When air at the surface diverges, airflow above must__

Answer: A. A scientific paper is a reliable source of information.

Explanation:

A peer review is a kind of analysis of the research outcome by the people who generally exhibit the same competency as that of the author or researcher and knowledge for a particular subject or topic in which the research has been conducted. Such a process makes the research outcome more authentic and reliable. The author learns to improvise the research process and corrects the mistakes after the peer review.

Answer:

The correct answer is : A scientific paper is a reliable source of information.

Natural casts

Natural casts are fossils that consistof minerals that are filled in an open mold of an organism. This type of castsis made when minerals are deposited in the mold. Casts can also be syntheticallyproduced when the molds are filled with synthetic material such as latex.

Answer;

An example of positive feedback loop is;

-When a pregnant woman begins to go into labor, the body sends hormones that increase the intensity of the labor contractions.

Explanation;

-Feedback loops are therefore the process whereby a change to the system results in an alarm which will trigger a certain result. The result will  then either increase the change to the system or reduce it to bring the system back to normal.

-Feedback loops are important because they allow living organisms to maintain homeostasis (maintenance of internal environment of the body constant).

-A positive feedback loop occurs in nature when the product of a reaction leads to an increase in that reaction.  It moves a system further away from the target of equilibrium, by amplifying the effects of a product or event and occurs when something needs to happen quickly.

Final answer:

A positive feedback loop in biology is a process in which the end product of an action stimulates more of the same action to occur. An example is during child birth, where hormone release intensifies labor contractions, leading to further hormone release. This continues until the process is complete, differentiating from negative feedback loops which work to maintain homeostasis by reversing a process.

Explanation:

A positive feedback loop in biological systems is a process in which the end products of an action cause more of that action to occur. This contrast with a negative feedback loop, which works to stop a process in order to bring the body back to its set point. One of the examples provided is a classic example of a positive feedback loop: when a pregnant woman begins to go into labor, the body sends hormones that increase the intensity of the labor contractions.

This is a positive feedback loop because the contractions that begin labor lead to the release of a hormone (oxytocin) that intensifies those contractions, which then causes more hormones to be released, and so on until the baby is born.

Other instances, such as when blood sugar is low or the heart rate is high, are illustrations of negative feedback loops, where the body works to maintain homeostasis by reversing a process.

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Making observations is the step of scientific method in which information is obtained through the senses.  

Making an observation is the first step of scientific method where scientists gets curious about a natural occurrence or a phenomenon.

Further Explanation.

• Scientific method involves a process where researchers or scientists search for answers to certain questions and solutions to problems.
• Scientific methods are used by scientists or researchers to test a given hypothesis.

Steps involved in Scientific method

Making an observation and asking question.

• Making observation is the first step of any scientific process. The scientists make observations about a natural phenomenon.

• After making observations scientist asks a question about an observed phenomenon or pattern.  

• Observations may be qualitative where the occurrences are described in ways that do not use numbers or quantitative where observations contain numbers and other features.

Formulating a hypothesis

• Hypothesis refers to probable answers to the question asked and one that can be tested experimentally. Hypothesis is therefore a possible explanation for a given observation or occurrence.

• For the observation that we experience alternating periods of light and darkness that correspond to the movement of the sun, moon, and clouds. The hypothesis here would be; The earth rotates on its axis for 24 hours, thus, exposing one side to the sun or else the sun revolves around the earth for twenty four hours.

Designing and performing experiments

• Suitable experiments be carried out  to test the  validity of the hypothesis formulated.

• Experiments refers to organised measurements or observations normally made under controlled environment.

Accept or modify the Hypothesis  

• The experiment conducted helps the researchers or scientists to determine whether the hypothesis formulated is valid. If the hypothesis is valid then they proceed to the next step of scientific method.

• However, if the experiments demonstrate that the hypothesis is incorrect then it must be corrected for further experimentation.

Developing a law and/or a theory  

• After conducting experiments and analyzing the results obtained, the researchers may test whether the results are reproducible and hence a law may formulated to allow general prediction.

• A scientific law describes a phenomenon or pattern, it describes what happens but does not explain why.

Key words: Scientific method, making observation

Learn more about;  

1. Scientific method; brainly.com/question/1506591
2. Steps involved in scientific method: brainly.com/question/1506591

Level: high school  

Subject: Biology

Topic: scientific method  

Sub-topic: steps involved in scientific method