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science 8 first

Total questions: 37

Worksheet time: 19mins

Name
Class
Date
1.

refers to the size or strength of the force

a)

magnitude

b)

direction

c)

point of application

d)

line of action

2.

– points to where the object goes.

a)

point of application

b)

line of action

c)

direction

d)

magnitude

3.

the location of where the force is applied.

a)

point of application

b)

line of action

c)

direction

d)

magnitude

4.

– forces where objects touch or contact with each other

a)

contact forces

b)

friction

c)

normal

5.

– is the force acting against or opposite an object in contact with

which makes the movement of the object slow down.

a)

normal

b)

friction

c)

applied

d)

contact forces

6.

is the force that acts perpendicular to the surface of the object in

contact with

a)

normal

b)

friction

c)

applied

7.

– is the force applied to an object.

a)

tension

b)

gravitational

c)

noncontact forces

8.

forces where objects do not touch or contact with each other.

a)

contact forces

b)

non contact forces

c)

magnetic

9.

is the force of attraction between two objects.

a)

gravitational

b)

magnetic

c)

balance forces

10.

are forces exerted on a field of attraction or repulsion as in the

case of magnets and other magnetic materials.

a)

magnetic

b)

balance forces

c)

non balance forces

11.

Forces that are equal in magnitude but opposite in direction are called

a)

unbalanced forces

b)

friction

c)

gravity

d)

balance forces

12.

Forces that cause a change in the motion of an object are

a)

net force

b)

unbalance forces

c)

balance forces

13.

e is the sum of all forces acting on an object.

a)

resultant force

b)

gravity

c)

flexibility

14.

what is the first law of motion?

a)

gravitational force

b)

law of interaction

c)

law of inertia

d)

law of acceleration

15.

what is the second law of motion

a)

law of inertia

b)

law of acceleration

c)

law of interaction

16.

what is the third law of motion

a)

law of acceleration

b)

law of inertia

c)

law of interaction

17.

The tendency of an object to maintain its

state of rest or of uniform velocity in a straight line is called

a)

interaction

b)

inertia

c)

acceleration

d)

speed

18.

The energy that the body gains or losses with respect

to its position is called

a)

potential energy

b)

kinetic energy

c)

gravitational energy

d)

magnetic energy

19.

The energy of a moving object is called

a)

kinetic energy

b)

gravitational energy

c)

potential energy

d)

magnetic energy

20.

other name for kinetic energy

a)

energy of speed

b)

energy of motion

c)

energy of attraction

21.

is the ability of a material to return to its original form after a

certain amount of force has been applied to it.

a)

elasticity

b)

malleability

c)

sound wave

d)

solidify

22.

is an intrinsic property that is determined by the amount of mass

per area of space or volume of the material.

a)

elasticity

b)

density

c)

temperature

d)

vibration

23.

usually described as the turning back of the wave as it hits a barrier.

a)

reflection

b)

reverberation

c)

echo sounding

24.

refers to multiple

reflections or echoes in a certain place.

a)

reverberation

b)

echo sounding

c)

sound reflection

25.

This is used by

scientists to map the seafloor and to determine the depth of the ocean or sea.

a)

echo sounding

b)

reverberation

c)

vibration

26.

is a kind of

refraction which provided us colors of light. This phenomenon is observed when

white light passes through a prism.

a)

dispersion

b)

prism

c)

frequency

27.

is a transparent optical element with flat and polished surfaces that

disperses light.

a)

prism

b)

dispersion

c)

spectrum

28.

the SI unit of heat

a)

Joule

b)

celsius

c)

fahrenheit

29.

introduced the third

temperature scale which is called kelvin.

a)

William Thompson

b)

isaaac newton

c)

george mendel

d)

Dimitri mendelev

30.

is the rate of flow of electric charges from one point to

another in a circuit.

a)

electric current

b)

frequency

c)

coulomb

31.

Electric current is measured by

a)

Amperes

b)

coulomb

c)

second

d)

time

32.

what is the standard unit of electric charge

a)

coulomb

b)

amperes

c)

power

33.

The work needed

per unit charge to move between two points is called

a)

voltage

b)

amperes

c)

coulomb

34.

is the opposition to the flow of current by the

conducting wire.

a)

electrical resistance

b)

conduction

c)

convection

d)

current resistant

35.

A closed loop through which current can flow is called

a)

electric circuit

b)

wires

c)

connectors

d)

transformers

36.

is a device that maintains a constant amount of voltage.

Common voltage sources used at home are battery, generator, wall socket, and

electric outlet

a)

voltage source

b)

conducting wires

c)

electrical switch

d)

electrical load

37.

are special kind of conductors where current can pass

through easily

a)

conducting wires

b)

voltage source

c)

electrical switch

d)

electrical load