Answer:
Calcium
Explanation:
Between Neon and Calcium, neon will be more stable compared to the calcium.
Neon belongs to the group of elements on the periodic table called the noble gases. These are the most stable elements and they do not react with other elements.
- Calcium on the other hand is reactive
- It requires a loss of two electrons to attain stability.
- Therefore, it is a more reactive element.
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:
less reliable production of heat
Explanation:
solar power is typically "banked" on a battery after heat is turned in to power. but how about cloudy days or winters that don't get much sun, how much power is collected then??
They are Exosphere,Thermosphere,Mesosphere,Startosphere and Troposphere