| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 2.98 |
| Score | 0% | 60% |
The gravitational interaction of Earth and the Moon is responsible for which of these?
seasons |
|
tides |
|
day and night cycle |
|
the northern lights |
Tides are caused by the gravitational interaction of Earth and the Moon.
Elements in the same group in the Periodic Table of the Elements have the same:
number of electrons in their outer electron shell |
|
number of electron shells |
|
number of atomic mass units |
|
number of electrons |
The columns of the Periodic Table are called groups and all elements in a group have the same number of electrons in their outer electron shell. The group that an element occupies generally determines its chemical properties as the number of outer shell electrons establishes the way it reacts with other elements to form molecules. So, because each element has the same number of electrons in its outer shell, each has similar reactivity.
Meteoroids, meteors and meteorites are categorized based on which of the following?
their density |
|
their size |
|
their location |
|
their temperature |
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.
In the heart, blood flows from the __________ ventricle to the lungs then back to the heart via the __________ atrium.
left, right |
|
left, left |
|
right, right |
|
right, left |
The two largest veins in the body, the venae cavae, pass blood to the right ventricle which pumps the blood to the lungs through the pulmonary artery. Blood picks up oxygen in the lungs and returns it to the left atrium via the pulmonary vein.
Which of the following represents the largest value?
1 mL |
|
1 kL |
|
1 ML |
|
1 cL |
Mega (M) is 106, kilo (k) is 103, centi (c) is 10-2, milli (m) is 10-3 so 1 ML represents the largest value.