1. You exert a force of 50N to push a shopping cart down an aisle. Your friend helps by exerting a force of 30N against the shopping cart in the same direction. Which net force do you and your friend exert on the shopping cart? a.20N b.50N c.80N d. 1500N What are the three types of matter? a.solid, liquid, gas b.Element, compound, mixture c.Larry, Curly, Mo d.Hot, cold, warm

2. The two balls in the diagram are solid and are made of the same substance. How do the gravitational forces exerted by each ball on a distance mass compare? a.Ball A exerts a greater gravitational force because it is smaller b.Ball B exerts a small gravitational pull because it has a larger surface area c.Ball B exerts a greater gravitational force because it has more mass d.The two balls exert the same gravitational force What particles of the atom are found in the nucleus? a.Protons and neutrons b.The middle c.Electrons and protons d.Electron cloud A B

3. A tennis ball is made the exact size and mass of a golf ball. Both the golf ball and the tennis ball are rolled onto a concrete sidewalk. The tennis ball slows down, but the golf ball continues moving. Which of the following best describes a reason for the difference in the reaction of the two balls? a.The tennis ball is colder than the golf ball b.The tennis ball is darker than the golf ball c.The effects of friction are greater on the tennis ball d.The effects of the Earth’s gravity are greater on the golf ball A chemical change occurs when a.A substance changes state b.Bonds break and new bonds form c.A solute dissolves in a solvent d.A substance changes shape

4. Answer Key Slide one C; B Slide two C;A Slide three C;B