Expectancy theory is about what one expects, the way they think when they are making a decision.
The Endosymbiotic Theory is a theory about how mitochondria and chloroplasts formed. The theory suggests that both the mitochondria and chloroplasts were once prokaryotic cells that were ingested but not digested by eukaryotic cells. This would explain why both have their own DNA.
A theory models or explains why something is the way it is or how something works. If at some point a scientist find this theory to be inadequate (doesn't fully explain/describe it) due to recent research he/she may have done the theory will need to be modified to include the latest discoveries.
Spontaneous generation suggests that the earthworms fell from the sky
That would depend on the scientific theory in question.
Well first.. I would research information about the world. And then I would talk about it. That is how you explain the world.
I would use the word "theory" in a sentence like this: "The scientist presented a new theory to explain the findings of the experiment."
the theory of evolution
http://www.niaaa.nih.gov/ == == Pretty much a waste of time.
You could use spectroscopy to analyze the light emitted by the sun to look for the characteristic spectral lines of platinum. If you detect these specific spectral lines in the sun's spectrum, it would support the theory. Conversely, if you do not find these lines in the sun's spectrum, it would provide evidence against the theory.
The expectancy was that he would win, but they were surprised at his score.
People in Australia would expect to have a higher life expectancy than people in Africa. There are lots of very well developed parts of Africa where people would have a high life expectancy, but on average it would have a lower life expectancy.
This condition would have no impact on life expectancy.
The Endosymbiotic Theory is a theory about how mitochondria and chloroplasts formed. The theory suggests that both the mitochondria and chloroplasts were once prokaryotic cells that were ingested but not digested by eukaryotic cells. This would explain why both have their own DNA.
One strategy that would have the least positive impact on life expectancy is lack of exercise. Keeping fit and healthy is important in improving life expectancy.
Scientists make observations about the natural world through experiments and try to explain the phenomena that they observe. Scientists then attempt to explain the occurence of all of these observations in an overarching theory. For example, an observation would be seeing an apple fall to the ground and making measurements. The next step would be taking all of these observations which could include things such as the movement of planets and other cosmic bodies to form the theory of gravity which attempts to explain these observations.
ritualism
This is a common misconception. A theory is an idea that has been proven over and over through time and through many experiments, Such as the theory of gravity: The media usually confuses this with a Hypothesis, which would explain your confusion.