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WorksheetsFORM 2 SCIENCE CHAP 5: WATER AND SOLUTION
Total questions: 25
Worksheet time: 12mins
More than _______________ of Earth's surface is covered with water.
60%
70%
65%
80%
Water has a high surface tension. Surface tension is a result of ______________________________ between the molecules of water at the surface that allows insects like daddy longlegs to stay afloat on the water.
attractive force
repulsive force
cohesive force
capillary force
Adhesive force between water molecules and cell walls of ______________________ allow water to be drawn up from the roots to the leaves of plants. this phenomenon is known as capillary action.
xylem
floem
tube
vessel
Water is a ____________________________ .
mixture
atom
compound
solid
Water molecule is made of ___________ of hydrogen and __________________ atom of oxygen.
one , two
three , two
two , one
two , two
Sublimation is a process of changes in the state of matter from ___________________________________________
gas to solid
solid to liquid
liquid to gas
gas to liquid
These two processes absorbs heat energy during the changes in the state of matter.
freezing and evaporation
evaporation and condensation
boiling and melting
freezing and condensation
During electrolysis the ___________________ gas is produced at the anode
oxygen
hydrogen
During the electrolysis the ________________ gas is produced at cathode.
oxygen
hydrogen
The impurities such salt when added to water will _______________ the freezing point of water.
increase
remain the same
decrease
The impurities such as sugar or salt will _____________________________________ the boiling point of the water.
increase
remain the same
decrease
Evaporation only occurs on the ___________________ of water
bottom
surface
boiling point
One of the characteristic below does not affect the rate of evaporation :
humidity
colour of the water
total surface area of the water
surrounding temperature
movement of air speed
Name two applications of evaporation of water:
dried seafood
obtaining sea salt
soaking fruits in salt
hydroelectric generation
_________________________ is a substance that can dissolve in a liquid
solute
solvent
solution
________________________ is a liquid that dissolves a substance
solute
solvent
solution
______________________ is the mixture formed when a solute
dissolves in a solvent.
solute
solvent
solution
A ____________________________________ IS A CLOUDY MIXTURE FORMED FROM UNDISSOLVED SOLUTE PARTICLES IN A SOLVENT
solute
colloid
suspension
solubilty
________________________ IS A MIXTURE OF TWO OR MORE SOLUTES DISPERSED EVENLY IN A SOLVENT AND IT IS AN INTERMEDIATE BETWEEN A SOLUTION AND A SUSPENSION
solute
colloid
suspension
solubity
___________________________ method is not a water purification method.
mixing salt
boling water
chlorination
filtration
Based on the diagram above these are the reasons why the water pollution occur except for _________________________
using water filter at home
using chemicals in agriculture
using chemicals in industries and industrial waste
domestic waste released to the river
Answer true or false,
River water and sewage are natural water resources
true
false
Answer true or false,
Alum and slaked lime are added in the coagulation tank
true
false
Answer true or false,
Chlorination can remove impurities in the water
true
false
Arrange the stages involved in the water purification system
coagulation, sedimentation, oxidation, flouridation
filtration,sedimentation, coagulation, chlorination
filtration, coagulation, sedimentation, chlorination
sedimentation, coagulation, filtration, chlorination
