CIDESCO Exam Prep Questions with correct Answers (Graded A)

CIDESCO Exam Prep Questions with correct Answers (Graded A)
I Biological and non-biological substances both need oxygen for their existence. II The
human body consists only of biological substances. - Answer- I is correct and II is
incorrect
Characteristics of life include: - Answer- growth and metabolism
Examples of synthetic substances are: - Answer- plastics and silicones
Examples of organic biological substances are: - Answer- carbohydrates and fats
Examples of mineral substances are: - Answer- paraffins and petroleum
Matter is everything that: - Answer- occupies space and has weight
The three forms of matter are solids, liquids and: - Answer- gases
What property does all matter have? - Answer- All matter has weight
Condensation is the change of matter from: - Answer- a gas to a liquid
Vapourisation is the change of matter from: - Answer- liquid to a gas
Melting is the change of matter from: - Answer- a solid to a liquid
Sublimation is the change of matter from: - Answer- a solid to a gas
Condensation is: - 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: - Answer- physical change
The immediate change of a solid into a vapour is called: - Answer- sublimation
An example of a single-celled cellular organism is: - Answer- a bacterium
I. A micro-organism is the smallest part of the human body. II All micro-organisms need
nutrients for their existence. - Answer- I is incorrect and II is correct
Examples of bacteria are: - 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. - Answer- I is correct and
II is incorrect
Science deals mainly with: - Answer- physics and chemistry
The study of the structure of the body is called: - Answer- anatomy
The study of the functions of living organisms is: - 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. - 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. - Answer- I and II are both correct
Which one of the following belongs to the science of chemistry? - 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. - Answer- I is incorrect and II
is correct
The field of physics includes: - Answer- heat and electricity
Which one of the following belongs to the field of physics? - Answer- Sound, electricity
and heat
The field of physics includes: - Answer- the science of electricity
An anion is: - Answer- A negatively charged atom
An anion is: - Answer- a negatively charged chloride atom (CI-)
A cation is: - Answer- A positively charged sodium atom (Na+)
An electrolyte is: - Answer- A substance which, dissolved in water, splits into ions
Examples of electrolytes are: - Answer- acids and salts
An example of an electrolyte is: - Answer- salt-solution
An acid is an electrolyte because: - Answer- it can conduct an electric current

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