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3 ITI UDA 2 (atoms,conductors,insulators,superconductors)

Total questions: 40

Worksheet time: 45mins

Name
Class
Date
1.

p-type semiconductors:

a)

Carry many protons

b)

Have a tendency to gain electronS

c)

Have a tendency to lose electrons

d)

Easily conduct electricity

2.

The process of adding an impurity to an intrinsic semiconductor is called

a)

Doping

b)

Ionization

c)

Recombination

d)

Atomic modification

3.

Materials which can conduct electricity better than insulator,but not as well as conductors:

a)

diodes

b)

semiconductors

c)

conductors

d)

insulators

e)

superconductors

4.

What is the most common semiconductor material used for producing integrated circuits

a)

Quartz

b)

Silicon

c)

Diamond

d)

Tantalum

5.

__________ are the smallest unit of an element that maintains the properties of the element.

a)

Particles

b)

Atoms

c)

Protons

6.

A nucleus of an atom contains what two parts?

a)

Electrons and Protons

b)

Neutrons and Electrons

c)

Protons and Neutrons

7.

Isotopes of an element have different number of ___________ and therefore have different masses.

a)

Proton

b)

Neutron

c)

Electon

8.

The positive particles of an atom are

a)

Electrons

b)

Positrons

c)

isotopes

d)

Protons

9.
An atom with atomic number 6 would have how many protons?
a)
6
b)
12
c)
3
d)
Cannot be determined 
10.
An atoms overall charge is _____.
a)
Positive 
b)
Depends on its mood 
c)
Neutral 
d)
Negative 
11.

Which of the following is a negatively charged subatomic particle?

a)

Electron

b)

Proton

c)

Neutron

d)

isotope

12.
The atomic number of an elements is the total number of which particles in the nucleus?
a)
Neutrons
b)
Protons
c)
Electrons
d)
Protons and electrons
13.

Where are electrons of an atom found?

a)

Nucleus

b)

Electron Shell

c)

Some are in the nucleus and some in the electron cloud.

d)

They are moving everywhere.

14.
Most of the mass in an atom is concentrated in the _____.
a)
Electrons
b)
Nucleus
c)
Protons
d)
Empty space
15.
Which statement best describes an electron?
a)
Smaller mass than a proton and a negative charge
b)
Smaller mass than a proton and a positive charge
c)
Greater mass than a proton and a negative charge
d)
Greater mass than a proton and a positive charge
16.

What subatomic particle(s) would be found orbiting the nucleus?

a)

Neutrons only

b)

Electrons only

c)

Protons and Neutrons

d)

Protons and Electrons

17.

Anything that has mass and takes up space is called

a)

heterogeneous

b)

homogeneous

c)

matter

d)

density

18.
Ions are: 
a)
atoms with a positive or negative charge
b)
atoms with no charge
c)
atoms with ONLY a positive charge
d)
atoms with ONLY a negative charge
19.
What is the atomic number?
a)
the number of protons
b)
the number of protons and neutrons
c)
the number of neutrons
d)
the number of protons and electrons
20.
Adding or subtracting neutrons (charge = 0, mass = 1) makes the element change into an...
a)
ion
b)
mixture
c)
isotope
d)
neutral atom
21.

Isotopes of an element have a different number of...

a)

Protons

b)

Neutrons

c)

Electrons

22.
Which is NOT an insulator.
a)
Wool
b)
Plastic
c)
Copper
d)
Glass
23.
Is Wood a conductor or Insulator?
a)
Conductor
b)
Insulator
24.
What is the difference between a conductor and an insulator?
a)
An insulator allows electricity to flow through it easily and a conductor does not
b)
A conductor allows electricity to flow through it easily and an insulator does not.
c)
An insulator is magnetic and a conductor is not
d)
A conductor is magnetic and an insulator is not
25.
A great conductor of energy is:
a)
wood
b)
plastic
c)
metal
d)
cloth
26.
All of the following are conductors except _______.
a)
metal spoon
b)
wire
c)
iron nail
d)
plastic spoon
27.
An object that doesn't conduct heat well is known as:
a)
a conductor
b)
an insulator
28.
The plastic covering is there to:
a)
Provide a conductor for electrical energy to flow.
b)
Provide an insulator so that electrical energy will not pass outside of the wires.
c)
Provide a conductor so that electrical energy can NOT flow.
d)
Provide an insulator so that electrical energy can flow.
29.
Olivia wanted to complete her circuit with a conductor.  What object is her best option?
a)
Wood stick
b)
Glass bead
c)
Aluminum foil
d)
Styrofoam
30.
Claire wants to complete her circuit with a conductor.  What object is her best option?
a)
rubber
b)
a penny
c)
card board
d)
plastic spoon
31.

A superconductor is a

a)

material that conducts electricity more easily than others

b)

material that conducts electricity more difficultly than others

c)

material that doesn't conduct electricity at all

32.

We are trying to find a superconductor that has

a)

a lot of resistance

b)

no resistance at all

33.

While we deliver electric power on the grid we lose

a)

15% of current

b)

5% of speed

c)

5% of energy

d)

25% of energy

34.

Which superconductor was discovered in 1911?

a)

mercury

b)

porcelain

c)

ceramic

d)

coil

35.

Which was the problem with mercury?

a)

It needs to be cooled to -145°C

b)

It breaks easily

c)

It is brittle

d)

It needs to be cooled to -269°C

36.

Which superconductor was discovered in 1986?

a)

mercury

b)

porcelain

c)

ceramic

d)

coil

37.

Which was the the solution to make ceramic flexible?

a)

adding rubber

b)

adding glass

c)

adding thin filaments of it inside a ribbon of metal

d)

adding thin filaments of porcelain inside a ribbon of metal

38.

Which the next goals for superconductors?

a)

to find a superconductor that can operate at room-temperature

b)

to find a superconductor that can operate at -145°C

c)

to find a superconductor that can operate at +145°C

d)

to find a superconductor that is flexible

39.

Why is the cooling process of superconductors a problem?

a)

Because it is expensive

b)

Because it is difficult

c)

Because it is impossible

d)

Because it is cheap

40.

Which was the problem with ceramic as superconductors?

a)

It is not flexible

b)

It is white

c)

It breaks easily

d)

It needs to be cooled to -269°C

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