When a pyrite crystal is hit with a hammer it breaks into pieces with smoothly curved edges what mineral characteristics does this relate to
a. streak
b. luster
c. fracture
d. hardness

When proteins are being produced by a cell, scientist say that the genes are question 2 options: activated turned off replicated deactivated

Which statement is the best summary of the model? a-a series of aerobic and anaerobic reactions take place in cells b- the sun's energy moves through trophic levels in a food chain c-light energy is converted into stored chemical energy plants. d- food molecules are broken down in the cells if living things.

In which ways are mercury and venus similar?