CIDESCO Practice Questions V2
Which statements are correct?
1. Every living organism needs some non-biological substances for its existence.
2. All non-biological substances are found as minerals in the earth.
1 and 2 are incorrect
Characteristics of life include?
Growth and Metabolism
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Examples of organic biological substances are?
Carbohydrates and Fats
Examples of minerals substances are?
Paraffins and Petroleum
Matter is everything that?
Occupies space and has weight
Condensation is the change of matter from?
A gas to a liquid
,Vaporization is the change of matter from?
A liquid to a gas
Melting is the change of matter from?
A solid to a liquid
Sublimation is the change of matter from?
A solid to a gas
Condensation is?
The change of a vapour to a liquid
An example of a single-celled cellular organism is?
A bacterium
Which are correct?
1. A micro-organism is the smallest part of the human body.
2. All micro-organisms need nutrients for their existence
1 is incorrect, 2 is correct
Science deals mainly with?
Physics and chemistry
The study of the functions of living organisms is?
Physiology
Which are 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.
,1. is correct
2. is incorrect
Which are correct?
1. Physiology is very important science in the field of biology.
2. Physiology is the science which deals with the functions of the body
1 and 2 are correct
Which one of the following belongs to the science of chemistry?
The alteration of the structure of molecules
Which are correct?
1. Chemical reactions only take place outside and not inside a living organism.
2. The structure of molecules change during chemical reactions.
1. is incorrect
2. is correct
The field of physics includes?
heat and electricity
An anion is a?
Negatively charged atom
A cation is a?
Positively charged sodium atom (Na+)
An electrolyte is a?
salt-solution
An acid is an electrolyte because?
it can conduct an electric current
, pH can be decreased by?
increasing hydrogen-ions
pH is?
the number of free h-ions in a solution
If the pH of a solution is between 5 and 7, the solution is a?
Weak Acid
If the pH of a solution is between 7 and 9, the solution is a?
Weak Alkali
The pH of distilled water is?
7
Lemon juice, with a pH reading of about 2, is considered to be?
Acidic
Substances having a pH value above 9.5 are considered to be?
Alkaline
The pH of the skin's acid mantle is?
5.5
A characteristic of a weak acid is that it?
Supports the natural pH of the skin
A characteristic of organic acids is that?
Which statements are correct?
1. Every living organism needs some non-biological substances for its existence.
2. All non-biological substances are found as minerals in the earth.
1 and 2 are incorrect
Characteristics of life include?
Growth and Metabolism
Previous
Play
Next
Rewind 10 seconds
Move forward 10 seconds
Unmute
0:03
/
0:15
Full screen
Brainpower
Read More
Examples of organic biological substances are?
Carbohydrates and Fats
Examples of minerals substances are?
Paraffins and Petroleum
Matter is everything that?
Occupies space and has weight
Condensation is the change of matter from?
A gas to a liquid
,Vaporization is the change of matter from?
A liquid to a gas
Melting is the change of matter from?
A solid to a liquid
Sublimation is the change of matter from?
A solid to a gas
Condensation is?
The change of a vapour to a liquid
An example of a single-celled cellular organism is?
A bacterium
Which are correct?
1. A micro-organism is the smallest part of the human body.
2. All micro-organisms need nutrients for their existence
1 is incorrect, 2 is correct
Science deals mainly with?
Physics and chemistry
The study of the functions of living organisms is?
Physiology
Which are 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.
,1. is correct
2. is incorrect
Which are correct?
1. Physiology is very important science in the field of biology.
2. Physiology is the science which deals with the functions of the body
1 and 2 are correct
Which one of the following belongs to the science of chemistry?
The alteration of the structure of molecules
Which are correct?
1. Chemical reactions only take place outside and not inside a living organism.
2. The structure of molecules change during chemical reactions.
1. is incorrect
2. is correct
The field of physics includes?
heat and electricity
An anion is a?
Negatively charged atom
A cation is a?
Positively charged sodium atom (Na+)
An electrolyte is a?
salt-solution
An acid is an electrolyte because?
it can conduct an electric current
, pH can be decreased by?
increasing hydrogen-ions
pH is?
the number of free h-ions in a solution
If the pH of a solution is between 5 and 7, the solution is a?
Weak Acid
If the pH of a solution is between 7 and 9, the solution is a?
Weak Alkali
The pH of distilled water is?
7
Lemon juice, with a pH reading of about 2, is considered to be?
Acidic
Substances having a pH value above 9.5 are considered to be?
Alkaline
The pH of the skin's acid mantle is?
5.5
A characteristic of a weak acid is that it?
Supports the natural pH of the skin
A characteristic of organic acids is that?
