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Which has a 2D hexagonal layered structure?
What structure is shown in the diagram?
Which has every carbon atom covalently bonded to four other atoms?
Which is used as a cutting tool and in jewelry?
Carbon is arranged in what shape to make diamond?
Humans absorb oxygen from the air they breathe in and exhale carbon dioxide gas, CO2. Carbon dioxide gas is
an element made of carbon and oxygen atoms.
a solution made of carbon and oxygen atoms.
a compound of carbon and oxygen atoms.
a mixture of carbon and oxygen atoms.
Which of the following is the most important source of organic carbon compounds?
Which of the following is true for all hydrocarbon?
They have carbon and hydrogen atoms only in the molecule.
They have carbon, oxygen and hydrogen atoms in the molecule.
They are in the same homologous series.
They are saturated compounds.
Carbon is able to bond with atoms of other elements in many different ways because it has
six valence electrons
four valence electrons
Which form of pure carbon is formed of layers that slide past one another?
What is another name for carbon compounds?
Proteins are nutrients used in the body mostly for
building and repairing body parts
making fatty acids
a source of vitamins
What is the name of the process by which fossil fuels are burned?
What is the name of the process by organisms break down glucose and carbon dioxide is released?
Which compounds contain carbon?
Nucleic acids (DNA)
All of the above
At which number does photosynthesis take place?
At which number does the burning of fossil fuels take place?
At which number does the animal respiration take place?
At which number does the decomposition of living organisms take place?
At which number does consumption of plant material take place?
Which two process release carbon dioxide into the air?
Combustion and respiration
Combustion and photosynthesis
Photosynthesis and respiration
Photosynthesis and decomposition
The reverse of photosynthesis - Sugars are used for metabolism and change “fuel” back into CO2.
Carbon enters the soil through dead plant or animal matter.
Organic matter, burred over millions of years
If the plant population decreased, the amount of carbon would _________.
Stay the same
Which is a true statement?
Humans depend on oxygen, plants depend on carbon dioxide
Plants produce carbon dioxide
Humans depend on carbon dioxide, plants depend on oxygen
Humans don't depend on plants for the air they need
Which describes the relationship between plants and animals in the carbon cycle?
Plants produce and release oxygen that animals need
Plants produce and release carbon dioxide that animals need
Animals produce and release oxygen that plants need
Animals produce oxygen that plants turn into carbon dioxide
C6H12O6is also known as glucose (sugar). Where is it found?
Both plants and animals
Neither plants or animals