| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.08 |
| Score | 0% | 62% |
Which of the following is not true of light waves?
are electromagnetic waves |
|
are mechanical waves |
|
travel faster than sound 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.
The gravitational interaction of Earth and the Moon is responsible for which of these?
the northern lights |
|
day and night cycle |
|
seasons |
|
tides |
Tides are caused by the gravitational interaction of Earth and the Moon.
Which of the following indicates the correct reproductive sequence?
zygote → ovum → fetus |
|
ovum → zygote → fetus |
|
none of these are correct |
|
ovum → fetus → zygote |
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.
Convert 5C° to F°.
41 |
|
-23 |
|
37 |
|
27 |
To convert from C° to F° use:
\(F° = {9 \over 5}C° + 32\)
\(F° = {9 \over 5}(5) + 32\)
\(F° = {45 \over 5} + 32\)
\(F° = 9 + 32 = 41\)
Which of these is not a function of bone in the human skeletal system?
store vitamins |
|
produce blood cells |
|
protect bodily organs |
|
store minerals |
Hard bones provide primary support for the endoskeleton while more flexible cartilage is found at the end of all bones, at the joints, and in the nose and ears. In addition to providing support and protecting bodily organs, bones also produce blood cells and store minerals like calcium.