Conductivity of Materials and Insulators

The video explores the concept of conductors and insulators by testing various materials. It explains that conductors allow the flow of electrons, resulting in electric current, while insulators do not. The video demonstrates experiments with materials like copper, plastic, aluminum, wood, a Sharpie, water, saltwater, a screwdriver, a pickle, celery, and an apple. It concludes with a summary of which materials are conductors and which are insulators, highlighting that most electrical insulators and conductors are also thermal insulators and conductors.

What is the main characteristic of a conductor?

• It blocks the flow of electrons.

• It reflects electrons.

• It absorbs electrons.

• It allows the flow of electrons.

Which material was found to be a conductor in the video?

• Copper

• Wood

• Sharpie

• Plastic

What happens when salt is added to water in terms of conductivity?

• It becomes a conductor.

• It remains the same.

• It evaporates.

• It becomes an insulator.

Why does the metal part of a screwdriver conduct electricity?

• Because it is made of metal.

• Because it is insulated by plastic.

• Because it is hollow.

• Because it is painted.

What was the result of testing the pickle for conductivity?

• It exploded.

• It was an insulator.

• It was a strong conductor.

• It was a weak conductor.

Which of the following was NOT tested in the video?

• Apple

• Celery

• Pickle

• Banana

What is a common property of most electrical insulators?

• They are transparent.

• They are magnetic.

• They are also thermal insulators.

• They are also thermal conductors.

Which of the following is an example of a thermal insulator mentioned in the video?

• Iron

• Silver

• Rubber

• Saltwater

What was the conclusion about the apple's conductivity?

• It is a superconductor.

• It is an insulator.

• It is a semi-conductor.

• It is a conductor.

Which material was highlighted as both an electrical and thermal conductor?

• Plastic

• Copper

• Glass

• Wood