| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.21 |
| Score | 0% | 64% |
The fossil record is a product of which period of Earth's history?
Cambrian |
|
Cretaceous |
|
Jurassic |
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Cenozoic |
The Cambrian period is one of the most significant geological time periods. Lasting about 53 million years, it marked a dramatic burst of changes in life on Earth known as the Cambrian Explosion. It is from this period that the majority of the history of life on Earth, as documented by fossils, is found. Called the fossil record, the layering of these mineralized imprints of organisms preserved in sedementary rock have allowed geologists to build a historical record of plant and animal life on Earth.
During digestion, after proteins are broken down where does the undigested food go next?
stomach |
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esophagus |
|
large intestine |
|
small intestine |
Food is mixed with gastric acid and pepsin in the stomach to help break down protein.
Which of the following is the smallest component of an element that still retains the properties of the element?
atom |
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neutron |
|
molecule |
|
element |
An atom is the smallest component of an element that still retains the properties of the element.
Which is the proper order of Earth's atmospheric layers from the surface up to space?
mesosphere, thermosphere, stratosphere, troposphere |
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troposphere, stratosphere, mesosphere, thermosphere |
|
stratosphere, troposphere, mesosphere, thermosphere |
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thermosphere, mesosphere, stratosphere, troposphere |
The troposphere is the closest layer to Earth, followed by the stratosphere, mesosphere, and finally the thermosphere which borders space.
Which of these vitamins doesn't come from food?
D |
|
Potassium |
|
A |
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C |
Vitamins are necessary for a wide variety of bodily processes. Some vitamins like Vitamins A and C come from diet but others, like Vitamin D, are generated in response to sunlight.