Water Ocean Class 11 CBSE

What are the physical properties of ocean water?

• Taste, radioactivity, electrical conductivity

• Transparency, pressure, sound

• pH level, turbidity, smell

• Salinity, temperature, density, and color

Explain the chemical composition of ocean water.

• Hydrogen peroxide, carbon dioxide, and nitrogen gas

• Aluminum sulfate, copper chloride, and zinc oxide

• Calcium carbonate, potassium nitrate, and iron oxide

• Sodium chloride, magnesium chloride, and sulfate ions

How do ocean currents affect the climate?

• By creating more rainfall in desert areas

• By increasing the amount of oxygen in the atmosphere

• By causing earthquakes and tsunamis

• By redistributing heat around the Earth

What is the impact of human activities on the ocean environment?

• Negative impacts such as pollution, overfishing, and climate change

• Negative impacts such as reduced pollution, sustainable fishing, and stable climate

• Positive impacts such as increased biodiversity and improved water quality

• No impact at all, human activities have no effect on the ocean environment

What are the major factors that influence the physical properties of ocean water?

• Temperature, salinity, and pressure

• Wind speed, marine life, and pollution

• Color, depth, and tides

• Moon phases, underwater currents, and earthquakes

Discuss the role of ocean water in the carbon cycle.

• Ocean water absorbs and stores oxygen from the atmosphere

• Ocean water has no role in the carbon cycle

• Ocean water releases carbon dioxide into the atmosphere

• Ocean water absorbs and stores carbon dioxide from the atmosphere.

Explain the concept of upwelling and its significance in ocean ecosystems.

• Upwelling is the process of warm, nutrient-poor water sinking to the ocean floor, causing a decrease in nutrients for ocean ecosystems.

• Upwelling is the process in which cold, nutrient-rich water from the deep ocean rises to the surface, bringing essential nutrients to support ocean ecosystems.

• Upwelling is the process of water moving horizontally along the ocean surface, without any impact on the nutrient levels in the water.

• Upwelling has no significance in ocean ecosystems and does not affect the nutrient levels in the water.

How do pollutants affect ocean water quality?

• Pollutants have no impact on ocean water quality

• Pollutants can degrade ocean water quality by introducing harmful chemicals, toxins, and waste.

• Pollutants improve ocean water quality by adding nutrients

• Pollutants have a neutral effect on ocean water quality

Discuss the importance of ocean currents in the distribution of heat around the globe.

• Ocean currents help in distributing heat around the globe.

• The temperature of the ocean has no effect on global heat distribution

• Heat distribution is solely dependent on air currents

• Ocean currents have no impact on the distribution of heat

What are the measures that can be taken to protect the ocean environment from human impact?

• Increasing plastic pollution, promoting overfishing, creating marine unprotected areas, and encouraging unsustainable tourism

• Reducing plastic pollution, controlling overfishing, creating marine protected areas, and promoting sustainable tourism