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WorksheetsREVISION SC PT3
Total questions: 65
Worksheet time: 33mins
Choose the correct order of the chambers through which deoxygenated blood flows in the human heart.
right atrium-----> right ventricle------> aorta
right atrium -----> right ventricle------> pulmonary artery
left atrium------> left ventricle------> aorta
left atrium-------> left ventricle-------> pulmonary artery
The sound ‘lub’ produced in the cardiac cycle occurs when both
semilunar valve close simultaneously
semilunar valve open simultaneously
atrioventricular valves close simultaneously
atrioventricular valves open simultaneously
Figure below shows one type of blood cell. What is the name of the blood cells and its function?
Red blood cell , Transport food
White blood cell , Transport food
Red blood cell, Transport oxygen
White blood cell, Transport oxygen
Which of the following is a type of blood vessel?
trachea
oesophagus
vein
intestine
High blood cholesterol, diabetes and hypertension can cause ....
coronary heart disease
constipation
anemia
leukemia
What type of blood vessel is shown in figure number 2?
vein
artery
capilary
aorta
Structure of the red blood cell is special, it lack of nucleus. this condition provide ... .
more space for hemoglobin
more space for cytoplasm
less space for hemoglobin
less space for cytoplasm
What is the function of valves in heart?
To prevent the backflow of blood in the chambers.
To allow the backflow of blood in the heart.
To initiate the flow of the blood in the heart.
The position of a metal in the reactivity series of metals depends on the reactivity of the metal when reacting with ....
Carbon
Hydrogen
Oxygen
Sulphur
Based on the following diagram, what is the function of potassium manganate (VII) crystals in this experiment?
To supply oxygen
To avoid the metals to mix with each other
To release heat
To give out water vapour
Complete the word equation below.
Magnesium + oxygen --> .....
Magnesium
Magnesium oxide
Oxides
Magnesium oxide + water
The diagram shows a setup apparatus for an experiment. What is the aim of the experiment?
To determine the position of carbon in the reactivity series of metals
To determine the position of hydrogen in the reactivity series of metals
To observe the reactivity of metals with carbon dioxide
To observe the reactivity of metals with water
When aluminium oxide react with carbon, there is no change that will occur. What is your inference for this observation?
Carbon cannot remove the oxygen from the aluminium oxide
Carbon is less reactive than aluminium
Aluminium is more reactive than carbon
All of the above
Based on the diagram, what is the function of anhydrous calcium chloride in the experiment?
To absorb water vapour so that dry hydrogen will be produced
To supply hydrogen gas
To separate the metals
To release heat for combustion
What will happened when lead oxide react with hydrogen?
Lead oxide burns brightly
Yellow powder turns shiny grey
Lead is produced
All of the above
Choose the correct sequence.
.............. , ............ , .........
----------------------------------->
Reactivity towards oxygen increases
Silver , Copper , Tin
Iron , Lead , Mercury
Magnesium , Aluminium , Calcium
Iron , Carbon , Lead
Figure above shows a Quartz. Quartz is a combination from several elements. What are those elements?
Silicon and carbon
Carbon, calcium and oxygen
Silicon and oxygen
Tin and oxygen
Name one example of metal other than iron that is extracted using the blast furnace.
Copper
Magnesium
Aluminium
Lead
Name the substance that is added into the blast furnace through the parts labelled P.
Aluminium ore
Carbon
Limestone
Iron(III) oxide
Thermochemistry is
the study of heat changes when physical reactions occur.
the study of heat changes when chemical reactions occur.
the study of energy changes when physical reactions occur.
Diagram shows reaction between sodium and water, producing heat. The reaction is known as (a) reaction
A device that is suitable to determine exothermic or endothermic reaction is (a)
Exothermic reaction is where heat is __________ to the surrounding
taken in
absord
released
Endothermic reaction is when the heat is _________________ from the surrounding
taken in
released
taken out
Cake baking is
endothermic
exothermic
Dissolving ammonium salt in water will cause a ___________ in surrounding temperature
increase
higher
drop
constant
Respiration, bomb explosion and neutralisation of acid with alkali are the examples of _______________ reactions
exothermic
endothermic
precipitation
When sodium hydroxide is added to hydrochloric acid, the temperature reading on the thermometer is ______________ and the reaction name is __________________
decreasing
increasing
constant
neutralisation
titration
Based on the experiment, sodium hydroxide and ammonium chloride are the
responding variable
fixed variable
manipulated variable
How are fossil fuels used to generate electrical energy?
