Hypothesis: If I put a chocolate bar on the table near a sunny window, it will melt faster. If your independent variable is the placement of the chocolate bar and the dependent variable is the speed at which it melts, what are some controlled variables that one must have during each trial?

Which of the following does not describe a physical property of iron? a iron is silvery-white or gray in color. b iron has a boiling point of about 3,000°c. c iron is a magnetic element . d iron and sulfur react to form iron sulfide.

Monomers are the building blocks of larger molecules, called polymers. for example, proteins are composed of chains of amino acids that are linked together. cellulose is a polymer that makes up plant cell walls. cellulose is made from a chain of c6h10o5 molecules. which monomers are most likely used to produce cellulose? why?

Where substance is produced during cellular respiration