NEW
Font size
WorksheetsChemistry of Life
Total questions: 54
Worksheet time: 31mins
Large bodies of water, such as lakes and oceans, do no quickly fluctuate in temperature. What is the reason behind this phenomenon?
Water is an acid
Water has a high heat capacity
Water is a universal solvent
Water acts as a base
Water is essential for life. Its special properties make water the single most important molecule in plant life. Which of the following properties of water enables it to move from the roots to the leaves of plants?
Water expands as it freezes
Water is an excellent solvent
Water exhibits cohesive behavior
Water is able to moderate temperature
What property of water helps to moderate Earth’s temperature and even our constant internal body temperature?
Cohesion
Adhesion
Density
Specific heat capacity
A water strider can skate along the top of a pond because:
Low surface tension of water
Hydrogen bonds result in water cohesion (surface tension)
Covalent bonds result in water cohesion
Water striders have adapted to take advantage of water cohesion
Why does ice stay at the top of oceans instead of sinking to the bottom?
Ice is colder than liquid water
Ice is less dense than liquid water
Ice is more dense than liquid water
Ice is warmer than liquid water
Water is often called the “universal solvent” because many substances can be dissolved in water. What property of water allows it to be such a universal solvent?
Purity
Polarity and cohesion
High heat capacity
Expansion upon freezing
Why does ice float?
As water freezes, it expands and its density decreases.
As water freezes, air becomes trapped between the hydrogen bonds of water molecules.
As water freezes, it takes up more hydrogen from the atmosphere, causing it to have greater buoyancy (floating ability).
As water freezes, it takes up more oxygen from the atmosphere, causing it to have greater buoyancy.
Substance in a solution that dissolves the other substance and is present in the greater amount:
Solute
Acid
Solution
Solvent
The ability of water molecules to stick together is called:
Adhesion
Cohesion
Transpiration
Solvency
Water is polar because:
The molecule has two poles, at which it is colder than the other regions of the molecule.
The water molecule is neutral
The unequal sharing of electrons gives the water molecule a slight negative charge near its oxygen atom and a slight positive charge near its hydrogen atoms.
The unequal sharing of electrons gives the water molecule a slight negative charge near its hydrogen atoms and a slight positive charge near its oxygen atom.
The bonds within a water molecule are:
Polar covalent
Hydrogen
Ionic
Non-polar covalent
Which of the following is a function of a carbohydrate?
Provides long term energy to body
Supports the body in building structures necessary for survival
Provides short term energy to the body
Gives the body instructions for how to build our body's structures
Which of the following best describes a situation where the body needs more protein?
When in need of energy for sprinting
When weight lifting
When in need of energy for a marathon
What are the smallest basic units of matter?
molecules
atoms
elements
7th graders
What subatomic particles are found in energy levels outside of the nucleus and have a negative charge?
Neutrons
Protons
Electrons
Isotopes
A substance formed by two or more different elements defines a/an
Isotope
Nucleotide
Compound
Elements
What type of bond is formed between atoms of different charges? (gain or lose atoms)
Covalent
Compound
Ionic
Elemental
Carbohydrates, Lipids, Proteins, and Nucleic Acids are the biomolecules/macromolecules that make you up.
True
False
__________ are organic compounds that are good sources of energy. They contain carbon, hydrogen, and oxygen
Protein
Lipids
Carbohydrates
Nucleic Acids
Simple sugars, or monosaccharides, such as glucose are the building blocks of
Lipids
Carboydrates
Protein
Nucleic Acids
The building blocks of ______ are fatty acids, which contain a carboxyl group and a hydrocarbon chain.
Proteins
Carbohydrates
Lipids
Nucleic Acids
Monomers are
Building blocks
Houses
Compounds
Elements
A single subunit of a biomolecule is called a polymer, while a group of subunits of a biomolecule is called a monomer.
True
False
Which of the following is not considered a major element of life?
Carbon
Oxygen
Nitrogen
Calcium
Hydrogen
Matter is____
the pull of gravity on
an object.
Space
anything that
occupies space or has mass.
study of life
Each element of the periodic table is composed of how many atoms?
1
2
3
4
What subatomic particles are found in the nucleus and have no charge?
Protons
Elements
Neutrons
Electrons
The elements that make up carbohydrates are
C,H,O
C,H,O,P
S, H, C, P
All the elements
"Big 6"
Are lipids nonpolar? (hydrophobic)
True
False
Amino Acids are monomers for
Carbohydrates
Lipids
Protein
Nucleic Acids
The function of Nucleic Acids is
Store Energy
Use energy
to store and transmit genetic
info
to transport oxygen throughout the body
Nucleotides are monomers for Nucleic Acids
True
False
Polymers are broken up and turned into monomers by which process
Covalent Bonding
Ionic Bonding
Hydrolysis
A process called ______ combines smaller molecules
together to form these larger
macromolecules.
Hydrolysis
Polymerization
Cohesion
Adhesion
Atoms share pairs of Electrons in what kind of bond
Covalent
Ionic
Electrical
Cohesive
In an Ionic bond, if you lose an electron, the charge is negative
True
False
Ion is an atom that has gained or
lost one or more electron.
True
False
Atoms that gain electrons are called ____ ion
Positive
Negative
Neutral
