Cycle
Which stage comes directly after the larva in a butterfly’s life cycle?
A) Egg
B) Pupa
C) Adult
D) Caterpillar
Answer: B) Pupa
What system in plants transports water from roots to leaves?
A) Circulatory system
B) Xylem vessels
C) Phloem vessels
D) Respiratory system
Answer: B) Xylem vessels
Which of these shows a correct energy conversion in a loudspeaker?
A) Sound → Electrical
B) Electrical → Sound
C) Heat → Sound
D) Chemical → Sound
Answer: B) Electrical → Sound
Which of the following materials is waterproof?
A) Cotton
B) Rubber
C) Paper
D) Sponge
Answer: B) Rubber
Which of the following objects converts electrical energy into light energy?
A) Radio
B) Fan
C) Torch
D) Microwave oven
Answer: C) Torch
What happens during photosynthesis?
A) Plants take in oxygen and give out carbon dioxide.
B) Plants take in carbon dioxide and give out oxygen.
C) Plants take in nitrogen and give out oxygen.
D) Plants take in water and give out food.
Answer: B) Plants take in carbon dioxide and give out oxygen.
Which human body system transports nutrients and oxygen to body cells?
A) Digestive system
B) Respiratory system
C) Circulatory system
D) Skeletal system
Answer: C) Circulatory system
Which of the following shows a predator-prey relationship?
A) Bee and flower
B) Lion and zebra
C) Dog and flea
D) Cow and grass
Answer: B) Lion and zebra
Which of the following materials is best for making a cooking pot?
A) Wood
B) Plastic
C) Glass
D) Stainless steel
Answer: D) Stainless steel
Why does a black car feel hotter than a white car on a sunny day?
A) Black surfaces reflect more heat
B) Black surfaces absorb more heat
C) White surfaces absorb more heat
D) Black surfaces produce more heat
Answer: B) Black surfaces absorb more heat
Which component of a cell controls the activities of the cell?
A) Cytoplasm
B) Nucleus
C) Cell membrane
D) Mitochondria
Answer: B) Nucleus
Which organ is NOT part of the human digestive system?
A) Stomach
B) Liver
C) Heart
D) Small intestine
Answer: C) Heart
How is sound energy transferred?
A) Through chemical reactions
B) By electromagnetic waves
C) Through vibrations in a medium
D) By electric currents
Answer: C) Through vibrations in a medium
Which of the following is a homogeneous mixture?
A) Salad
B) Oil and water
C) Saltwater
D) Sand and iron filings
Answer: C) Saltwater
Which method of heat transfer requires a medium?
A) Conduction
B) Convection
C) Radiation
D) Both A and B
Answer: D) Both A and B
Which of the following best describes the particulate model of matter?
A) Matter is continuous and uniform throughout.
B) Matter is made up of tiny, discrete particles.
C) Matter consists only of living cells.
D) Matter cannot be divided into smaller parts.
Answer: B) Matter is made up of tiny, discrete particles.
Which blood vessel carries oxygenated blood away from the heart?
A) Vein
B) Capillary
C) Artery
D) Lymph vessel
Answer: C) Artery
Which statement best describes work done by a force?
A) Work is done when an object is moved by a force.
B) Work is done when a force is applied but there is no movement.
C) Work is done when energy is stored in an object.
D) Work is done when an object changes direction.
Answer: A) Work is done when an object is moved by a force.
Which laboratory technique separates a soluble solid from a solution?
A) Filtration
B) Crystallisation
C) Magnetic separation
D) Chromatography
Answer: B) Crystallisation
The energy efficiency of a light bulb is 20%. What happens to the remaining 80% of energy supplied?
A) Converted into more light energy
B) Lost as sound energy
C) Converted into heat energy
D) Stored for later use
Answer: C) Converted into heat energy
Which of the following best describes diffusion?
A) Movement of particles from an area of low concentration to high concentration
B) Movement of particles from an area of high concentration to low concentration
C) Movement of particles against a concentration gradient
D) Movement of water molecules through a selectively permeable membrane
Answer: B) Movement of particles from an area of high concentration to low concentration
In the human digestive system, what is the function of bile?
A) Breaks down carbohydrates
B) Emulsifies fats
C) Neutralises stomach acid
D) Breaks down proteins
Answer: B) Emulsifies fats
What happens to the pressure of a gas if its volume decreases and temperature stays constant?
A) Pressure increases
B) Pressure decreases
C) Pressure stays the same
D) Volume has no effect on pressure
Answer: A) Pressure increases
Which physical property makes aluminium useful for making airplane bodies?
A) It is heavy
B) It is brittle
C) It is lightweight and strong
D) It is a poor conductor of heat
Answer: C) It is lightweight and strong
Which of the following represents an exothermic reaction?
A) Melting of ice
B) Boiling water
C) Combustion of fuel
D) Photosynthesis
Answer: C) Combustion of fuel