Answer:
Ionic compounds are formed by the transfer of elecrons from highly electropositive element to highly electonegative element.
Covalent compounds are formed by the shairing of electrons between elements.
Explanation:
Answer:
Carbon cycle may be defined as a type of biogeochemical cycle that regulates the amount of carbon in nature. The carbon is released by the living animals and utilized by the plants in form of carbon dioxide.
Photosynthesis consumes the carbon dioxide to make carbohydrates where as cellular respiration releases carbon dioxide and breakdown the carbohydrate. Both these process helps in recycling of the carbon in nature and maintains the level of carbon in nature.
<span>Answer: occurs when the aortic and pulmonary valves backfill with blood</span>
The second heart sound,that is heard in normal hearts, is generated by the closing of the semilunar valves((the aortic valve and pulmonary valve). Before that, the first sound corresponds to the closing of the atrioventricular valves.
your answer is C. The EPA under the Toxic Substances Control Act also referred to as the TSCA are responsible for setting rules and regulations regarding polychlorinated biphenyl, PCB. Tina should reference the TSCA to help support her protest against the very toxic chemicals and compounds in PCB.
<u>Answer:</u>
B. Theories are broad explanations based on many observations and experiment
This statement accurately describes a scientific theory
<u>Explanation:</u>
Scientific theory can be defined as hypothesis which have been supported through research which is using the scientific method. Hypothesis is simply educated guess. It is the beginning stage of the scientific theory
There are many characteristic of scientific theory. These characteristics are testable, replicable, stable, simple and consistent. A theory explains the findings made throughout the review process. A scientific theory may not be the scientific test's final outcome; Scientific theories are interpretation of scientists. It can be changed or sometimes also rejected.
