Fossil fuels are raw material for energy production. They are non-renewable natural resources, originated from organic debris accumulated in the earth's crust millions of years ago.
These fuels are called fossils because they originated from the remains of animals and plants that lived in ancient times. These organic remains have been deposited over thousands of years in very deep layers of the earth's crust and transformed by the action of temperature and pressure.
Fossil fuels are non-renewable resources which means that they are found in nature in limited quantities, so once their stocks are exhausted there is no way to replenish them.
Answer: Teenagers who are identified as addicted to cigarettes represent the "POSITIVE RESULT SAMPLE", while those teens who participate in the study represent the "RESULT SAMPLE".
Explanation: In a research, the variables used to produce a result are called samples. A research result comprise of positive and negative samples.
Those samples that test positive to our research are called the positive samples, while those that do not test positive are called the negative sample, all the samples that participated in the research, bother the positive and negative are called the result samples.
All the teens that participated in the event are called the result samples, because they help the research to produce a balanced result. While those teens that are addicted to nicotine are the positive samples, because it helped the research to show a different from other samples.
Answer:
Alzheimer's disease
Explanation:
Alzheimer's disease -
It is the type of disease , which targets the brain and disturbs the process of thinking and can even destroy it completely .
This disease is commonly observed in the in 30's and in mid 60's .
The most common cause of this disease is dementia in the older adults .
The symptoms of this disease are -
Hence ,
Hilda is suffering from Alzheimer’s disease .
Answer: Yes
Explanation: This will increase the time frame of the project because the scope has widened( I.e more deliverables) it will require more time to achieve what has changed since it was not in the plan initially and initial plan has a timeframe ,so as the scope widens ,timeframe increases .
