C165 - Integrated Physical Sciences - Unit Quizzes & Answers

The origin of water on Earth is not yet fully understood. To test one of the hypotheses, scientists launched a gigantic observational balloon to the height of almost 130,000 feet to measure the amounts of water in comets and asteroids based on the light reflected from these objects. The science BEST SUITED to calculating the forces required to launch the balloon to the required altitude is - ANSWER Physics Which physical science is the BEST to study the composition of Earth's atmosphere? - ANSWER Earth Science The science BEST for studying how hydrogen sulfide and carbon dioxide react is - ANSWER Chemistry The science BEST for studying photosynthetic bacteria is - ANSWER Life Science What is usually the main advantage of being able to do a laboratory experiment rather than a field study if both investigations allow you to collect similar information? - ANSWER It is possible to change only one variable at a time. Some students carry out an experiment in which they tilt a wooden plank by propping up one end with books, so that its height is a distance h above the table. The students release a steel ball bearing at different positions along the ramp measured as x. Each time they do this for a different value of x, they measure the speed of the ball bearing at the end of the ramp. - ANSWER Anwers: Independent variable: x Dependent variable: Speed Control variable: h Which of these fields depends the MOST on observational studies? - ANSWER Earth Science The kinetic theory of gases is based on the assumption that the molecules that form the gas are in random motion and bounce off the walls of their container and off each other as if they were billiard balls. The forces between real molecules are more complicated. This is an example of: - ANSWER Using a model Why can't astronomers carry out a scientific research study to determine which visible star, other than our sun, is the nicest? - ANSWER There is no way to prove any answer wrong. Galileo found that when air resistance can be ign