| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.29 |
| Score | 0% | 66% |
In the heart, the __________ artery and vein manage blood flow to the lungs.
atrial |
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aorta |
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pulmonary |
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capillary |
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.
I biome is made up of naturally occurring flora and fauna. Fauna is which of the following?
minerals |
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animals |
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plants |
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habitats |
A biome is a large naturally occurring community of flora (plants) and fauna (animals) occupying a major habitat (home or environment).
The heat from the Sun traveling to Earth is an example of which of the following?
convection |
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radiation |
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conduction |
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electricity |
Radiation occurs when electromagnetic waves transmit heat. An example is the heat from the Sun as it travels to Earth.
Earth's troposphere layer is which of the following?
closest to the surface |
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farthest from the surface |
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coldest |
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hottest |
The Earth's atmosphere has several layers starting with the troposphere which is closest in proximity to the surface. Containing most of the Earth's breathable air (oxygen and nitrogen), it's a region with warmer temperatures closer to the surface and cooler temperatures farther away which results in the rising and falling air that generates weather.
Which of the following substances gives up negatively charged hydroxide ions (OH-) when dissolved in water?
acid |
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ion |
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base |
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hydrogen |
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.