Standard units are common units that can be re-measured easily. Examples: meters, miles, grams, seconds, etc.

Non standard units are more so things than units that can't be measured as easily. Example: 13 pieces of gum in length. Surely you could lay out 13 pieces of gum, but gum varies in size which makes it more difficult to use as an accurate measurement.

The elements are

Carbon (C)

Hydrogen(H)

Oxygen(O)

There are lots of large molecules made with these elements.

Proteins is one. Insulin is another.

Costs and benefits" refers to the concept of evaluating the advantages and disadvantages or the positive and negative aspects of a decision, action, project, policy, or any other situation. It is a fundamental economic and decision-making concept used to analyze the consequences of a choice or an undertaking. Here's what these terms mean:

Costs: These are the expenses, sacrifices, or negative outcomes associated with a particular decision or action. Costs can be monetary, such as the money spent to acquire a product or service, or non-monetary, such as the time, effort, or resources invested. Costs may also include any undesirable consequences or trade-offs resulting from a decision.

Benefits: These are the gains, rewards, or positive outcomes that result from a particular decision or action. Benefits can be in the form of monetary profits, increased well-being, improved quality of life, enhanced efficiency, or any other favorable results. Benefits represent the advantages or benefits of a given choice.

In decision-making, individuals, businesses, and policymakers often conduct a cost-benefit analysis to weigh the costs and benefits associated with a particular course of action. By comparing the potential gains to the potential sacrifices or drawbacks, they can make more informed and rational decisions. A positive net benefit (benefits outweigh costs) typically indicates a favorable choice, while a negative net benefit (costs exceed benefits) suggests a less desirable option.

Cost-benefit analysis is widely used in various fields, including economics, public policy, environmental management, and project management, to assess the pros and cons of different alternatives and to determine whether a particular action is justified or efficient. It helps in evaluating trade-offs and making informed choices to optimize resources and outcomes.

When you change the shape you are also changing the density of the object, like for instance if you take a paper boat and put it into water it will float, but if you shape something into a ball it becomes compact and will sink. that is because its weight is more than what the displaced water weighs.

So your correspondents don't feel offended.

One that deals with "why" or "how" (apex)

anychange works

Cl2 is the symbol of the diatomic neutral molecule of chlorine; the anion chloride is Cl-. The common valence of chlorine is -1.

The "dense" central portion of an atom is called the nucleus. The nucleus of an atom contains neutrons and protons.

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scientifically evil is a figment of man's mind and therefore it depends on who's answering the question a good chunk of the German's during world war two would have balked at the Idea that Hitler was evil while the British and free french to name two. would have had a difference of opinion. Also the obvious group the people in the concentration camps would not have had a favorable opinion of Hitler

1st. century. A century is 100 years, so logically, the first century is 1-100, the second century 101-200, etc.

Sometimes a slightly different calculation is used: first century 1-99, second century 100-199, etc.

AD means "ano domini" - after Christ.

In general, the melting and boiling points of substances depends on the strength of the forces holding the molecules or ions together, the intermolecular bonds.

For example, sodium chloride is a giant ionic crystal lattice consisting of Na+ and Cl- ions. This structure is very strong due to the attractive forces between the ions, so a lot of energy is required to break the ionic bonds and melt NaCl, hence the melting/boiling point being very high.

Conversely, a molecule like methane (CH4) has very little localised charge, it is not polar, and it is a small molecule so the attractive forces between molecules are weak and methane has a low melting and boiling point.

Electrically neutral matter is matter without a charge.

As a general rule in the atmosphere, the higher the elevation the lower the temperature.

However, certain atmospheric conditions may produce an 'inversion', where temperature increases with elevation.

(The constituent particles of an atom are the electron, the proton and the neutron; all three are fermions. However, the hydrogen-1 atom has no neutrons and the hydron ion has no electrons.) WIkipedia

The isotope 'Carbon - 13'.

NB Carbon exhibits three isotopes viz;

C-12 ; 6 protons, 6 neutrons, & 6 electrons (The most common)

C-13 ; 6 protons, 7 neutrons, & 6 electrons (Used in NMR)

C-14 ; 6 protons, 8 neutrons, & 6 electrons (Used in radio-active dating).

When doing experiments you have to have a control group and an experimental group. The control group is not given a drug (for example), while the experimental group is.

This will show (later on) if the drug had a real effect. Sometimes the control group will be given what is called a placebo. This looks just like the drug that the experimental group is given, except it has nothing in it.

Because that piece of charcoal is lighter that the water, so it floats.

Experts who study the past are called historians. They examine primary and secondary sources, such as documents, artifacts, and records, to understand and interpret historical events and societies. Historians often specialize in specific periods, regions, or themes to develop comprehensive knowledge about the past.

I believe it could be both. A natural loss of habitat may be caused by flooding or a forest fire for instance. - A man made loss of habitat could be caused by building a highway or cutting down a forest.

I think is true

While Aristotle made significant contributions to various scientific fields, he did not create the scientific method as we understand it today. The scientific method emerged later during the Scientific Revolution in the 17th century, primarily through the works of prominent scientists like Francis Bacon and Galileo Galilei.