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introduction to physics

Total questions: 40

Worksheet time: 27mins

Name
Class
Date
1.

In what way is a scientific law different from a scientific theory?

a)

A law describes a pattern between two or more variables, while a theory explains why something happens.

b)

A law is true in all situations, while a theory is only true in some situations.

c)

A law describes the major ideas of the universe, while theories are based on smaller ideas of the universe.

d)

A law is based on testable facts and data, while a theory is just a combination of one or more hypotheses that still need to be tested.

2.

When is a hypothesis written?

a)

before you decide on a question

b)

after the experiment

c)

before the experiment

d)

after the conclusion

3.

An explanation that has not yet been proven.

a)

Hypothesis

b)

Theory

c)

Law

4.

A well proven explanation for a set of observations.

a)

Hypothesis

b)

Theory

c)

Law

5.

What is the SI unit of electric current?

a)

Ampere (A)

b)

Volt (V)

c)

Ohm

d)

Mole

6.

What is the DIMENSION of length?

a)

[M]

b)

[L]

c)

[T]

d)

[l]

7.

Which one of these options is NOT a derived quantity?

a)

Area

b)

Volume

c)

Density

d)

Temperature

8.

What is the SI unit of speed?

a)

m/s

b)

cm/s

c)

km/hour

d)

kg/m

9.

1 nm (nano-meter) = .... m

a)

1 x 10-12

b)

1 x 109

c)

1 x 10-9

d)

1 x 1012

10.

What is the DIMENSION of acceleration?

a)

L3

b)

[L/T]

c)

[L/T2]

d)

LT

11.
Which of the following quantity is base quantity ?
a)
voltage
b)
electric current
c)
electric energy
d)
electric power
12.
Which of the following pairs of physical quantity and SI unit is correct ?
a)
Mass - SI unit : Gram
b)
Time - SI unit : Hour
c)
Electric current - SI unit : Volt
d)
Temperature - SI unit : Kelvin
13.

What is the SI unit of weight?

a)

kilograms

b)

grams

c)

newtons

d)

kg

14.

What is the unit of DENSITY

a)

m/s

b)

m/s2

c)

kg/m3

d)

Newton

15.

What is the SI unit for Work

a)

Joule/s

b)

Joule

c)

Newton

d)

Pascal

16.

What is the couple of quantities have a same unit?

a)

Energy and force

b)

Energy and Work

c)

Energy and power

d)

Work and power

17.

Choose all the base quantities below :

a)

Length

b)

Area

c)

Mass

d)

Volume

e)

Time

18.

Which are the derived quantities below?

a)

Electric current

b)

Density

c)

Force

d)

Luminous intensity

e)

Weight

19.

Which one is derived quantity?

a)

Area

b)

Time

c)

Electric Current

d)

Length

20.

Vector or Scalar?

A deer running 15 meters per second due west.

a)
Scalar
b)
Vector
21.
Which symbol is used to show vector quantities?
a)
Circle
b)
Line
c)
Arrow
d)
Triangle
22.
A quantity that has both magnitude and direction is called a scalar quantity.
a)
True
b)
False
23.

Select the scalar quantities.

a)

velocity

b)

distance

c)

energy

d)

acceleration

e)

speed

24.

An example of scalar magnitude:

a)

velocity

b)

mass

c)

acceleration

d)

force

25.
Which of these is not a vector quantity? 
a)
displacement 
b)
time
c)
velocity 
d)
acceleration
26.

DISTANCE

a)

Scalar

b)

Vector

27.

VELOCITY

a)

Scalar

b)

Vector

28.

WEIGHT

a)

Scalar

b)

Vector

29.
Convert from meters to cm:  9 meters
a)
900 cm
b)
90 cm
c)
0.9 cm
d)
0.09 cm
30.
Convert 17 m to cm:
a)
0.17 cm
b)
0.017 cm
c)
1,700 cm
d)
170 cm
31.
240 cm = ___________ m
a)
2400
b)
24
c)
2.4
d)
0.24
32.
If an eraser is 25 millimeters long, how many centimeters long is it?
a)
2
b)
2.5
c)
25
d)
250
33.
Which unit is the smallest?  
a)
km
b)
mm
c)
m
d)
cm 
34.
32.9 km = ___________ cm
a)
32,900
b)
329,000
c)
3,290,000
d)
32,900,000
35.
1000 grams = _____ kilograms
a)
0.0001
b)
1,000,000
c)
10
d)
1
36.

What is the symbol for the prefix kilo-?

a)

L

b)

m

c)

k

d)

kg

37.

Which options shows the correct conversion between grams and milligrams?

a)

85g = 8500mg

b)

85g = 8.5mg

c)

85g = .85mg

d)

85g = 85000mg

38.

Name the SI unit of mass.

a)

gram

b)

milligram

c)

kilogram

d)

tonne

39.

3min = (a)   sec

40.

1 hour is equal to ________ seconds

a)

60

b)

360

c)

3600

d)

180

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