Quiz about Science Prac. Test sec. 1

Question 1

According to ancient Western thought, which of the following was NOT one of the four basic elements?

Accepted Answer

Hydrogen

Answer

Fire

Answer

Water

Answer

Air

Answer

Earth

Question 2

What do we now know about the elements on the Periodic Table?

Accepted Answer

They are made of even smaller pieces.

Answer

They are the smallest possible particles in the universe.

Answer

They are made only of earth, air, fire, and water.

Answer

They are infinitely divisible.

Answer

They are indivisible and fundamental.

Question 3

What did some ancient philosophers believe about dividing matter?

Accepted Answer

that you could keep cutting it into smaller pieces forever

Answer

that everything was made only of hydrogen and oxygen

Answer

that atoms were made of fire and water

Answer

that matter could not be divided at all

Answer

that all matter was made of feathers and paper

Question 4

Benjamin Franklin's experiments with the key and thunderstorm demonstrated which of the following?

Accepted Answer

that lightning is an electrical phenomenon

Answer

that thunder is louder than lightning

Answer

that lightning is caused by protons

Answer

that static electricity can create rain

Answer

that electricity cannot travel through metal

Question 5

Which particle plays no role in electricity because it has no electric charge?

Accepted Answer

neutron

Answer

proton

Answer

electron

Answer

photon

Answer

ion

Question 6

Which type of charge does an electron have?

Accepted Answer

negative

Answer

positive

Answer

neutral

Answer

variable

Answer

zero

Question 7

According to Newton's third law of motion, what happens when one object exerts a force on another?

Accepted Answer

The second object exerts an equal force back on the first object.

Answer

Only the smaller object moves.

Answer

The force disappears.

Answer

The force increases over time.

Answer

The objects combine into one.

Question 8

What is the mass of a typical adult human?

Accepted Answer

60 to 70 kg

Answer

10 to 20 kg

Answer

100 to 120 kg

Answer

30 to 40 kg

Answer

150 to 160 kg

Question 9

What is the charge of a proton?

Accepted Answer

positive

Answer

neutral

Answer

negative

Answer

zero

Answer

variable

Question 10

Which statement BEST explains why electrons orbit the nucleus rather than the other way around?

Accepted Answer

The proton has much greater mass than the electron, so the electron accelerates more.

Answer

The nucleus has a larger charge.

Answer

The electron has greater mass.

Answer

The nucleus spins faster.

Answer

The electron has no inertia.

Question 11

Which prefix represents one thousandth of a unit?

Accepted Answer

milli

Answer

centi

Answer

kilo

Answer

micro

Answer

nano

Question 12

How does gravitational force change when the distance between two objects is doubled?

Accepted Answer

The force becomes one-fourth as strong.

Answer

The force stays the same.

Answer

The force doubles.

Answer

The force triples.

Answer

The force becomes one-half as strong.

Question 13

Which fundamental force keeps protons together in the nucleus?

Accepted Answer

strong nuclear force

Answer

gravity

Answer

weak nuclear force

Answer

coulomb force

Answer

electromagnetic force

Question 14

What is the value of the gravitational constant G (in metric units)?

Accepted Answer

$$6.67 imes 10^{-11} N m^{2}/kg^{2}$$

Answer

$$6.67 imes 10^{-9} N m^{2}/kg^{2}$$

Answer

$$6.67 imes 10^{-6} N m^{2}/kg^{2}$$

Answer

$$6.67 imes 10^{-3} N m^{2}/kg^{2}$$

Answer

$$6.67 imes 10^{-13} N m^{2}/kg^{2}$$

Question 15

What type of field assigns both magnitude and direction to every point in space?

Accepted Answer

vector field

Answer

scalar field

Answer

static field

Answer

mass field

Answer

temperature field

Question 16

When you rub cloth on a glass rod, why does the glass rod become positively charged?

Accepted Answer

The glass rod loses electrons.

Answer

The glass rod gains protons.

Answer

The glass rod gains neutrons.

Answer

The glass rod loses protons.

Answer

The glass rod gains electrons.

Question 17

Which type of field is the wind over the surface of the Earth?

Accepted Answer

vector field

Answer

scalar field

Answer

magnetic field

Answer

gravitational field

Answer

electric field

Question 18

The symbol "g" represents what in the equation F_g = mg?

Accepted Answer

the strength of the gravitational field created by the Earth

Answer

the mass of the Earth

Answer

the object's weight

Answer

the gravitational force acting on the object

Answer

the force of the electric field

Question 19

How does the electric force F_E relate to the charge q and electric field E?

