Ascientific is a possible explanation for a pattern observed repeatedly in the natural world

25) a student takes four samples of a white crystalline solid and places each in a well plate. on top of each sample, she carefully places 20 drops of clear mystery liquids a, b, c and d. her results for each well are: liquid a: the solid dissolves quickly. liquid b: the solid appears unchanged. liquid c: a brownish colored liquid is produced. liquid d: fizzing occurs and the well becomes warmer. in which well does a physical change occur?

What controls traits and inheritance

If the temperature in an area drops five degrees between one day and the next, has the climate of the area changed? explain.