Web Links Home Lesson 1 Science Notes Design Your Solar System Web Links Home . Density These are three words that we need to understand if we are going to deal with objects in space. Let's look at them one at a time. Then they run off looking for the scales. Our society is very concerned about weight.
Weight is measured using scales and weighing machines.
It is measured in pounds and ounces or Kilograms and grams. What weight really measures is how strongly the gravity of your planet is pulling on you. For instance, here is one of Dr Viau's students. She weighs 100 pounds on earth. However, when she goes to other planets, her weight changes because the planets have different gravities from the gravity on earth.