Test

#1

100

Matter can exist in only two states: solid or liquid.

(What is False?)

200

Matter has mass and occupies space

(What is True?)

300

In 1808, this scientist proposed that all matter is composed of atoms.

(Who is John Dalton?)

400

This type of electric current reverses its direction of flow at regular intervals.

(What is alternating current?)

500

William Gilbert used this term for materials that could be charged.

(What are eclectriks?)

#2

100

This part of an atom has no electrical charge.

(What is a neutron?)

200

This is the smallest part of a compound that still retains the compound’s properties.

(What is a molecule?)

300

This type of material has four valence electrons and decreases in resistance when heated.

(What is a semiconductor?)

400

This is the most common method used to produce electricity today.

What is magnetism?)

500

According to bump theory, additional striking energy causes an electron to do this.

(What is move out of orbit and become a free electron?)

#3

100

A semiconductor contains this number of valence electrons.

(What is four?)

200

This basic law of physics states that like charges do this, while opposite charges do that.

(What is repel; attract?)

300

Any object repelled by this material rubbed on silk would have a positive charge.

(What is glass?)

400

This part of an atom carries a negative charge.

(What is an electron?)

500

This type of material contains seven or eight valence electrons.

(What is an insulator?)

#4

100

This force is demonstrated by objects with like electrical charges.

(What is repulsion?)

200

Alternating current is best described using this term.

(What is bidirectional?)

300

When the principal energy level n=4n = 4n=4, this is the maximum number of electrons the orbit can hold.

(What is 32?)

400

The ancient Greeks first discovered electricity about this many years ago.

(What is 2,500?)

500

This atomic model states that electrons exist in specific orbits around the nucleus determined by their angular momentum.

(What is the Bohr model?)

#5

100

This substance is an example of an electrical insulator.

(What is sealed wax?)

200

The greater the difference in the number of electrons between negative and positive terminals, the greater this becomes.

(What is the force of repulsion and attraction?)

300

Whenever an electric current flows through this, a magnetic field is created around it.

(What is a conductor?)

400

This is the smallest part of an element that still retains the properties of that element.

(What is an atom?)

500

This is created when an excess of electrons forms at a terminal.

(What is a negative terminal?)