Compare and Contrast Matter

Multiple Choice

Which of the materials below is the best conductor of thermal and electric energy?

• Rubber

• Cardboard

• Plastic

• Aluminum

Multiple Choice

Students use a circuit to investigate the properties of six objects. The buzzer makes a sound if an object completes the circuit. The circuit and observations are shown below.

Which objects are electrical CONDUCTORS?

• eraser, toothpick, cotton ball

• eraser, paper clip, safety pin

• toothpick, paper clip, safety pin

• paper clip, safety pin, aluminum foil

Multiple Choice

While making salt water for a science project, you observe the salt dissolving in the water. Which statement accurately describes the solubility of salt in water?

• Salt sinks in water

• Salt does not dissolve in water

• Salt dissolves completely in water.

• Salt floats on top of water.