| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.39 |
| Score | 0% | 68% |
In the heart, blood flows from the __________ ventricle to the lungs then back to the heart via the __________ atrium.
left, left |
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left, right |
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right, right |
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right, left |
The two largest veins in the body, the venae cavae, pass blood to the right ventricle which pumps the blood to the lungs through the pulmonary artery. Blood picks up oxygen in the lungs and returns it to the left atrium via the pulmonary vein.
As part of digestion, the liver produces bile which breaks down:
protein |
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starches |
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fat |
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sugars |
The liver produces bile which emulsifies (separates) fat.
The energy posessed by a thrown baseball is an example of what kind of energy?
transitional |
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potential |
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gravitational |
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kinetic |
Kinetic energy is the energy posessed by a moving object. Potential energy is stored energy in a stationary object based on its location, position, shape, or state.
Which of the following is related to the Cambrian Explosion?
extinction of dinosaurs |
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fossil record |
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carbon dating |
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first civilizations |
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.
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 |
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molecule |
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element |
An atom is the smallest component of an element that still retains the properties of the element.