Critics of copernicus's heliocentric cosmos argued that, if earth moves around the sun, our moon would get left behind. which of galileo's observations countered that argument? (a) jupiter's moons stay with jupiter as it moves through space (b) venus and mars stay with earth as it moves through space (c) mars has an elliptical orbit (d) the moon's gravity is too strong for it to get left behind (e) the sun's gravity is too weak to pull the moon from earth

Can you match these to the correct definition

Ais a machine that makes work easier when a single force is applied. a simple machine b compound machine c endangered machine d complex machine

Researchers conducted an experiment to identify the effects of three different hand sanitizers on the growth of bacteria. the researchers grew one type of bacteria in twenty-four identical covered petri dishes. then, they opened eighteen petri dishes and applied the three hand sanitizers to six petri dishes each. they left the remaining six petri dishes closed as a control group. when the researchers measured the growth of bacteria two days later, the six dishes that had no hand sanitizer showed the least amount of bacterial growth. the researchers concluded that not using any hand sanitizer would lead to the least bacterial growth. which statement best explains why the researchers’ conclusion was not justified? the experiment tested too many variables. the control group was not treated the same as the experimental group. the sample size of twenty-four petri dishes is not large enough. the single type of bacteria is not adequate to make any conclusions.