| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.21 |
| Score | 0% | 64% |
Menstruation occurs when:
the fetus is formed |
|
the zygote is formed |
|
the ovum fails to become fertilized |
|
the ovum becomes fertilized |
If the ovum fails to become fertilized, the lining of the uterus sloughs off during menstruation. From puberty to menopause, this cycle of menstruation repeats monthly (except during pregnancy).
What part of the brain is responsible for the major senses (thinking, hearing, seeing)?
medulla |
|
brainstem |
|
cerebrum |
|
cerebellum |
The cerebrum is the major part of the brain and is responsible for the main senses (thinking, hearing, seeing).
Which of the following describes the Earth's outer core?
makes up most of the Earth's volume |
|
primarily solid |
|
solid |
|
liquid |
The Earth's core is divided into the liquid outer core (1,430 miles or 2,300 km radius) and the solid inner core (745 miles or 1,200 km radius).
The pitch of the siren of an approaching ambulance changes as it approaches you. This is an example of which of the following?
refraction |
|
sound radiation |
|
Doppler effect |
|
reflection |
The Doppler effect occurs when the source or listener (or both) of sound waves is moving. If they're moving closer together, the listener perceives the sound with a higher pitch and, when they're moving apart, the listener perceives the sound with a lower pitch.
In taxonomy, domains are the broadest classification of life. How many domains are there?
3 |
|
6 |
|
5 |
|
dozens |
The broadest classification of life splits all organisms into three groups called domains. The three domains of life are bacteria, archaea and eukaryota.