了解太阳和季节的关系一年中白昼最长的是哪一天在北半球,太阳最高、日照时间最长的一天是夏至,查一下这一天几点日出、几点日落。让孩子理解一天中太阳最高的是正午,阳光直射,此时影子最短;反这太阳低的时候,阳光斜射,影子则长。向孩子解释夏至是一年中日照时间最长的,但不是一年中最热的一天。 Understand the relationship between the sun and the season the longest day of the year in which day in the northern hemisphere, the highest sun, the longest day of the sunshine is the summer solstice, check out this sunrise when the sunrise and sunset. Let the children understand that the sun is the highest in the day at noon, direct sunlight, at this time the shortest shadow; against this low sun, the sun oblique, the shadow is long. Explain to children that the summer solstice is the longest sunshine a year, but not the hottest day of the year.