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How has the percentage of carbon dioxide changed in the last 4500 million years?
The percentage of carbon dioxide in the atmosphere has varied significantly over the last 4500 million years. There have been periods with much higher CO2 levels, such as during the early Earth with levels over 100 times higher than today, and periods with much lower levels, like during the last ice age around 20,000 years ago. However, the rapid increase in CO2 levels over the past century due to human activities is unprecedented in Earth's history.
How many million of years ago did Earth's atmosphere attain the oxygen levels it has today?
It took approximately 2.4 billion years for Earth's atmosphere to reach oxygen levels similar to what we see today. This increase in oxygen was primarily due to the photosynthetic activity of early cyanobacteria, which released oxygen as a byproduct.
Describe how did oxygen come to make up to 21 percent of earths present atmosphere?
Oxygen accumulates in Earth's atmosphere from photosynthesis, where plants and algae convert carbon dioxide into oxygen. This process started with the emergence of photosynthetic organisms around 2.5 billion years ago, gradually increasing oxygen levels to the current 21 percent.
How high has sea levels risen in the last 100 years?
Sea levels have risen by about 8 inches (20 cm) in the last 100 years, with the rate of rise increasing in recent decades due to climate change. This rise is primarily attributed to thermal expansion of warming oceans and the melting of glaciers and ice caps.
What is the term used to describe permanently frozen subsoil in Siberia?
The term used to describe permanently frozen subsoil in Siberia is permafrost. It consists of soil, rock, or sediment that remains at or below 0 degrees Celsius for at least two consecutive years.
What type of graph would be best to display growth over the last 5 years?
The best graph in my opinion would be a line graph . Line graphs are used in most buisness graphs .
Would the number of hurricanes in the US in the past ten years be a bar graph or a circle graph?
It'd probably be a line graph, but out of those two, I'd say bar graph.
What type of graph would best show the highest and lowest temperature for each of the last four years?
line graph
What type of graph has the x-axis has evenly spaced years and the y-axis increases by multiples of ten?
That would be a line graph.
Which type of graph would best show the number of people who attended the talent show each year for the last ten years?
A line graph would be the most suitable.
How would you create a graph showing the number of airplane miles traveled in the US over the past ten years?
Obtain the data, put it in a table, graph it.
How would you describe your ideal career?
I have 2 years of experience in Accounts payable. How i Can describe the same?
How would you describe the history of Peru?
about 15,200 years ago
Would a line graph or bar graph be better for showing how many dead fish were found each year over the past ten years?
Bar, it is easier to see
What is a word for the numbers that are placed at fixed distaces on a graph to help label the graph?
Not aware of a specific word. After working 30 years in statistics, I would refer to them as "tick mark values"!
Which type of graph would you use to show the price of a stick of butter over the past 50 years?
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How would you describe the early years of development?
the early years are really cool, dont look on wiki
