| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.27 |
| Score | 0% | 65% |
Cellular fermentation takes place:
in the presence of oxygen |
|
aerobically |
|
anaerobically |
|
in plant cells |
If no oxygen is present, cellular respiration is anaerobic and will result in fermentation where either lactic acid or alcohol is used instead of oxygen.
In the Periodic Table of the Elements, atomic number is equal to which of the following?
number of protons in the nucleus |
|
number of protons + neutrons in the nucleus |
|
number of neutrons in the nucleus |
|
number of electrons orbiting the nucleus |
The Periodic Table of the Elements categorizes elements primarily by the number of protons in their nucleus (atomic number) and secondarily by the characteristics they exhibit.
Generally, an atom has __________ negative electrons orbiting the nucleus as it does positive protons inside.
more |
|
fewer |
|
double the number of |
|
equal numbers of |
An electron is a subatomic particle that orbits the nucleus of an atom. It carries a negative electric charge. Generally, an atom has the same number of negative electrons orbiting the nucleus as it does positive protons inside.
Water coming to a boil on a stove, ice melting, and steam from a cup of coffee are all examples of which of the following?
conduction |
|
radiation |
|
convection |
|
reflection |
Convection is the transfer of heat by the circulation or movement of the heated parts of a liquid or gas.
Which of the following describes the Earth's mantle?
makes up most of Earth's volume |
|
all of these |
|
dense |
|
hot |
Mantle makes up 84% of the Earth's volume and has an average thickness of approximately 1,800 miles (2,900 km). It is dense, hot, and primarily solid although in places it behaves more like a viscous fluid as the plates of the upper mantle and crust gradually "float" along its circumference.