| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.52 |
| Score | 0% | 70% |
Which of the following is a decomposer?
fungi |
|
pine tree |
|
mosquito |
|
ferret |
Decomposers (saprotrophs) are organisms such as bacteria and fungi that break down the organic matter in the dead bodies of plants and animals into simple nutrients.
Which of the following is not true of light waves?
are mechanical waves |
|
travel faster than sound waves |
|
are electromagnetic waves |
|
can travel through a vacuum |
Unlike mechanical sound waves that require a physical medium for propagation, light waves are electromagnetic and can travel through empty space. Light waves are also much faster, travelling at 186,000 m/s vs. 343 m/s for sound waves.
__________ is caused by a lack of Vitamin C.
shingles |
|
scurvy |
|
diabetes |
|
anemia |
Scurvy is a difficiency disease caused by a lack of Vitamin C in the diet.
Elements in the Periodic Table of the Elements are ordered by which of the following?
atomic weight |
|
atomic number |
|
number of electron shells |
|
atomic mass |
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.
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?
radiation |
|
reflection |
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conduction |
|
convection |
Convection is the transfer of heat by the circulation or movement of the heated parts of a liquid or gas.