Cidesco Questions( 123 questions and answered) with complete solutions A+ GRADED..
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Course
Cidesco
Institution
Cidesco
Cidesco Questions( 123 questions and answered)
with complete solutions A+ GRADED..
I Biological and non-biological substances both need oxygen for their existence. II
The human body consists only of biological substances. - CORRECT ANSWER--I is
correct and II is incorrect
Characteristics of...
Cidesco Questions( 123 questions and answered)
with complete solutions A+ GRADED..
I Biological and non-biological substances both need oxygen for their existence. II
The human body consists only of biological substances. - CORRECT ANSWER--I is
correct and II is incorrect
Characteristics of life include: - CORRECT ANSWER--growth and metabolism
Examples of synthetic substances are: - CORRECT ANSWER--plastics and
silicones
Examples of organic biological substances are: - CORRECT ANSWER--
carbohydrates and fats
Examples of mineral substances are: - CORRECT ANSWER--paraffins and
petroleum
Matter is everything that: - CORRECT ANSWER--occupies space and has weight
The three forms of matter are solids, liquids and: - CORRECT ANSWER--gases
What property does all matter have? - CORRECT ANSWER--All matter has weight
Condensation is the change of matter from: - CORRECT ANSWER--a gas to a liquid
Vapourisation is the change of matter from: - CORRECT ANSWER--liquid to a gas
Melting is the change of matter from: - CORRECT ANSWER--a solid to a liquid
Sublimation is the change of matter from: - CORRECT ANSWER--a solid to a gas
Condensation is: - CORRECT ANSWER--the change of a vapour to a liquid
The alteration of the properties of matter without the formation of any new substance
is called a/an: - CORRECT ANSWER--physical change
The immediate change of a solid into a vapour is called: - CORRECT ANSWER--
sublimation
An example of a single-celled cellular organism is: - CORRECT ANSWER--a
bacterium
I. A micro-organism is the smallest part of the human body. II All micro-organisms
need nutrients for their existence. - CORRECT ANSWER--I is incorrect and II is
correct
Examples of bacteria are: - CORRECT ANSWER--bacilli and cocci
,I. Every living organism needs some non-biological substances for it's existence. II.
All non-biological substances are found as minerals in the earth. - CORRECT
ANSWER--I is correct and II is incorrect
Science deals mainly with: - CORRECT ANSWER--physics and chemistry
The study of the structure of the body is called: - CORRECT ANSWER--anatomy
The study of the functions of living organisms is: - CORRECT ANSWER--physiology
I Anatomy is a very important science in the field of biology. II Anatomy is the
science which deals with the functions of the human body. - CORRECT ANSWER--I
is correct and II is incorrect
I Physiology is a very important science in the field of biology. II Physiology is the
science which deals with the functions of the body. - CORRECT ANSWER--I and II
are both correct
Which one of the following belongs to the science of chemistry? - CORRECT
ANSWER--The alteration of the structure of molecules
I Chemical reactions only take place outside and not inside a living organism. II The
structure of molecules change during chemical reactions. - CORRECT ANSWER--I
is incorrect and II is correct
The field of physics includes: - CORRECT ANSWER--heat and electricity
Which one of the following belongs to the field of physics? - CORRECT ANSWER--
Sound, electricity and heat
The field of physics includes: - CORRECT ANSWER--the science of electricity
An anion is: - CORRECT ANSWER--A negatively charged atom
An anion is: - CORRECT ANSWER--a negatively charged chloride atom (CI-)
A cation is: - CORRECT ANSWER--A positively charged sodium atom (Na+)
An electrolyte is: - CORRECT ANSWER--A substance which, dissolved in water,
splits into ions
Examples of electrolytes are: - CORRECT ANSWER--acids and salts
An example of an electrolyte is: - CORRECT ANSWER--salt-solution
An acid is an electrolyte because: - CORRECT ANSWER--it can conduct an electric
current
An example of an inorganic acid is: - CORRECT ANSWER--sulphuric acid
,An alkali must contain: - CORRECT ANSWER--metal atoms and hydroxyl group(s)
(OH)
An example of an alkaline substance is: - CORRECT ANSWER--soap
If a metal-oxide is dissolved in water it forms: - CORRECT ANSWER--an alkali
The pH scale is used to measure the degree of acidity or: - CORRECT ANSWER--
alkalinity
pH can be decreased by: - CORRECT ANSWER--increasing hydrogen-ions
The letter p in pH means: - CORRECT ANSWER--potential
pH is: - CORRECT ANSWER--the number of free H-ions in solution
If the pH of a solution is between 5 and 7, the solution is a: - CORRECT ANSWER--
weak acid
If the pH of a solution is between 1 and 3 the solution is a: - CORRECT ANSWER--
strong acid
If the pH of a solution is between 7 and 9 the solution is a: - CORRECT ANSWER--
weak alkali
If the pH of a solution is between 12 and 14 the solution is: - CORRECT ANSWER--
strong alkali
The pH of distilled water is: - CORRECT ANSWER--7
Lemon juice, with a pH reading of about 2, is considered to be: - CORRECT
ANSWER--acid
Pure water, with a pH of 7, is considered to be: - CORRECT ANSWER--neutral
Substances having a pH value above 9.5 are considered to be: - CORRECT
ANSWER--alkaline
The pH of the skin's acid mantle is: - CORRECT ANSWER--5.5
A characteristic of a weak acid is that it: - CORRECT ANSWER--supports the natural
pH of the skin
A characteristic of a weak alkali is that it: - CORRECT ANSWER--softens the
stratum corneum of the skin
The effect of a strong acid is: - CORRECT ANSWER--corrosive and therefore of no
use in beauty therapy
, A characteristic of organic acids is that: - CORRECT ANSWER--they contain the
element carbon (C)
Organic acids are found in: - CORRECT ANSWER--sebum and plants
An organic acid contains the chemical-group: - CORRECT ANSWER--COOH
An anode is: - CORRECT ANSWER--A positively charged electrode
A cathode is: - CORRECT ANSWER--A negatively charged electrode
Examples of electrodes which are used in beauty therapy are: - CORRECT
ANSWER--the needles used for galvanic electrolysis
In physics, radiation means: - CORRECT ANSWER--the electro-magnectic waves in
space system
The unit of frequency is: - CORRECT ANSWER--Hertz
In physics, frequency means: - CORRECT ANSWER--the number of times per
second an electro-magnetic-wave can change direction
The unit of frequency is: - CORRECT ANSWER--Hertz
Hertz is a unit of: - CORRECT ANSWER--frequency
In the visible spectrum the colours in the correct order are: - CORRECT ANSWER--
red, orange, yellow and green
In the visible spectrum the colours in the correct order are: - CORRECT ANSWER--
green, blue, indigo and violet
Invisible rays which can be used in beauty therapy are: - CORRECT ANSWER--
infra-red and ultra-violet rays
Infra-red radiation: - CORRECT ANSWER--is invisible and can be felt
Infra-red radiation is absorbed: - CORRECT ANSWER--in the dermis and muscles
Infra-red rays can be used in beauty therapy for: - CORRECT ANSWER--warming
The effect of infra-red rays on the skin is to: - CORRECT ANSWER--warm the
deeper layers of the skin
An indication for a treatment with infra-red rays is: - CORRECT ANSWER--a poor
blood circulation in the skin
A contra-indication to treatment with infra-red radiation is: - CORRECT ANSWER--
skin showing teleangiectasias on the cheek area
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