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1.
Figure 1 shows an apparatus that is frequently used in the science laboratory.
( a ) Name the apparatus.
______________________________________________________________________
( 1 mark )
( b ) What is the use of the apparatus?
______________________________________________________________________
( 1 mark )
( c ) State the unit used in this apparatus.
_____________________________________________________________________
( 1 mark )
( d ) Label the zero mark on the apparatus in the above figure.
( 1 mark )
( e ) How should you position your eye when reading the measurement at P?
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___________________________________________________Learning To Score 2005
( f ) You are advised to hold a piece of white paper behind the above apparatus when
reading it. Why?
______________________________________________________________________
( 1 mark )
2.
Figure 2 shows the apparatus used in an experiment.
(a) What is the aim of the above experiment?
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( 1 mark )
(b) State the way of heat transfer in this experiment
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( 1 mark )
(c) Which water mark will rise higher?
______________________________________________________________________
( 1 mark )
(d) Give two (2) characteristics of a dull surface.
(i). ____________________________________________________________
(ii). ____________________________________________________________
( 2 marks )
( e ) How should you position your eye when reading the measurement at P?
____________________________________________________________________
( 1 mark )
(f) If a white car and a black car are parked under the sun for one hour, which car
will cool faster ?
______________________________________________________________________
3.
3. ( a ) Label the following parts in figure 3
� Ear canal
� Ear drum
� Ear ossicles
( 3 marks )
( b ) State the functions of the parts of the ear.
( c ) Name one part of the ear which contain fluid.
_______________________________________________________
( 1 mark )
4.( a ) Name the S. I unit for measuring the following
( b ) A boy weighing 50 kg carried a load of 40 N up a staircase which is 6 m high
( 1 kg exerts a force of 10 N). Calculate the energy used by the boy.
___________________________________________________________________
___________________________________________________________________
( 2 marks )
( c ) If the boy took 10 seconds to carry the load up the staircase, what power did he
generate?
____________________________________________________________________
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( 2 marks )
( d ) Arrange the following surfaces according to their texture from roughest to
smoothest
Sand paper
Ice
Wood
________________ → ____________________ → _____________________
5.
Table 1 shows the donor and recipient of a blood transfusion.
(a) Give the meaning of
(i) Universal donor : __________________________________________________
(ii) Universal recipient : _______________________________________________
(2 marks)
(b) Based on Table 1, state the blood group of
(i) G1: _________________________________________
(ii) G2: _________________________________________
(iii) G3: _________________________________________
(3 marks)
(c) What happens when incompatible blood groups are mixed?
___________________________________________________________________
(1 mark)
(d) When is blood transfusion necessary?
__________________________________________________________________
(1 mark)
6.
(a) Name the cells:
Cell A : _________________________________
Cell B : _________________________________
(2 marks)
(b) Where are cell A and cell B produced?
Cell A : _________________________________
Cell B : _________________________________
(2 marks)
(c) What is the role of cell A in reproduction?
___________________________________________________________________
(1 mark)
( d ) Give two differences between cell A and cell B in the table below:
7. A student sets up an experiment to investigate the factors that affect the rate of water
evaporation. The apparatus and the materials are set up as shown in the figure
below.
(a) What is the hypothesis that you can make from the experiment ?
____________________________________________________________________
(1 mark)
(b) State the variable that
(i) is kept constant : _________________________________________________
(ii) is manipulated : __________________________________________________
(iii) responds : ______________________________________________________
(3 marks)
c)
( i) What is your observation after one hour?
____________________________________________________________________
( 1 mark )
(ii) Give an inference for your answer.
____________________________________________________________________
(1 mark)
d) Suggest another method to dry the damp filter paper more quickly?
____________________________________________________________________
(1 mark)
e) Based on the Kinetic Theory, what happens to water molecules when the
temperature is raised ?
