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I Biological and non-biological substances both need oxygen for their existence. II The
human body consists only of biological substances. - ansI is correct and II is incorrect
Characteristics of life include: - ansgrowth and metabolism
Examples of synthetic substances are: - ansplastics and silicones
Examples of organic biological substances are: - anscarbohydrates and fats
Examples of mineral substances are: - ansparaffins and petroleum
Matter is everything that: - ansoccupies space and has weight
The three forms of matter are solids, liquids and: - ansgases
What property does all matter have? - ansAll matter has weight
Condensation is the change of matter from: - ansa gas to a liquid
Vapourisation is the change of matter from: - ansliquid to a gas
Melting is the change of matter from: - ansa solid to a liquid
Sublimation is the change of matter from: - ansa solid to a gas
Condensation is: - ansthe 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: - ansphysical change
The immediate change of a solid into a vapour is called: - anssublimation
An example of a single-celled cellular organism is: - ansa bacterium
I. A micro-organism is the smallest part of the human body. II All micro-organisms need
nutrients for their existence. - ansI is incorrect and II is correct
Examples of bacteria are: - ansbacilli 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. - ansI is correct and II is incorrect
Science deals mainly with: - ansphysics and chemistry
The study of the structure of the body is called: - ansanatomy
The study of the functions of living organisms is: - ansphysiology
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. - ansI 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. - ansI and II are both correct
Which one of the following belongs to the science of chemistry? - ansThe 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. - ansI is incorrect and II is correct
The field of physics includes: - ansheat and electricity
Which one of the following belongs to the field of physics? - ansSound, electricity and heat
The field of physics includes: - ansthe science of electricity
An anion is: - ansA negatively charged atom
An anion is: - ansa negatively charged chloride atom (CI-)
A cation is: - ansA positively charged sodium atom (Na+)
An electrolyte is: - ansA substance which, dissolved in water, splits into ions
Examples of electrolytes are: - ansacids and salts
An example of an electrolyte is: - anssalt-solution
An acid is an electrolyte because: - ansit can conduct an electric current
