| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.30 |
| Score | 0% | 66% |
__________ is caused by a lack of Vitamin C.
shingles |
|
scurvy |
|
diabetes |
|
anemia |
Scurvy is a difficiency disease caused by a lack of Vitamin C in the diet.
212°F is how many °C?
-100 |
|
100 |
|
0 |
|
\(135 {5 \over 9}\) |
The formula to convert from F° to C° is:
\(C° = {5 \over 9} (F° - 32)\)
plugging in our values gives:
\(C° = {5 \over 9} (212 - 32)\)
\(C° = {5 \over 9} (180) = {{180 \times 5} \over 9}\)
\(C° = {900 \over 9}\)
\(C° = 100\)
Earth's breathable air is held in which atmospheric layer?
stratosphere |
|
thermosphere |
|
mesosphere |
|
troposphere |
The Earth's atmosphere has several layers starting with the troposphere which is closest in proximity to the surface. Containing most of the Earth's breathable air (oxygen and nitrogen), it's a region with warmer temperatures closer to the surface and cooler temperatures farther away which results in the rising and falling air that generates weather.
In the Periodic Table of the Elements, elements in the same column belong to the same:
period |
|
family |
|
atomic number |
|
group |
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.
Molecules and atoms that are outputs from a chemical reaction are known as which of the following?
side effects |
|
reactants |
|
results |
|
products |
During a chemical reaction molecules and atoms (reactants) are rearranged into new combinations that result in new kinds of atoms or molecules (products).