SCIENCE quiz for grade SSS 2

1.    When a solid substance disappears completely as a gas upon heating, the substance is said to have undergone ______.

• Crystallization

• Sublimation

• Decantation

• Evaporation

1.    Hydrogen is used for the following except _____.

 

• Manufacturing of margarine

• Conversion of coal to petrol

• Extinguishing fire

• Manufacturing of ammonia

1.    The major constituent of air is ______.   

• Hydrogen

• Water vapour

• Carbon(iv)oxide

• Nitrogen

1.    An increase in the pressure of a gas results in the decrease of its _____.   

• Concentration

• Temperature

• Volume

• Mass

1.    Which of the following elements is diatomic?   

• Argon

• Carbon

• Oxygen

• Sodium

Rhizobium which lives in the root modules of leguminous plants is an example of the association known as a.   

• Commensalism

• Epiphytism

• Mutualism

• Saprophytism

Which part of the nephron is associated with ultrafiltration? 

• Distal convoluted tubule

• Proximal convoluted tubule

• Collecting duct

• Bowman's capsule

Muscles are attached to bones by means of  -----------.

  

• Tendons

• Ligaments

• Cartilage

• Nerves

The producers in a food chain in an aquatic environment are 

 

• Birds

• Phytoplankton

• Zooplankton

• Fishes

The excretory product in protozoans is ----------.

• Amino acids

• Uric acid

• Ammonia

• Urea