🌱 Life Science (Set 2)
1. Cells & Structures
Which organelle provides energy for the cell by breaking down food?
A. Nucleus
B. Mitochondria
C. Vacuole
D. Ribosome
2. Organ Systems
Which system carries oxygen and nutrients through the body?
A. Digestive
B. Nervous
C. Circulatory
D. Skeletal
3. Ecosystems
What role do plants play in an ecosystem?
A. Consumers
B. Producers
C. Decomposers
D. Predators
4. Genetics
If brown eyes (B) are dominant over blue (b), what are the possible eye colors of offspring from Bb × Bb?
A. All brown
B. All blue
C. 75% brown, 25% blue
D. 50% brown, 50% blue
5. Evolution
Fossils of ancient whales show they once had legs. This supports the idea of:
A. Natural selection
B. Common ancestry
C. Artificial selection
D. Mutation
⚡ Physical Science (Set 2)
6. Matter & Atoms
Which part of an atom has a negative charge?
A. Proton
B. Neutron
C. Electron
D. Nucleus
7. Chemical Changes
Which is a chemical change?
A. Ice melting
B. Paper burning
C. Sugar dissolving
D. Cutting wood
8. Energy
What type of energy does a stretched rubber band have?
A. Kinetic
B. Chemical
C. Potential
D. Thermal
9. Motion & Forces
If an object’s speed increases, what is happening?
A. Acceleration
B. Inertia
C. Gravity
D. Friction
10. Electricity
In a series circuit, if one bulb burns out:
A. The other bulbs stay on
B. The other bulbs go out
C. The current increases
D. Nothing changes
🌍 Earth & Space Science (Set 2)
11. Earth’s Systems
Volcanoes, mountains, and earthquakes belong to which sphere?
A. Atmosphere
B. Geosphere
C. Hydrosphere
D. Biosphere
12. Earth & Human Activity
Deforestation leads to higher levels of which gas in the air?
A. Oxygen
B. Carbon dioxide
C. Nitrogen
D. Hydrogen
13. Weather & Climate
What causes winds on Earth?
A. Earth’s rotation only
B. Uneven heating of Earth’s surface
C. Earth’s orbit
D. Gravity from the Moon
14. Universe
Why does the Moon appear to shine at night?
A. It produces its own light
B. It reflects sunlight
C. It glows from heat
D. It has glowing gases
15. Earth in Space
Which movement causes day and night?
A. Earth’s revolution around the Sun
B. Earth’s rotation on its axis
C. The Moon orbiting Earth
D. Earth’s tilt
🌱 Life Science (Set 2)
ReplyDelete1. B – Mitochondria
Mitochondria are the “powerhouses” of the cell — they release energy by breaking down glucose.
2. C – Circulatory system
It transports oxygen, nutrients, and waste through the blood.
3. B – Producers
Plants make their own food through photosynthesis, forming the base of food chains.
4. C – 75% brown, 25% blue
Bb × Bb → BB, Bb, Bb, bb → 3 brown : 1 blue.
5. B – Common ancestry
Fossil evidence shows whales evolved from ancestors that once walked on land.
⚡ Physical Science (Set 2)
6. C – Electron
Electrons are negatively charged and orbit the nucleus.
7. B – Paper burning
Burning creates new substances (ash, CO₂) = chemical change.
8. C – Potential
A stretched rubber band stores energy = elastic potential energy.
9. A – Acceleration
Acceleration is a change in speed or direction of motion.
10. B – The other bulbs go out
In a series circuit, current has only one path. If one bulb fails, the whole circuit is broken.
🌍 Earth & Space Science (Set 2)
11. B – Geosphere
Mountains, volcanoes, and earthquakes belong to Earth’s solid part = geosphere.
12. B – Carbon dioxide
Cutting trees reduces CO₂ absorption → more CO₂ in atmosphere.
13. B – Uneven heating of Earth’s surface
Warm air rises, cool air sinks → causes convection currents = wind.
14. B – It reflects sunlight
The Moon does not produce its own light, it reflects the Sun’s light.
15. B – Earth’s rotation on its axis
Earth spinning once every ~24 hours causes day and night.