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WorksheetsChemistry Unit Review
Total questions: 40
Worksheet time: 25mins
Which of the following is the best description of an element?
A substance that cannot be broken down into simpler substances.
A naturally occurring mineral made of more than one substance.
A small particle made with a specific chemical composition.
A collection of atoms that have different abilities when joined together.
How are elements and compounds different?
A compound is represented by a chemical formula, and elements are represented by a chemical symbol.
Compounds are represented by chemical symbols of one letter, and elements are represented by symbols of two letters.
Elements are pure substances, and compounds are not.
Elements are always larger units of matter, and compounds are smaller.
How do covalent bonds form?
by sharing electrons between atoms
by donating or receiving electrons
What two types of atoms make a covalent bond?
2 nonmetals
2 metals
1 metal and 1 nonmetal`
Ionic bonds are between
metals and nonmetals
2 metals
2 nonmetals
How are ionic bonds formed?
transfer of electrons
sharing of electrons
Valence electrons are found
outermost energy level
innermost energy level
some where in the electron cloud
Group numbers on the periodic table help us determine
number of valence electrons
state of the element (solid, liquid, gas)
What is cohesion?
The ability of a molecule to "stick" to itself
The ability of a molecule to "stick" to other molecules
Large amounts of energy are required to change the temperature of a substance
A well-organized and efficient team
What do the green bonds represent?
Covalent Bond
Hydrogen Bond
Ionic Bond
What characteristic is shown in the image?
Polarity
Hydrogen Bonds
Cohesion
Adhesion
This individual is ice fishing. They cut through the top layers of ice to reach the water and fish below. What property of water allows for this to happen?
Expansion Upon Freezing
Universal Solvent
Ability to Moderate Temperature
Cohesive Behavior
What property of water allows for water to act as a temperature regulator for the world?
Cohesive Behavior
Expansion Upon Freezing
High Specific Heat
Universal Solvent
What property of water causes these Alka-Seltzer tablets to dissolve?
Universal Solvent
Expansion Upon Freezing
Cohesive Behavior
High Specific Heat
Blood functions as a transport mechanism to take nutrients and oxygen to all cells in the body. What property of water allows for this to occur?
Expansion Upon Freezing
Universal Solvent
Cohesive Behavior
Ability to Moderate Temperature
Why the water color walking up at the paper towels?
Because the water color attract the paper towels
Because capilary action
Because paper towels and water can mix together
because food coloring very special
A ______________ is a large molecule.
Micromolecule
Polymer
Amino Acid
Macromolecule
Which of the following elements are found in all macromolecules? (Select all that apply).
Which macromolecule is used as our main source of energy?
Lipids/Fats
Nucleic Acids
Proteins
Carbohydrates
Which of the following are examples of carbohydrates? (Select all that apply).
Bread
Pasta
Olive Oil
Cheese
Which macromolecule stores energy?
Carbohydrates
Proteins
Lipids/Fats
Nucleic Acids
Nucleic acids make up which of the two molecules listed below?
FDA
RNA
DNA
FDR
This is one job proteins do not have in the body.
structure for tissues and organs
transport things through cell membranes
speed up chemical reactions
insulation
Which type of fat is considered healthier than others?
Saturated Fat
Unsaturated Fat
Monounsaturated Fats
Trans Fat
Which macromolecule is shown?
lipid
protein
nucleic acid
carbohydrate
Which macromolecule is shown?
lipid
protein
nucleic acid
carbohydrate