_____________________________________________________________________
(1 mark)
f) State one similarity and one difference between evaporation and boiling
Similarity :____________________________________________________________
Difference : __________________________________________________________
(2 marks)
g) Give one example to show the principle of water evaporation in everyday life
_____________________________________________________________________
(1 mark)
8. The figure shows the apparatus set-up to study the reading of the current using an
ammeter in the electric circuit. Table shows the results of the experiment.
(a) ( i) Calculate the total current of I2 and I3.
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( 1 mark )
(ii) Write the formula to show the relationship between I1 , I2 and I3 .
_________________________________________________________________
( 1 mark )
(b) What is your observation regarding the brightness of bulbs P and R ?
___________________________________________________________________
( 1 mark )
(c) ( i) Predict what will happen if bulb P and bulb Q are burnt out
______________________________________________________________________
( 1 mark )
(ii) Explain your answer.
______________________________________________________________________
( 1 mark )
(d) (i) What is the voltage of bulb P if the voltage of bulb Q is 2V and the voltage of bulb
R is 2V.
______________________________________________________________________
( 1 mark )
(ii) Calculate the resistance if current 1A and voltage 3V is supplied to
the circuit.
____________________________________________________________________
____________________________________________________________________
(2 marks)
(e) Write down Ohm’s Law.
____________________________________________________________________
(1 mark)
Answer:
1.
( a ) measuring cylinder
( b ) to measure the volume of liquids
( c ) milliliter
( d ) ( label ‘0’ at the bottom of the measuring cylinder )
( e ) the eye is placed at the meniscus level // the curved surface of the liquid
( f ) to get an accurate reading
2. ( a ) to compare which surface condition will absorb heat better
( b ) Radiation
( c ) Apparatus L
( d ) (i) Good absorbers of heat
(ii) Good radiators of heat
( e ) the dull surface absorbs heat faster than the shinysurface
( f ) black car
3.
( c ) Cochlea or semi-circular canals
4.
( b )Energy used = newtons X metres
= ( 500 + 40 ) X 6 m
= 3240 J.
( c ) Power = joules
------------seconds
= 3240 W
-------10
= 324 W.
( d ) Sand paper → Ice → Wood
5. (a) (i) People with blood group O can donate blood to recipients of all blood groups
(ii) people with blood group AB can receive blood from donors of all blood groups
(b) (i) G1 : B // AB
(ii) G2 : A // O
(iii) G3 : AB // A // O
( c ) Blood clotting // agglutination // dangerous for the recipient // threaten the life
(d) in the event of an accident // some illnesses which Involves blood loss
6.
( a ) A – Sperm spermatozoon B - Ovum // egg cell
( b ) A - produced in testes B - produced in ovary
( c ) to fertilise the ovum to form a zygote // to fuse with Ovum during fertilization
( d ) Size : Cell A – smallest cell / very small / smaller than B
Cell B – biggest cell / bigger than A / largest cell /Big.
Mobility : Cell A : move on its own / swims with the helpof its tail.
Cell B : does not move on its own.
7.
( a ) When the temperature increase, the rate of evaporation is faster.
( b ) (i) Damp filter paper / thread (ii) Temperature / amount of light (iii) Rate of evaporation
( c ) (i) Filter paper A dry up, but filter paper B still damp
(ii) The evaporation of water is faster when the temperature high (under the sun)
( d ) Increase the airflow / decrease the humidity
( e ) More faster and further apart
(f)
Similarity :
Liquid change to gas / both need heatEnergy
Difference :
Evaporation - below 100 o c
- occurs only on the surface
Boiling
- at 100 0 c
- through out the container / whole part
( g ) Drying clothes / drying fish / any suitable answers
8.
a. i. 1A + 1A = 2A
ii. I1 = I2 + I3
b. Bulb P brighter than bulb R
c. i. All the bulbs will not light up
ii. Because there is no current flow // current cannot flow
d. i. V = 2V
ii. V=IR - 1m
R = V = 3 = 3 ohm - 1 mark
e. The current flowing through a conductor is directly proportional to the voltage / R = V