Can you explain Physical Science Example 10.2 in a different way? Can you explain Physical Science Example 11.1 more? How do you manipulate the gravitational force? How are stars classified (Physical Science, Module 16)? How do I access the links mentioned in the Physical Science Student Notebook? How do you calculate the correct height in Physical Science Experiment 9.3? How do you solve Physical Science On Your Own 12.2? If the universe is expanding, why is the Andromeda galaxy moving towards us? In Module 9, Test Question 11, how can the rock and ball have the same acceleration? The ball was thrown and thus has a higher velocity. In Physical Science Example 9.6, the equation time changes from 1.2 seconds to 1.44 seconds without explanation. Why was this done? In Physical Science Experiment 1.1, why didn't the wire attached to the negative terminal of the battery turn green like the one attached to the positive terminal of the battery? In Physical Science Module 11, Study Guide Question 6, why do you say distance was reduced by a factor of 3? It went from 12 to 4. In Physical Science Module 12, Study Guide Question 4, how do you get an increase by a factor of 8? In Physical Science On Your Own 10.8, why does the cat's resistance play a role? In physical science On Your Own 2.3, wouldn't the water vapor in the air INCREASE the percentage of oxygen? In Physical Science On Your Own Question 1.2, why is the answer molecules? After all, aren't molecules made up of atoms? Is too much oxygen in the air really bad for you? I have heard some people say that increased oxygen is good for you, like in hyperbaric chambers. On the Physical Science Module 11 Test, Question 13, why is the answer, “The General Theory of Relativity”? What if my results in Physical Science Experiment 2.3 are not those discussed in the book? What is the bulb thermometer used in Physical Science Experiment 2.1? What is the chemical reaction that occurs in Physical Science Experiment 1.1? Where can I get the weather data I need for Physical Science Experiment 7.1? Where can iron nails for Experiment 6.3 be purchased? Why doesn't the gravitational attraction between the earth and the sun pull the earth into the sun? Why doesn't the gravitational attraction of the earth and the moon pull the moon into the earth? Why do I get different answers when I use the equation for the speed of sound in Physical Science? Why don't the electrons in an atom just fall into the nucleus, since they are attracted by the positive charge? Why is the charge blue in Physical Science Experiment 8.1, but the charge is yellow when I get shocked going down a plastic slide? Also, why does it hurt when I get shocked on a slide and not in the experiment?