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Does an object have the same mass on Earth as it does on the Moon? 1.Yes 2.No

For billions of years, the planets have been in a state of motion as they orbit the Sun. Which of the following is true? 1.A force must be continuously exerted on a planet in order to keep it in motion. 2.The planets do not require a force in order to keep them in a state of motion.

Which of the following is true about objects that fall toward Earth? 1.Heavier objects always fall faster than lighter objects. 2.All objects fall at the same rate, but air resistance affects the rate of falling.

When you suddenly apply the brakes in a moving car, loose objects inside the car tend to fly forward. Why? 1.Because objects in motion have a tendency to remain in the same state of motion. 2.Because a force is being applied to those objects causing them to move forward.

Which of the following indicates that an acceleration is occurring? 1.An increase in velocity. 2.A change in the direction of velocity. 3.A decrease in velocity. 4.All of the above.

An insect collides with a speeding bus. Which of the following is correct? 1.The bus exerts a greater force on the insect than the insect exerts on the bus. 2.The insect exerts a greater force on the bus than the bus exerts on the insect. 3.Both exert the same magnitude of force on each other.

Which explains why astronauts aboard the International Space Station are weightless? 1.Gravity does not exist at that distance from the Earth’s surface. 2.Orbiting objects are in a state of free fall relative to Earth’s surface which results in a state of weightlessness. 3.The gravitational forces of the Earth and the Moon cancel each other out where the space station is orbiting.

The Law of Conservation of Energy states that: 1.It is best to use as little energy as possible in accomplishing a task. 2.A system must be more efficient in order to not waste energy. 3.Energy cannot be created or destroyed; it may be transformed from one form to another. 4.All things in the universe move toward a lower state of energy.

Which of the following is a scientific statement about a general relationship between natural quantities that has been tested over and over again and has not yet been contradicted. 1.Law 2.Hypothesis 3.Theory

Law: a general statement about the relationship of natural quantities that has been tested over and over again and has not been contradicted. –Also known as a Principle. The Nature of Scientific Inquiry

Hypothesis: an educated guess; a reasonable explanation that is not fully accepted until tested over and over again by experiment. –All hypotheses must be testable – always open to the possibility of being proven false. –If a favorite idea fails a well-designed test, it’s wrong. Get over it! “No number of experiments can prove me right; a single experiment can prove me wrong” – Albert Einstein The Nature of Scientific Inquiry

Theory: a synthesis of a large body of information that encompasses well-tested and verified hypotheses that explain certain observable facts. –Scientific theories evolve as they go through stages of refinement and redefinition. –Theories must always be shaped to fit the facts. The Nature of Scientific Inquiry