Classifications Of Substances

Question 1

I. Biological and non-biological substances both need oxygen for their existence.
II. The human body consists only of biological substances

Answer 1

I and II are both incorrect

Question 2

I. Every living organism needs some non-biological substances for its existence.
II. All non-biological substances are found as minerals in the earth

Answer 2

I is correct and II is incorrect

Question 3

Characteristics of life include:

Answer 3

Growth and metabolism

Question 4

Examples of synthetic substances are:

Answer 4

Plastics and silicones

Question 5

Examples of organic biological substances are:

Answer 5

Carbohydrates and fats

Question 6

Examples of mineral substances are:

Answer 6

Paraffins and Petroleum

Question 7

Matter is everything that:

Answer 7

Occupies space and has weight

Question 8

The three forms of matter are solids, liquids and:

Answer 8

Gases

Question 9

What property does all matter have?

Answer 9

All matter has weight

Question 10

Condensation is the change of matter from:

Answer 10

A gas to a liquid

Question 11

Vaporization is the change of matter from:

Answer 11

A liquid to a gas

Question 12

Melting is the change of matter from:

Answer 12

A solid to a liquid

Question 13

Sublimation is the change of matter from:

Answer 13

A solid to a gas

Question 14

Condensation is:

Answer 14

The change of a vapor to a liquid

Question 15

The alteration of the properties of matter without the formation of any new substance is called a/an

Answer 15

Physical change

Question 16

The immediate change of a solid into a vapor is called

Answer 16

Sublimation

Question 17

An example of a single-celled cellular organism is:

Answer 17

A bacterium

Question 18

I. A micro-organism is the smallest part of the human body.

II. All micro-organisms need nutrients for their existence

Answer 18

I is incorrect and II is correct

Question 19

Examples of bacteria are:

Answer 19

Bacilli and cocci