Accepted Answer

F_E = qE

Answer

F_E = mE

Answer

F_E = qq

Answer

F_E = q/E

Answer

$$F_E = kq/r^2$$

Question 20

Which statement below BEST explains what happens to the electric field at the point exactly between two protons that are the same distance apart?

Accepted Answer

It cancels out and becomes zero.

Answer

It doubles in strength.

Answer

It points to the right.

Answer

It points to the left.

Answer

It becomes negative.

Question 21

If the proton between the two positively charged spheres is nudged slightly forward (away from both spheres), what happens?

Accepted Answer

It moves forward because the forward components of the forces add together.

Answer

It stays still because the forces still cancel out.

Answer

It slows down but remains between the spheres.

Answer

It moves sideways randomly.

Answer

It oscillates back and forth between the spheres.

Question 22

Which of the following is the most accurate definition of a "particle"?

Accepted Answer

the smallest unit of an element that retains its chemical properties

Answer

the center of an atom, containing protons and neutrons

Answer

a type of energy that flows between atoms

Answer

the way that atoms resemble the solar system

Answer

a fundamental piece of matter from which everything else is made

Question 23

Which of the following BEST describes an electric dipole?

Accepted Answer

a pair of equal and opposite charges separated by a small distance

Answer

a single particle with a net positive charge

Answer

two particles with the same type of charge

Answer

a large group of randomly distributed positive and negative charges

Answer

a charge placed in the center of a conducting sphere

Question 24

How is the strength of a force measured?

Accepted Answer

in newtons

Answer

in kilograms

Answer

in meters

Answer

in joules

Answer

in volts

Question 25

If you hold a bucket upside down in the rain so that its opening is parallel to the falling rain, how much rain enters the bucket?

Accepted Answer

none at all

Answer

a lot of rain

Answer

half as much rain as usual

Answer

twice as much rain

Answer

some rain, but less than usual

Question 26

An object is acted on by two forces. Force 1 pulls on the object to the right and has a magnitude of 50 Newtons. Force 2 pulls on the object to the left with a magnitude of 30 Newtons. What is the net force on the object?

Accepted Answer

20 newtons to the right

Answer

80 newtons to the right

Answer

80 newtons to the left

Answer

20 newtons to the left

Answer

zero

Question 27

What happens when you rub two different materials, like cotton and acrylic, together in a dryer?

Accepted Answer

One becomes positive, the other negative.

Answer

Both become positive.

Answer

Both become neutral.

Answer

Both become negatively charged.

Answer

No charge exchange happens.

Question 28

Which statement BEST explains why your hairs stand on end after touching the metal sphere of a Van de Graff generator?

Accepted Answer

The strands become negatively charged and repel each other.

Answer

Gravity pulls the hair upward.

Answer

Air pressure forces the hair apart.

Answer

The strands become positively charged and attract each other.

Answer

Heat causes the hair to rise.

Question 29

Which of the following allows the excess charge from your body to move when you touch a metal doorknob after walking on a rug?

Accepted Answer

The metal provides a path for the charge to leave your body.

Answer

The rug creates a magnetic field.

Answer

The air insulates the charge.

Answer

Your socks become neutralized.

Answer

The doorknob absorbs heat.

Question 30

What does the example of hair rising due to static electricity illustrate about electric force?

Accepted Answer

It is stronger than gravity.

Answer

It is weaker than gravity.

Answer

It is equal to gravity.

Answer

It is the same strength as magnetic force.

Answer

It only works in a vacuum.

Question 31

A negatively-charged balloon would stick to a neutral wall because the

Accepted Answer

wall's atoms become polarized, creating a net attractive force

Answer

wall becomes positively charged when touched

Answer

balloon generates a magnetic field that holds it

Answer

wall absorbs the negative charge

Answer

wall creates friction that keeps the balloon in place

Question 32

What happens to the electrons in the wall's atoms when a negatively charged balloon is nearby?

Accepted Answer

The electrons are pushed away from the balloon

Answer

The electrons move randomly within the atom.

Answer

The electrons remain fixed in place

Answer

The electrons become positively charged

Answer

The electrons leave the atom entirely

Question 33

We get fewer static shocks on humid days because

Accepted Answer

water molecules in the air attract ions, reducing charge buildup

Answer

the air becomes more positively charged

Answer

the water molecules create a shield around you

Answer

humidity causes objects to lose all charge

Answer

the air becomes an insulator

Question 34

Which feature of water molecules makes them good at collecting substances when washing?

Accepted Answer

They are naturally polarized due to their chemical bonds.

Answer

They are always negatively charged.

Answer

They have no electric charge at all.

Answer

They are magnetic.

Answer

They conduct electricity easily.

Question 35

During a dry winter day, you build up 0.000002 C of negative charge by walking on a rug. When you touch a metal doorknob, what is most likely to happen?

