Chapter 2 – Forces and
Motion
1.
Diagram 1 shows two wooden
tops. One of the tops is partly coated with tin. Both tops are of the same size
and are rotated with the same velocity.
Diagram 2 shows the top
which is partly coated with tin able to spin longer.
 |
 |
|
Diagram 1
|
Diagram 2
|
Based on the above
information and observation:
a)
State one suitable inference
b)
State one suitable hypothesis
c)
With the use of apparatus such
as a hacksaw blade, plasticine and other apparatus, describe one experiment to
investigate the hypothesis as stated in (b)
In your description, state clearly the following:
i.
The aim of experiment
ii.
Variables in the experiment
iii.
List of apparatus and materials
iv.
Arrangements of apparatus
v.
Procedure of the experiment
which should include the method of controlling the manipulated variable and the
method of measuring the responding variable
vi.
The way you would like to
tabulate the data
vii.
The way you would analyse the
data
2.
Diagram 1 shows a man pushing a
broken-down car with passengers in it. The car moves with a small acceleration.
Diagram 2 shows the man pushing the same car with the same force with no
passengers in it. The car moves with a bigger acceleration.
 |
 |
|
Diagram 1
|
Diagram 2
|
Given apparatus: trolley,
slotted weight, ticker timer.
3.
Diagram 1 shows a worker
carrying a gas tank. Diagram 2 shows the same worker carrying two gas tanks.
Observe the length of the spring in the suspension system of the motorcycle in
both situations.
 |
 |
|
Diagram 1
|
Diagram 2
|
Given apparatus: spring, slotted
weights.
Chapter 3 – Forces and
Pressure
1.
Diagram 1 and diagram 2 show a
worker pushing a wheelbarrow on a soft ground. He noticed that the tyre sinks
deeper into the ground when the wheelbarrow is loaded.
 |
 |
|
Diagram 1
|
Diagram 2
|
Given apparatus: pasticine,
weights
2.
Diagram 1 shows a diver in the
sea. Diagram 2 shows the same diver at deeper position. He noticed that both of
his ears feel unconfortable due to the pressure of sea water.
 |
 |
|
Diagram 1
|
Diagram 2
|
Givem apparatus: thistle
funnel, U-tube, container, rubber band, rubber sheet
3.
Diagram 1 shows a student
squeezing a balloon filled with air. Diagram 2 shows the student squeezing the
balloon further upwards the volume of the baloon decreases and it becomes
harder.
 |
 |
|
Diagram 1
|
Diagram 2
|
Given apparatus: syringe, rubber
tube
Chapter 5 – Light
1.
Diagram 1 shows two opaque
cups, A and B containing different amount of water. A similar coin is placed at
the botton of the cup. Observe the depth of water and the position of the
images of the coins
Diagram 1
Apparatus give: tall
beaker, pins
2.
Diagram 1 and 2 shows a camera
with convex lens in different positions.
The photograph in Diagram
2(a) shows the image of the two cars formed with the convex lens of the camera
is in the position as shown Diagram 1(a).
The photograph in Diagram
2(b) shows the image of the two cars formed with the convex lens of the camera
is nearer to the as shown Diagram 1(b).
 |
 |
|
Diagram 1(a)
|
Diagram 1(b)
|
 |
 |
|
Diagram 2(a)
|
Diagram 2(b)
|
Given apparatus: convex lens, ray
box
------------------------------------------------------------------------------------------------------------
------------------------------------------------------------------------------------------------------------
Chapter 6 – Waves
1. Diagram below shows a
cross-section of seabed and the water waves as it propagates to the seashore.
Given apparatus: Ripple tank and glass block.
2. Diagram 1 and 2 shows two taps
releasing droplets of water into large containers
The number of droplets which fall per second in Diagram 1 is more
compared to the number of droplets in Diagram 2.
The cross-section of the water waves formed from the droplets in the
container are shown in the diagrams.
|
|
|
|
Diagram
1
|
Diagram
2
|
Given apparatus: Ripple tank, vibrator motor with adjustable frequency.
3. Diagram 1 shows a boy tapping the
surface of water with both his feet simultaneously.
Diagram 2 shows the boy repeating his action with his feet further
apart.
|
|
|
|
Diagram 1
|
Diagram 2
|
Given apparatus: Ripple tank, two dippers
Chapter 7 – Electricity
1. Diagram 1 shows Jason taking a
shower on a very cold morning. After the water heater is switched on for a
while, he still feels cold.
Diagram 2 shows that Jason no longer feels cold after the temperature
control knob on the heater is turned.
|
|
|
|
Diagram
1
|
Diagram
2
|
Use your knowledge of the effect of current on heating
Given apparatus: Beaker, ammeter, immersion heater
2. Diagram 1 and Diagram 2 show two
electric bread toasters A and B with the same power rating.
Toaster A has thick heating element. It glows less brightly and
produces less heat.
Toaster B has a thin heating element. It glows more brightly and
produces more heat.
 |
 |
|
Diagram
1
|
Diagram
2
|
Design an experiment using your knowledge about electrical resistance.
Given apparatus: d.c. power supply, ammeter, voltmeter, constantan
wire.
Chapter 8 – Electromagnetism
1. Diagram 1 shows an electromagnet
being used to lift scrap metal.
Diagram 2 shows the same electromagnet being used to lift bigger
quantity of scrap metal when current flowing through it is increased.
|
|
|
|
Diagram
1
|
Diagram
2
|
Given apparatus: soft iron core, insulated copper wire, pins
2. Diagram below shows two similar
electric bells, A and B. The current which flows through both bells is the
same. Bell A has more turns of wire. Its hammer strikes the gong harder to
produce louder ring. Bell B has less turns of wire. Its hammer strikes the gong
weaker to produce a softer ring.
Given apparatus: soft iron core, insulated copper wire, pins
3. Diagram 1 and Diagram 2 show a
mixer.
In Diagram 1, the dial is set at mnimum current and the beaters are
spinning.
In Diagram 2, the dial is set at maximum current and the beaters spin
faster.
|
|
|
|
Diagram
1
|
Diagram
2
|
Given apparatus: d.c. power supply, magnets, C-shape iron yoke, bare
copper wire, connecting wires, pins
No comments:
Post a Comment