Answer:
The orbit of the Earth
Explanation:
It is widely speculated that orbital mechanics were responsible for the period of lushness that the Sahara desert and Northern Africa lived only 6000 years ago. Due to the changes in the Earth's orbit around the Sun, it is thought that the monsoon effect (season variations in wind patterns that produce a heavy rainy season) was more pronounced across the northern latitudes and resulted in the Sahara being much wetter than it is today.
As global temperatures decrease, ice cover increases causing higher albedo which causes temperature to continue to drop is an example of positive mechanism.
<h3>What is Ice Albedo?</h3>
A significant component of global climate change is ice-albedo feedback. Surface albedo falls in the polar zone as snow and ice area declines, and the intensified solar heating further reduces the snow and ice area.
A positive feedback loop is exemplified by the ice-albedo feedback. A feedback loop is a cycle within a system that alters the impact on it, either positively or negatively.
Therefore if ice cover increases then the global warming is decreases as climatic conditions changes. It is a positive feedback.
To know more about Ice Albedo refer:
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The 3 benefits in obtaining Leanership and SETAs to a learner's perspective includes:
1. Quality and Relevance Training - what you will learn has practical relevance, knowing relevant theoretical basis and the quality of education and training is improved.
2. <span>Development of Applied Competence Required in the Workplace - once your part of it, you are expected to perform well in job-related tasks and you should do it, you will understand what you are doing and you will surely learn from it.
3. </span><span>National recognition of competence - you are given a wider application than any other single workplace. You are introduced of obtaining a lot opportunities that are nationally recognized qualifications.</span>
In general, they are on the edges of continents, where you find mountain ranges, regular earthquakes and active volcanoes - Eg: South America and Asia.
Answer:
53.2%
Explanation:
- Write the mass of the elements in your molecule:
Mass of Si in 1 mol SiO2 =28.1g
Mass of O in 1 mol SiO2 =16x2g= 32g
- Now find the mass of your compound
Mass of compound= 28.1+32=60.1
- Divide each element's mass by the mass of the compound to find the percent by mass following this formula:
% by mass = (mass of element/mass of compound) x 100
% by mass of oxigen= (32g/60.1) x 100
% by mass of oxigen= 53.2%
I hope you find this information useful and interesting! Good luck!