Accepted Answer

You feel a small shock as the charge moves into the metal.

Answer

Nothing, because the charge stays on your body.

Answer

The doorknob gains a positive charge.

Answer

The charge makes the doorknob move.

Answer

The charge makes your hand feel cold.

Question 36

Copper is commonly used in electrical wires because it ____________________.

Accepted Answer

is a good conductor because its outer electrons move freely

Answer

is lightweight and flexible

Answer

prevents heat from escaping

Answer

has no electrons in its outer shell

Answer

is an insulator that blocks electricity

Question 37

If you add extra electrons to a metal sphere, where will these extra electrons end up?

Accepted Answer

evenly distributed on the sphere's surface

Answer

spread throughout the inside of the sphere

Answer

clustered at the center of the sphere

Answer

gathered at one corner of the sphere

Answer

concentrated at the bottom of the sphere due to gravity

Question 38

A car struck by lightning protects the passengers inside mainly because the

Accepted Answer

metal frame acts as a Faraday cage with zero electric field inside

Answer

windows block the electricity

Answer

tires absorb the lightning

Answer

car's paint deflects the charge

Answer

steering wheel is made of plastic

Question 39

Which statement BEST supports how a lightning rod works during a thunderstorm?

Accepted Answer

The pointed tip creates a high charge density that attracts lightning.

Answer

The flat metal surface disperses the charge.

Answer

The rod absorbs water and prevents lightning.

Answer

The rod's wooden base repels electric charge.

Answer

The rod blocks rain, which carries the lightning.

Question 40

What happens to the electric field inside a charged conductor?

Accepted Answer

It is zero everywhere inside.

Answer

It becomes stronger at the center.

Answer

It points toward the surface.

Answer

It increases near the corners.

Answer

It circles around the outer edges.

Question 41

Objects like microwave ovens or cars are able to protect their contents from electromagnetic radiation because

Accepted Answer

their metal structure acts as a Faraday cage

Answer

they have plastic walls

Answer

they use rubber seals to block radiation

Answer

they are grounded with wires

Answer

they contain cooling systems

Question 42

A metal sphere is given a negative charge of 5 microcoulombs. Where will the added electrons move to minimize their repulsion?

Accepted Answer

spread out evenly on the surface

Answer

to the center of the sphere

Answer

to a dense cluster at one point on the sphere

Answer

remain near the bottom of the sphere

Answer

stationary in the location where they were added

Question 43

Two electrons are placed near each other in space. Which statement describes the forces between them?

Accepted Answer

They repel each other with a force much stronger than gravity.

Answer

They attract each other with a force stronger than gravity.

Answer

They repel each other with a force equal to gravity.

Answer

They attract each other with a force much stronger than gravity.

Answer

They feel no force because they have equal charge.

Question 44

We do not feel strong electric forces from the objects around us in daily life because _________________

Accepted Answer

most objects are electrically neutral overall

Answer

electric forces do not exist in nature

Answer

all objects are positively charged

Answer

electric forces are weaker than gravitational forces

Question 45

Jupiter is about 5 times farther from the Sun than Earth is. According to the inverse square law, how much sunlight does Jupiter receive compared to Earth?

Accepted Answer

one-twenty-fifth the amount

Answer

the same amount

Answer

one-fifth the amount

Answer

one-tenth the amount

Answer

one-fiftieth the amount

Question 46

Which of the following is an example of a scalar field?

Accepted Answer

temperature at different positions across the United States

Answer

wind direction across the United States

Answer

velocity of a moving car

Answer

electric field around a charged particle

Answer

magnetic field near a magnet

Question 47

You are assigned to design an electrical circuit from copper and plastic components. Why would you use copper for the wires and plastic for the outer covering?

Accepted Answer

Copper allows electric charges to flow freely, while plastic protects by preventing electric flow.

Answer

Plastic conducts electricity better than copper.

Answer

Copper is cheaper than plastic.

Answer

Plastic is heavier than copper.

Answer

Plastic can heat up and conduct electricity better than copper.

Science Prac. Test sec. 1

60 questions

Who first called the mysterious force produced by rubbing materials the “electric force”?

What is the meaning of the Greek word “atom”?

According to ancient Western thought, which of the following was NOT one of the four basic elements?

What do we now know about the elements on the Periodic Table?

What did some ancient philosophers believe about dividing matter?

Benjamin Franklin's experiments with the key and thunderstorm demonstrated which of the following?

Which particle plays no role in electricity because it has no electric charge?

Which type of charge does an electron have?

According to Newton's third law of motion, what happens when one object exerts a force on another?

What is the mass of a typical adult human?

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