| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.07 |
| Score | 0% | 61% |
Meteoroids, meteors and meteorites are categorized based on which of the following?
their density |
|
their temperature |
|
their location |
|
their size |
Smaller rocks shed by asteroids and comets are called meteoroids. When these rocks reach Earth's atmosphere, they burn up in the mesosphere and become meteors. If a meteor manages to reach the Earth, it is called a meteorite.
Which of the following indicates the correct reproductive sequence?
ovum → fetus → zygote |
|
zygote → ovum → fetus |
|
none of these are correct |
|
ovum → zygote → fetus |
During intercourse, the penis ejaculates sperm, produced in the testes, into the vagina. Some of the sperm makes their way to the uterus where, if they encounter an egg to fertilize, unite with the ovum to form a fertilized egg or zygote. The zygote then may implant in the uterus and eventually develop into a fetus.
Elements that belong to the same period in the Periodic Table of the Elements have the same number of:
protons |
|
electrons |
|
atomic mass units |
|
electron shells |
The rows of the Periodic Table are called periods and contain elements that have the same number of electron shells ordered from lower to higher atomic number.
In a eukaryotic cell, which organelles deal with proteins?
ribosomes |
|
Golgi apparatus |
|
all of these deal with proteins |
|
endoplasmic reticulum |
The nucleus of a eukaryotic cell contains the genetic material of the cell and is surrounded by cytoplasm which contains many organelles. Ribosomes produce proteins, endoplasmic reticulum helps synthesize proteins and fats, and Golgi apparatus prepares proteins for use.
Which of the following is not a base unit in the metric system?
degree Fahrenheit |
|
meter |
|
liter |
|
gram |
The Fahrenheit scale is used for measuring temperature in the British system. The metric system uses the Celsius scale.