Kuiz Sains Tambahan Tingkatan 5 Bab 8 Set 1

SELAMAT DATANG Kuiz Sains Tambahan Tingkatan 5 Bab 8 Set 1

Oseanografik (English)

KUIZ INI MENGANDUNGI 10 SOALAN

Which of the following factors would lead to a decrease in the salinity of ocean water?

High rates of evaporation

Melting of glaciers and icebergs

Low precipitation over the ocean

Formation of sea ice

None

Coral reefs require clear water to thrive. What is the primary reason for this requirement?

Clear water has a higher dissolved oxygen content necessary for coral respiration.

Sediment in murky water can physically smother and kill the coral polyps.

Sunlight needs to penetrate the water for the symbiotic algae (zooxanthellae) to perform photosynthesis.

Predatory fish are less able to hunt in clear water, protecting the reef’s inhabitants.

None

What distinguishes a 'seamount' from other features of the ocean floor?

It is a long, narrow depression that marks the deepest parts of the ocean.

It is a continuous underwater mountain range where new crust is formed.

It is an underwater mountain formed by volcanic activity.

It is a flat, deep area of the ocean floor covered in sediment.

None

A mid-ocean ridge is formed by which specific geological process?

Magma rising from the mantle as two plates move apart.

Thick layers of sediment accumulating over millions of years.

The collision of two oceanic plates, with one bending downward.

The horizontal sliding of two plates against each other.

None

The ocean acts as a 'carbon sink' through a biological process. What is the key first step in this process?

Plankton absorbing atmospheric carbon dioxide through photosynthesis.

Deep ocean currents physically pulling carbon dioxide down from the surface.

Decomposition of marine animals on the seafloor releasing stored carbon.

Carbon dioxide dissolving directly into seawater to form carbonic acid.

None

Which ocean floor mapping technique uses pulses of light, often from an aircraft, to measure the depth of shallower coastal waters?

Light Detection and Ranging (LiDAR)

Satellite Altimetry

Subduction Zone Imaging

Sound Navigation and Ranging (SONAR)

None

Overfishing is a significant issue threatening marine ecosystems. According to the text, why is the practice of bottom trawling particularly destructive?

It specifically targets only large, endangered predator fish.

It introduces invasive species into new marine environments.

It catches everything in its path and destroys the seabed habitat.

It causes chemical pollution from the large fishing vessels.

None

What is the primary mechanism behind the phenomenon of 'upwelling'

The Coriolis effect forcing deep ocean currents towards the surface.

Volcanic activity heating the seabed and causing water to circulate upwards.

Surface winds pushing warmer surface water away from a coastline.

Gravitational pull from the moon causing deep water to rise.

None

The daily rise and fall of sea levels, known as tides, are primarily caused by the gravitational pull of which celestial body?

Both the Sun and Moon equally.

The Moon, because of its close proximity to Earth.

The Sun, because of its immense mass.

The Earth’s own rotation on its axis.

None

10.

The temperature of the ocean varies significantly with depth. What is the term for the transitional layer where temperature changes rapidly?

Thermocline

Abyssal zone

Photosynthesis zone

Subduction zone

None

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