot water, etc., can cause burns. Or cold. Burns are caused by rapid changes in temperature
What is a superficial burn? A superficial burn, or first-degree burn, is when the outer layer of skin has been burned. What causes a superficial burn? Direct exposure to heat is the most common cause of superficial burn. This includes contact with hot objects or flames, such as an iron, a skillet, cigarettes, or fireworks. The following may also cause a superficial burn: 1  Harsh chemicals, such as cleaning products, car battery acid, gasoline, lime, or chlorine. 2  Damaged electrical cords or electrical outlets. 3  Hot water or steam. 4  Sunburns or tanning beds.