| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.52 |
| Score | 0% | 70% |
Which of the following is not true about simple magnets?
all of these are untrue |
|
opposite poles repel each other |
|
same poles repel each other |
|
opposite poles attract each other |
Simple magnets have two poles, north and south, and opposite poles attract each other (N attracts S, S attracts N). Likewise, the same pole of two magnets repel (N repels N, S repels S). The Earth has a magnetic field and North and South Poles which enables the use of a magnetic compass to determine direction.
A subatomic particle that orbits the nucleus of an atom. It carries a negative electric charge. This desribes which of the following?
isotope |
|
proton |
|
electron |
|
neutron |
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.
In taxonomy, domains are the broadest classification of life. How many domains are there?
5 |
|
6 |
|
dozens |
|
3 |
The broadest classification of life splits all organisms into three groups called domains. The three domains of life are bacteria, archaea and eukaryota.
A human heart consists of how many chambers?
2 |
|
1 |
|
4 |
|
8 |
The heart is the organ that drives the circulatory system. In humans, it consists of four chambers with two that collect blood called atria and two that pump blood called ventricles. The heart's valves prevent blood pumped out of the ventricles from flowing back into the heart.
Convert 0C° to F°.
-32 |
|
0 |
|
16 |
|
32 |
To convert from C° to F° use:
\(F° = {9 \over 5}C° + 32\)
\(F° = {9 \over 5}(0) + 32\)
\(F° = 0 + 32 = 32\)