Jacob is unsure about how to focus a slide under the microscope. What would be Jacob's best course of action? Ask the teacher for instructions.
O Ask his lab partner for instructions.
O Watch another student, and copy what he or she does.
O Use the trial-and-error method until the slide focuses.

Mars and earth have quite a few things in common. both are  terrestrial planets, both are located within the sun’s  habitable zone, both have  polar ice caps, similarly  tilted axes, and similar  variations in temperature. and according to some of the latest scientific data obtained by rovers and atmospheric probes, it is now known that mars once had a  dense atmosphere  and was covered with  warm, flowing water.