| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 2.92 |
| Score | 0% | 58% |
Molecules and atoms that are outputs from a chemical reaction are known as which of the following?
side effects |
|
results |
|
reactants |
|
products |
During a chemical reaction molecules and atoms (reactants) are rearranged into new combinations that result in new kinds of atoms or molecules (products).
Poor balance could indicate an issue with which part of the nervous system?
cerebellum |
|
cerebrum |
|
spinal cord |
|
medulla |
The cerebellum is a large cluster of nerves at the base of the brain that's responsible for balance, movement, and muscle coordination.
I biome is made up of naturally occurring flora and fauna. Fauna is which of the following?
habitats |
|
plants |
|
animals |
|
minerals |
A biome is a large naturally occurring community of flora (plants) and fauna (animals) occupying a major habitat (home or environment).
In which type of compound are electrons shared between atoms?
chemical |
|
ionic |
|
molecular |
|
covalent |
A compound is a substance containing two or more different chemical elements bound together by a chemical bond. In covalent compounds, electrons are shared between atoms. In ionic compounds, one atom borrows an electron from another atom resulting in two ions (electrically charged atoms) of opposite polarities that then become bonded electrostatically.
Which of the following substances gives up positively charged hydrogen ions (H+) when dissolved in water?
base |
|
alkaline |
|
acid |
|
solution |
An acid is a substance that gives up positively charged hydrogen ions (H+) when dissolved in water. A base (alkaline) gives up negatively charged hydroxide ions (OH-) when dissolved in water. pH is a scale that measures of how basic or acidic a solution is. Numbered from 0 to 14, solutions with a pH of 7 are neutral, less than 7 are acidic, more than 7 are alkaline.