What is the difference between mass and weight? Mass is the number of atoms an object is made up of. For example a living being is made up of Carbon, Oxygen, Nitrogen, Sulphur, Phosphorus, Hydrogen, and other atoms. So if you traveled to the moon, your mass will be the same as on Earth. Why? Because you are a whole person, nothing taken away or added. Weight is different, because weight has to do with the force of gravity which is different on Earth versus other celestial objects like the moon, Mars, etc. On Earth, gravity is 9.8 m/s2 or 9.8 meters per second squared. The moon is ⅙ the gravity on Earth or 9.8 m/s2 times ⅙. 1. So gravity on the moon would be 9.8 m/s2 divided by 6. What is the gravity on the moon? Don’t forget to include the units m/s2 .

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.