Eduardo is narrowing the focus of his science fair project and compiling a list of research questions his project can answer. which of the following questions can be answered scientifically? a. which brand of sugar-free popsicle melts the fastest? b. which brand of mp3 player sounds the best? c. which brand of bandage hurts more to remove? d. which brand of orange soda do people prefer?

Ecologist have observed a sharp increase of sulfur dioxide in the air . what might be a possible consequence of excessive sulfur dioxide in the air ? a. acid rain b. ozone layer depletion c.ozone layer hole d.increase in sea levels

Students in biology are studying the macromolecules of life. they used a calorimeter to determine the calories in various types of food. once the lab was completed, the students ate the left over food samples. monica commented that in just 6 or 7 "chews" of the saltine, it was gone; nothing but a sticky paste in her mouth. elaborate on what happened chemically while chewing the saltine. include the macromolecules present.

What are characteristics of minerals? select 3 choices