Science Form 4 KSSM (Revision c9-12)

Science Form 4 KSSM (revision)

Poll

DO YOU SUPPORT NUCLEAR ENERGY AS ALTERNATIVE ENERGY TO BE USE IN MALAYSIA?

• YES

• NO

• NOT SURE

Multiple Choice

One disadvantage of nuclear energy is ___.

• it is a fossil fuel

• it leaves behind radioactive waste

• it emits large amounts of pollution into the atmosphere

• there are no disadvantages

Multiple Choice

This is an example of ---

• Radioactive Decay
• Nuclear Fission
• Nuclear Fusion
• Fossil fuel reaction

Multiple Choice

This is an example of...

• Fission  reaction
• Fusion reaction
• Decomposition reaction
• Decay

Multiple Choice

Which of the following is NOT a nuclear accident that occurred at a nuclear power plant?

• Chernobyl

• Fukushima

• Hiroshima

Multiple Choice

Which of the following is true about fusion?

• Fusion happens in atomic bombs

• Fusion happens at nuclear power plants

• Fusion happens on the sun and stars

Multiple Choice

What is coming out of the tops of the cooling towers of a nuclear power plant?

• Carbon dioxide

• water vapor

• Nitrogen oxide

• Pollution

Multiple Choice

The combining of 2 nuclei to form a larger nucleus is called___.

• Fission

• Fusion

• Radioactive waste

• Compounds

Multiple Choice

The splitting of a nucleus of an atom is called____

• Fission

• Fusion

• Radioactive waste

• Craziness

Multiple Choice

Nuclear power plants produce electricity using energy from the radioactive decay of

• Uranium 235

• Uranium 238

• Plutonium 235

• Plutonium 238

Multiple Choice

Which of the following is NOT a nonrenewable energy resource?

• Oil

• Coal

• Wind

• Nuclear fuels

Nuclear energy

Nuclear fission, Nuclear fusion, Nuclear reactor, Electricity generation, Nuclear catastrophe

Multiple Choice

Seat belt is needed for safety purpose in a vehicle. What is the use of the seat belt?

• To increase the effect of inertia

• To reduce the effect of inertia

• To increase the effect of momentum

• To decrease the effect of momentum

Multiple Choice

Diagram shows the two tins of the same size oscillating after they are released from the same height. After a while the tin filled with sand is still oscillating while the empty tin has stopped. What is the inference can be made for this experiment?

• The tin filled with sand has the biggest inertia

• The tin filled with sand has the smallest inertia

Multiple Choice

Which phenomenon shows the effect of Inertia?

Multiple Choice

Diagram 3 shows a cat chasing a rat. The inertia of the cat is bigger than the rat because.

• The size of the cat is bigger than the rat

• The length of the cat is more than the rat

• The mass of the cat is bigger than the rat

Multiple Choice

Because of inertia, a moving object will keep ________.

• at rest
• moving
• in one spot
• inertia 

Multiple Choice

Because of inertia, a resting object will remain at ________.

• rest
• a constant speed
• school
• inertia 

Multiple Choice

Objects with greater _________ also have greater inertia.

• speed

• mass

• temperature

• friction

Multiple Choice

Inertia is not a force.

Inertia is the tendency of an object to resist a change in its ___________.

• temperature

• shape

• size

• motion

Free fall is any motion of a body where gravity is the only force acting upon it. 

Multiple Select

Is this a free fall?

• YES

• NO

Multiple Choice

The heavier objects fall to the ground more quickly than lighter objects in a vacuum chamber.

• True

• False

Multiple Choice

What does this graph represent?

• Constant speed
• Acceleration
• Not moving

Multiple Choice

What is happening in this graph from point B to C?

• The object is going down a hill.

• The object is returning to its starting location.

• The object is slowing down.

• The object is staying still.

Fill in the Blank

What is the acceleration of Usain Bolt if he starts

from rest and attains a velocity of 10.44 m s^–1 at

the 100 m finish line in 9.58 seconds?

Acceleration= Change of velocity/Time taken

Answer: ........ms^-2

Multiple Choice

At 60 seconds, how far had this object traveled? 

• 0 m
• 10 m
• 20 m
• 40 m

Fill in the Blank

A student paticipates in a 100 m race. He recorded 12.58 seconds in the event. What is his average speed?

Answer:........... ms^-1

Average speed = Total distance/total time

Multiple Choice

A car starts from rest at a stop light and reaches 20 m/s in 3.5 seconds. Determine the acceleration of the car.

Acceleration = Change of velocity / Time taken

• 2.2m/s²

• 7.0m/s²

• 5.7m/s²

• 70m/s²

Multiple Choice

Scott drives a Jeep 12 km east, then 4 km north, then finally 3 km west. He traveled a total distance of:

• 5 km

• 10 km

• 13 km

• 19 km

Ticker timer, ticker tape, trolley, track, power pack

Force and motion

Multiple Choice

Free radicals are atoms or molecules that ...... one electron which makes the atoms or molecules to be unstable, reactive and tend to attack other atoms or molecules.

• extra

• lack

Multiple Choice

• A

• B

• C

• D

Multiple Choice

• A

• B

• C

• D

Multiple Choice

• A

• B

• C

• D

Multiple Choice

• A

• B

• C

• D

Multiple Choice

• A

• B

• C

• D

Multiple Choice

• A

• B

• C

• D

Chemicals in Medicine and Health

Traditional, Modern, Medicines, Free radicals, Antioxidant

Multiple Choice

Which of the following are the characteristics of vulcanised rubber?

I Resistant to heat.

II Good electrical insulator.

III Oxidised easily in the air.

IV Reacts with acid and alkali.

• I and II

• I and IV

• II and III

• III and IV

Multiple Choice

What is the function of sulphur in the production of vulcanised rubber?

• Cause latex to coagulate

• maintain latex in liquid state

• Breakdown polymer molecules

• Produce crosslinks between the polymer chains of rubber

Fill in the Blank

During vulcanisation, ______atoms are added to the chain of natural rubber polymer molecules

Multiple Choice

What should be added to latex to prevent coagulation of latex?

• Ethanoic acid

• Ammonia

• Distilled water

• Sulphur

Multiple Choice

What is the use of polythene?

• Make car windows

• Make gloves

• Make packaging containers of electrical appliances

• Make plastics bottles

Multiple Choice

Which of the following pairs of polymer and monomer is incorrect?

• polymer : polythene. monomer: ethene

• polymer : synthetic rubber monomer: isoprene

• polymer : perspex. monomer: methyl methacrylate

• polymer : polysytrene. monomer: styrene

Multiple Choice

What is polymer?

.......... chained molecules which consists of combination of ........ molecular unit

• Large, smaller

• Small, larger

Multiple Select

Which of the following is made of ceramic?

Multiple Choice

Choose the correct statement about the characteristic of ceramic.

• Can withstand high temperature and pressure.

• Good electrical conductor.

• Non-brittle.

• Can react with chemical substances.

Multiple Choice

Which of the following is made from borosilicate

glass?

Multiple Choice

What is superconductor alloy?

• A substance that does not have resistance at a

  low temperature.

• A substance which is a good conductor of heat.

• A substance that can conduct electricity at high

  efficiency without resistance.

• A substance which is a good electrical insulator.

Multiple Choice

Which of the following is wrong about duralumin?

• Light

• Resistant to corrosion

• Main component is tin

• Strong

Multiple Choice

Which diagram represents alloy?

Chemicals in industry

Alloy, Glass, Ceramic, Polymer, Natural rubber, Vulcanised rubber