| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.33 |
| Score | 0% | 67% |
In the heart, blood flows from the __________ ventricle to the lungs then back to the heart via the __________ atrium.
left, right |
|
right, right |
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left, left |
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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.
The Earth's rocks fall into three categories based on how they're formed. Which of the following is formed by the gradual depositing of small rocks?
granite |
|
metamorphic |
|
sedimentary |
|
igneous |
The Earth's rocks fall into three categories based on how they're formed. Igneous rock (granite, basalt, obsidian) is formed from the hardening of molten rock (lava), sedimentary rock (shale, sandstone, coal) is formed by the gradual despositing and cementing of rock and other debris, and metamorphic rock (marble, slate, quartzite) which is formed when existing rock is altered though pressure, temperature, or chemical processes.
What part of the food chain serves only as food for other organisms?
primary consumers |
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secondary consumers |
|
decomposers |
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producers |
Producers (autotrophs) serve as a food source for other organisms. Typical producers are plants that can make their own food through photosynthesis and certain bacteria that are capable of converting inorganic substances into food through chemosynthesis
In the metric system, what prefix represents 103?
mega |
|
centi |
|
milli |
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kilo |
Kilo is the metric system prefix for 103.
__________ and __________ pair to strengthen bones.
calcium, vitamin A |
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vitamin D, magnesium |
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vitamin D, calcium |
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iron, calcium |
Vitamin D helps calcium strengthen bones while also aiding muscle, nerve, and immune system function.