 November 4

“OUCH !” you cry. You have touched a spoon that you left in a pot of boiling soup. What property of matter does the hot spoon illustrate? A insulation B mass C magnetism D conduction

When roads are covered with ice, drivers are more likely to lose control of their cars. Why is this true? A Ice roads are more magnetic than dry roads. B Gravity decreases when a dry road ices over. C Icy roads have more friction than dry roads. D Icy roads have less friction than dry roads.

Which of the following is true of a force? A Force can cause an object to change its speed. B Force can change the direction of an object. C The motion of an object changes when a force is applied to it. D All of these are true.

A B C D

Today, scientists know that vibrations create sound and that light travels in waves. Which of the following statements is true about how scientists validate theories? A. Scientists validate theories by discussing their weaknesses. B. Scientists validate theories by publishing a book. C. Scientists validate theories by purchasing materials. D. Scientists validate theories by repeated investigations.