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CIDESCO QUESTIONS (NATURAL SCIENCES PORTION) WITH CORRECT ANSWERS
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CIDESCO QUESTIONS (NATURAL SCIENCES PORTION) WITH CORRECT ANSWERS
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CIDESCO QUESTIONS (NATURALSCIENCES PORTION) WITH CORRECT
ANSWERS
which is correct?
1. anatomy is a very important science in the field of biology
2. anatomy is the science which deals with the functions of the human body - ANSWER-
1 is correct and 2 is incorrect
which science does the alteration of the structure of molecules belong to? - ANSWER-
Chemistry
the field of physics includes - ANSWER-heat and electricity
an Anion is - ANSWER-a negatively charged atom
A cation is - ANSWER-a positively charged atom
an electrolyte is - ANSWER-a substance that when dissolved in water splits into ions
examples of electrolytes are - ANSWER-acids and salts
an example of an electrolyte is - ANSWER-a salt solution
an acid is an electrolyte because - ANSWER-it can conduct electric current
an example of an inorganic acid is - ANSWER-sulphuric acid
an alkali must contain - ANSWER-metal atoms and hydroxyl groups (OH)
an example of an alkaline substance is - ANSWER-soap
if a metal-oxide is dissolved in water it forms - ANSWER-an alkali
pH can be decreased by - ANSWER-increasing hydrogen-ions
the letter p in pH means - ANSWER-potential
pH is... - ANSWER-the number of free H-ions in a solution
if the pH of a solution is between 5 and 7, the solution is a - ANSWER-weak acid
if the pH of a solution is between 1 and 3, the solution is a - ANSWER-strong acid
, if the pH of a solution is between 7 and 9 the solution is a - ANSWER-weak alkali
if the pH of a solution is between 12 and 14 the solution is a - ANSWER-strong alkali
the pH of distilled water is - ANSWER-7
Lemon juice, with a pH reading of about 2, is considered to be - ANSWER-acid
pure water, with a pH of 7 is considered to be - ANSWER-neutral
substances having a pH value above 9.5 are considered to be - ANSWER-alkaline
the pH of the skins acid mantle is - ANSWER-4.5-5.5
a characteristic of a weak acid is that it - ANSWER-supports the natural pH of the skin
a characteristic of a weak alkali is that it - ANSWER-softens the stratum corneum of the
skin
the effect of a strong acid is - ANSWER-corrosive and of no use in beauty therapy
a characteristic of organic acids is that - ANSWER-they contain the element carbon
organic acids are found in - ANSWER-sebum and plants
an organic acid contains the chemical-group - ANSWER-COOH
an anode is - ANSWER-Positively charged electrode
a cathode is - ANSWER-Negatively charged electrode
examples of electrodes which are used in beauty therapy are - ANSWER-the needles
used for galvanic electrolysis
in physics, radiation means - ANSWER-the electro-magnetic waves in space
the unit of frequency is - ANSWER-Hertz
in physics, frequency means - ANSWER-the number of times per second an electro-
magnetic-wave can change direction
the unit of frequency is - ANSWER-Hertz
Hertz is a unit of - ANSWER-frequency
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