Which level of organization is a group of similar cells that work together to perform a certain function? molecule organ organ system tissue

In which layer of earth do most earthauakes occur a_ inner core b_outer core c_mantle d_crust

Acurium-245 nucleus is hit with a neutron and changes as shown by the equation. complete the equation by filling in the missing parts. 52

6. using 3 – 4 sentences explain (in your own words) why water expands when it freezes? 7. using your knowledge of colligative properties explain whether sodium chloride or calcium chloride would be a more effective substance to melt the ice on a slick sidewalk. use 3 – 4 sentences in your explanation.