1. What are surface currents? A current is a stream of moving water that flows through the ocean. Surface currents are caused mainly by winds but not daily winds. Surface currents are caused by the major wind belts.
2. How do surface currents differ from deep ocean currents? Unlike surface currents, which are driven by interactions with sun and wind, deep currents are caused by the interaction between temperature and water density. The higher the salt content of water, the more dense it is.
3. Give three main factors that affect surface currents. Surface currents are controlled by three factors: global winds, the Coriolis effect, and continental deflections. surface create surface currents in the ocean. Different winds cause currents to flow in different directions. objects from a straight path due to the Earth's rotation.
4. Indicate whether true or false. Explain why this is so. La Nina is quite the opposite of El nino. El Niño and La Niña are opposite phases of what is known as the El Niño-Southern Oscillation (ENSO) cycle. The ENSO cycle is a scientific term that describes the fluctuations in temperature between the ocean and atmosphere in the east-central Equatorial Pacific (approximately between the International Date Line and 120 degrees West).
La Niña is sometimes referred to as the cold phase of ENSO and El Niño as the warm phase of ENSO. These deviations from normal surface temperatures can have large-scale impacts not only on ocean processes, but also on global weather and climate.
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Answer:
1. A
2. B
Explanation:
1. In a sustainable practice, resources are used judicially to fulfill the current demand and also preserved for catering the demand of future generation. The overall objective is to save resources.
In crop rotation, the agricultural field is used effectively by growing crops with alternate nutrients and mineral demand. Also this saves the soil from getting eroded and allows the land to replenish its lost minerals and nutrients.
Hence, option A is correct
2.
This is a linear food chain and as per the sequence given in question it is clear that water fleas feed upon algae. Thus, if population of algae reduces, the population of water fleas will also decrease.
Option B is correct
Answer:
d) trace minerals
Explanation:
Boron (B) and molybdenum (Mo), two of the seven essential micronutrients, also known as trace elements, are required for the normal growth of most plants.
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