| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.06 |
| Score | 0% | 61% |
During digestion, after proteins are broken down where does the undigested food go next?
stomach |
|
small intestine |
|
large intestine |
|
esophagus |
Food is mixed with gastric acid and pepsin in the stomach to help break down protein.
Which of the following is not a terrestrial planet?
Mercury |
|
Venus |
|
Jupiter |
|
Earth |
The four planets closest to the Sun (Mercury, Venus, Earth, and Mars) are called terrestrial (Earth-like) planets because, like the Earth, they're solid with inner metal cores covered by rocky surfaces.
Which of the following substances gives up negatively charged hydroxide ions (OH-) when dissolved in water?
hydrogen |
|
base |
|
acid |
|
ion |
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.
Blood is created in:
the heart |
|
bone marrow |
|
red blood cells |
|
the liver |
Blood is created in bone marrow and is made up of cells suspended in liquid plasma. Red blood cells carry oxygen, white blood cells fight infection, and platelets are cell fragments that allow blood to clot.
Which of the following is the smallest component of an element that still retains the properties of the element?
molecule |
|
neutron |
|
atom |
|
element |
An atom is the smallest component of an element that still retains the properties of the element.