Heat from burning fuel creates steam that spins a turbine.
Heat from burning fuel spins magnets inside an electric motor.
Heat from burning fuel causes an electric motor to produce a current.
Heat from burning fuel creates steam that turns a transformer.
A temporary magnet that only works when electricity is passed through wires surrounding an iron core is called:
electromagnet
galvanometer
induction
super conductor magnet
A device that protects a circuit by from having too much current is called a
switch
short
fuse or breaker
resistor
You can increase the strength of an electromagnet are increasing the current, adding iron to the core, and .....
increasing the number of coils on the magnet
Decreasing the number of coils on the magnet
Dividing the number of coil
A laptop is plugged into a 120 V outlet and uses 60 ohm's of resistance. How much current is running though it?
120 Amps
60 Amps
2 Amps
20 Amps
How are fossil fuels used to generate electrical energy?
Heat from burning fuel creates steam that spins a turbine.
Heat from burning fuel spins magnets inside an electric motor.
Heat from burning fuel causes an electric motor to produce a current.
Heat from burning fuel creates steam that turns a transformer.
fuel cells that use a chemical reaction to generate electricity are using
hydrogen gas
methane gas
water
oil
The flowchart shows the sequence of the components in the electricity transmission and distribution system.
Power station -----> _____________ -----> National Grid Network ----> Main substation ----> _____________ ----> _____________ ----> Branch substation ----> Step-down transformer
Switch zone, step-up transformer, step-down transformer
Switch zone, step-down transformer, step-up transformer
Step-up transformer, step-down transformer, switch zone
Step-up transformer, switch zone, step-down transformer
2-pin plugs are not connected to the earth wire.
TRUE
FALSE
Mei Ling got an electric shock while ironing her clothes. The following information shows the steps taken by his brother to help her.
P- Calls an ambulance
Q- Remove electrical source using an insulator
R- Switches off the main power supply
S- Perform mouth to mouth resuscitation if the victim is not breathing.
Which sequence is correct?
P, R, Q, S
P, Q, R, S
R, Q, S, P
R, Q, P, S
_______ carries electric current to an electrical appliances.
Neutral wire
Live wire
Earth wire
___________ cuts off the current supply in the house when excessive current flows through it.
ELCB circuit breaker
MCB circuit breaker
Main switch
Electric meter
___________ disconnects the current supply temporarily when it is not needed (such as during repairing damaged wiring).
ELCB circuit breaker
MCB circuit breaker
Main switch
Electric meter
If an electrical appliance uses current of 11 A, which is the suitable value of fuse to be used.
15 A
5 A
10 A
13 A
A student needs 10 Newtons of force to lift a box to the top of a 2 meter shelf. How much work do they do?
12 J
8 J
20 J
5 J
Which of these items is not part of the law of conservation of energy?
energy cannot be created
energy cannot be destroyed
energy can be transferred between forms
energy is destroyed by friction
___________________________is the energy stored in a body or
system because of its position, shape and state.
kinetic energy
mechanical energy
potential energy
energy due to spring
A crane lifts an 8-m long steel girder weighing 2600 N up 15 m off the ground. The crane did ___ of work.
0 J
39000 J
20800 J
2600 J
If there is no friction on this track, at which point would the coaster have the most kinetic energy?
A
B
C
D
A 40-kg person is climbing 3 m up a flight of stairs in 6 seconds. How much work did they do climbing the stairs?
400 J
1200 J
200 J
120 J
If a 1300-kg car has been lifted so it has 19500 J of potential energy, it was lifted up ---.
1.5 m
150 m
15 m
0.67 m
How does conservation of energy explain why something that is falling should speed up?
It gains kinetic energy because it gains potential energy.
It loses kinetic energy because no work was done on it.
It gains kinetic energy because it loses potential energy.
It loses kinetic energy because the Earth gains potential energy.
A weight-lifter raises a 2000N weight through a vertical height of 2.0m in 0.80s. What useful power does he develop in doing this?
800 W
700W
4000W
5000W
