How do collisions between molecules transfer energy from a system of reacting substances to its surroundings?
A. They cause the potential energy of the system to increase.
B. They cause molecules to flow into the system from the
surroundings.
C. They cause the thermal energy of the surroundings to decrease.
D. They cause heat to flow from the system to the surroundings.
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If the density of water is 1.0 g/cm3, which of these materials would float in water, based on their densities? check all that apply. aluminum cork iron lead wax

The organism shown is a free-living one that is anchored to the bottom of ponds and streams during one stage of its life cycle what is the common name for the group to which this organism belong

Essay-alternative energy sources research sources of energy that are being developed. write a report of 350-400 words discussing the information you learned concerning the development of various energy sources and the impact that you think they will have on your life. include sources cited at the end of your report using the mla format. follow the rubric guidelines. note that wikipedia is not an appropriate resource for a research paper. worth 99