The ability to grow in size is a characteristic of living organisms. Although an icicle may grow in size over time, it is considered nonliving because there is 1.an increase in matter, but no increase in the number of icicles
2.an interaction between the icicle and the environment
3.no way for the icicle to move away from heat
4.no metabolic activity present

a c d and f

just finished the assignment

ca has a crystalline lattice with positive ions (since it is a metal, metals are positively charged) and electrons flow freely in its structure since the ca atoms have a large nuclear radius so the electrons are not tightly held, therefore the electrons can flow freely since they are not being highly attracted by the nucleus. moreover, one of the properties of metals are that they are conductors of electricity, thus proving ca is the element.