Answer:
If an atom has an equal number of protons and electrons, its net charge is 0. If it gains an extra electron, it becomes negatively charged and is known as an anion. If it loses an electron, it becomes positively charged and is known as a cation.
Explanation:
Answer: Frog
Explanation: It is the frog because the less differences there are, the more closely related it is to the organism.
Answer:
Disadvantages
Primarily made from non-renewable sources including fossil fuel
Provide nutrients to plants but nothing to sustain soil
Chance of over fertilization, that may damage crop and entire soil ecosystem
Leaching and move to rivers and sea causing eutrophication
Repeated application may lead to toxic build up of arsenic, cadmium etc in soil that may be present in fruits and vegetables.
Advantages:
•rapid action
•Constituent ratios defined
Explanation:
Real scientists do not 'use evidence to support' a theory.
Real scientists suggest a theory that can explain the evidence.
The 'big bang theory' can explain our observation that most galaxies
are moving away from us, and the farther from us a galaxy already is,
the faster it's moving away from us.