| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.63 |
| Score | 0% | 73% |
__________ is caused by a lack of iron in the diet.
anemia |
|
scurvy |
|
diabetes |
|
shingles |
Anemia, which may cause weakness, dizziness, and headaches is caused by a lack of iron in the diet.
The number system most used in science is the:
British system |
|
American system |
|
metric system |
|
English system |
The metric system is a number system that designates one base unit for each type of measurement. For example, the base unit for length is the meter and the base unit for mass is the gram.
Which of the following substances gives up negatively charged hydroxide ions (OH-) when dissolved in water?
ion |
|
acid |
|
hydrogen |
|
base |
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.
Which of the following is the correct order for types of radiation from lowest to highest frequency?
visible light → ultraviolet light → radio waves |
|
microwaves → radio waves → visible light |
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radio waves → visible light → gamma rays |
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infrared waves → microwaves → ultraviolet light |
The electromagnetic spectrum covers all possible wavelengths and frequencies of radiation. From lowest frequency (longest wavelength) to highest frequency (shortest wavelength) radiation: radio waves → microwaves → infrared waves → visible light → ultraviolet light → X-rays → gamma rays.
Food is mixed with gastric acid and pepsin in the __________ to help break down protein.
mouth |
|
small intestine |
|
large intestine |
|
stomach |
Food is mixed with gastric acid and pepsin in the stomach to help break down protein.