Collect data: Select the EARTH tab. Fill in the information for the latitude 40° S, on June 21 and December 21. (To measure the Sun ray angle, select Show protractor. The angle will be between 0 and 90 degrees.)

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?

In this case, the statement that people who exercise for an hour may have lower cholesterol levels is .

Which statements explains what the fossil records indicates? check all that apply. a) earth is 4.5 billion years old b) many organisms have become extinct c) mammals have always existed on earth d) mass extinctions have occurred several times on earth e) the amount of water on earth has decreased over time?