Base Unit,Derived Units, homogeneity equations

Match

Match the following

• $$10^{12}$$

• $$10^9$$

• $$10^6$$

• $$10^3$$

• $$10^{-1}$$

terra (T)

giga (G)

mega (M)

kilo (k)

deci

• terra (T)

• giga (G)

• mega (M)

• kilo (k)

• deci

1. Physical quantities and units

Learning outcomes

1.1 Physical quantities

1

understand that all physical quantities consist of a numerical magnitude and a unit

2

make reasonable estimates of physical quantities included within the syllabus

1.2 S.I Units

1

recall the following SI base quantities and their units: mass (kg), length (m), time (s), current (A),temperature (K)

express derived units as products or quotients of the SI base units and use the derived units for quantities listed
in this syllabus as appropriate

3

use SI base units to check the homogeneity of physical equations

recall and use the following prefixes and their symbols to indicate decimal submultiples or multiples of both base
and derived units: pico (p), nano (n), micro (μ), milli (m), centi (c), deci (d), kilo (k), mega (M),giga (G), tera (T)

2

4

Open Ended

Write down the names of as many physical quantities as you can

This shows you all the prefixes and the symbols they use. 

Dropdown

A physical quantity consists of a(n) ​

Select answer

and a(n)​ ​

Select answer

.

Labeling

Label each of the base physical quantities shown in the picture

Drag labels to their correct position on the image

time

length

luminous intensity

temperature

amount of substance

electric current

mass

Reorder

Reorder the following prefixes from smallest to largest

• pico

• centi

• nano

• micro

• milli

1

2

3

4

5

• 1
• 2
• 3
• 4
• 5

Reorder

Reorder the following prefixes from smallest to largest

• deci (d)

• kilo (k)

• mega (M)

• giga (G)

• tera (T)

1

2

3

4

5

• 1
• 2
• 3
• 4
• 5

Match

Match the following

• $$10^{12}$$

• $$10^9$$

• $$10^6$$

• $$10^3$$

• $$10^{-1}$$

terra (T)

giga (G)

mega (M)

kilo (k)

deci

• terra (T)

• giga (G)

• mega (M)

• kilo (k)

• deci

Match

Match the following

• $$10^{-3}$$

• $$10^{-2}$$

• $$10^{-6}$$

• $$10^{-12}$$

• $$10^{-9}$$

milli (m)

centi (c)

micro (u)

pico (p)

nano (n)

• milli (m)

• centi (c)

• micro (u)

• pico (p)

• nano (n)

Hotspot

Select the SI base Unit for the physical quantity:

length

Hotspot

Select the SI base Unit for the physical quantity:

Temperature

Hotspot

Select the SI base Unit for the physical quantity:

Mass

Hotspot

Select the SI base Unit for the physical quantity:

Time

Hotspot

Select the SI base Unit for the physical quantity:

amount of substance

Hotspot

Select the SI base Unit for the physical quantity:

current

Hotspot

Select the SI base Unit for the physical quantity:

Luminous intensity

Multiple Choice

What is base quantities ?

• the branch of science concerned with the nature and properties of matter and energy

• the branch of science that deals with the identification of the substances of which matter is composed

• physical quantities that cannot be defined in terms of other physical quantities

Multiple Choice

What is derived quantities ?

• a tendency to do nothing or to remain unchanged.

• combination of two or more base quantities

• the quantity of motion of a moving body, measured as a product of its mass and velocity.

Multiple Choice

Which of the following pairs of physical quantity and SI unit is correct ?

• Mass - SI unit : Gram

• Time - SI unit : Hour

• Electric current - SI unit : Volt

• Temperature - SI unit : Kelvin

Multiple Choice

What is the SI unit for Work? Given  $$Work=Force\times Dispplacement$$  

• Joule/s

• Joule

• Newton

• Pascal

Multiple Choice

Which of the following quantity is base quantity ?

• voltage

• electric current

• electric energy

• electric power

Multiple Choice

Speed can be defined as the distance in a unit meter (m) divided by time in unit seconds (s).

What is the SI unit of speed?

• m/s

• cm/s

• km/hour

• kg/m

Multiple Choice

Force has a SI base units of kg m s^-2.

Area has a SI base units of m².

What is the SI base units of pressure?

(pressure = force / area)

• kg m^-2 s^-2

• kg m^-1 s^-2

• kg m² s^-2

• kg m³ s^-2

Multiple Choice

Mass has a SI unit of kg.

Gravitational acceleration has a SI base units of m s^-2.

Height has a SI unit of m.

What is the SI base units of gravitational potential energy?

(gravitational potential energy = mass x grav. acceleration x height)

• kg m^-2 s^-2

• kg m^-1 s^-2

• kg m² s^-2

• kg m³ s^-2

Multiple Choice

Which statement is correct about physical quantities?

• Quantities that can be combined.

• Quantities that can be described.

• Quantities that can be measured.

• Quantities that can be expressed.