3. Plants have properties that make them a practical source of food. Which property makes them a good source of food?

A. resistance
B. mechanical
C. chemical
D. physical

4. Jewelry is made from metals that can be hammered into thin sheets without breaking and can also withstand wear, pressure, and damage. Which properties best describe jewelry?

I. Malleability
II. Electrical Conductivity
III. Durability
IV. Elasticity

A. I and II
B. I, II, and IV
C. I and III
D. I only

5. Metals are used at home for a variety of purposes. If the electrician will install electrical lights in your kitchen, which material(s) is/are practical to use?

I. Gold
II. Silver
III. Copper
IV. Aluminum
V. Stainless Steel

A. I and II
B. III and IV
C. III only
D. V only

Malleability and ductility are two important properties of metals. Malleability allows metals to be hammered into thin sheets, while ductility lets them be drawn into wires. These properties make metals like gold, silver, copper, and aluminum ideal for making jewelry and electrical wiring.

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