Pg Why is air matter but light is not? Air has mass and takes up space, while light does not.

2. Explain which parts of a camp fire are matter and which parts are not. The wood that is burning, the smok, and other gases that drift away, and the embers and ashes left behind are all matter; neither the flames nor the heat and light produced by the fire are matter.

Pg How can you measure the volume of the marble? Measure the water level before and after the marble is dropped into the graduated cylinder with water. Then find the difference between the two values. Ex: 54 mL – 30 mL = 24 mL

Pg What is the difference between mass and weight? Mass is the amount of matter in an object and it does not change. Weight is the measurement of the pull of gravity on an object and it depends on the planet where the measurement takes place.

5. If you drop an object into 5 mL of water and the water level rises to 8mL. What is the volume of the object? 3 mL or 3 cm 3 (8mL – 5mL = 3 mL 1 mL = 1 cm 3

Pg What properties do the objects shown here illustrate? Hardness, malleability, conductivity, ductility

7. How do the physical properties of iron and copper compare? Iron is attracted to magnets. Copper is not.

8. How has the production of new types of plastic helped encourage new inventions and innovations? Electrical insulators.