If a mineral breaks into cubes when struck with a rock hammer, which property of a mineral is being measured?

Which of the following is a reason why early living organisms on earth could not have survived on the surface? 1. the lack of an ozone layer 2. the lack of oxygen in the atmosphere 3. the fact that these organisms were single-celled

All phases of matter may have a fixed mass

Brendan made a diagram to compare and contrast the benefits of two types of social behavior. which description belongs in the area marked "z"? reproductionprotectionforaginghydrodynamic efficiency