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A compound is a substance composed of atoms of two or more different elements. An ionic bond is a chemical bond formed by the attractive forces between two ions of opposing charge. An example of a compound with an ionic bond is sodium chloride.

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Elements in Lipids- Carbon, hydrogen, and small amounts of oxygen
Functions-Used for energy storage, insulation and protective coverings
Examples-oils, waxes and steroids

Lipids are insoluble in water which means their molecules are nonpolar.

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What elements are found in carbohydrates?
Carbon, hydrogen, and oxygen
What are the functions of carbohydrates?
They provide energy for the body.
What are 4 examples of carbohydrates?
Potato, Liver, cotton, and banana

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What is a solution?
- A mixture in which on or more substances (solutes) are distribtued evenly in another substance (solvent)
Examples
Solute
- Substance disolved in the solvent
Solvent
-Liquid that disolves a solute
Two reasons solutions are important to life
- They allow important substances like vitamans, water, and salt to move through your body
- Helps delute/defuse things like if you have to much salt, if you add water it will disolve the salt

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- A Molecule is a group of atoms bonded together.
-A Covalent Bond is a chemical bond that involves the sharing of electrons.

Examples:
- Sugar
- Fats
- Protein
- Water

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Define/Describe a polar molecule: A molecule with an unequal distribution of charge; that is each molecule has a positive end and a negative end.

Since water is polar and has positive and negative ends, it can attract many ionic compounds such as salt and many other polar molecules such as sugar.

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Which four elements make up 96% of the human body?
Carbon, Hydrogen, Oxygen, and Nitrogen
Define/describe ATOMS:
They are small particles that are the basic building blocks of all matter.
Identify/describe the CHARGE and LOCATION of EACH of the following:
Protons: Positive and in the nucleus
Neutrons: Neutral and in the nucleus
Electrons: Negative, outside of the nucleus
Which claim is true: Elements make-up atoms, -OR- Atoms make-up elements.
Atoms make-up elements because elements are made up of atoms.

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Proteins are the building blocks of many important molecules. Functions of proteins include:

-speeding up reactions (enzymes)

-helping molecules get into/out of cells (transport)

-support/structure- muscle for example

The elements found in proteins are:

-Nitrogen

-Carbon

-Hydrogen

-Oxygen

-Sulfur

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Elements found in nucleic acids- Carbon, hydrogen, oxygen, nitrogen & phosphorous
2 Examples of nucleic acids- DNA & RNA
DNA stands for: Deoxyribonucleic acid
DNA's function- The information forms all of organisms' enzymes & structural proteins
RNA stands for: Ribonucleic acid
DNA & RNA work together to make: proteins

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Define/describe pH:
A measure of how acidic or basic a solution is.
Identify the pH of each of the following:
Acid: Below 7
Base: Above 7
Neutral: 7
Give an example of each of the following:
Strong Acid: Lemon
Weak Acid: Milk
Neutral: Water
Weak Base: Egg
Strong Base: Drain Cleaner