| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.02 |
| Score | 0% | 60% |
Which of the following describes the Earth's outer core?
solid |
|
makes up most of the Earth's volume |
|
liquid |
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primarily solid |
The Earth's core is divided into the liquid outer core (1,430 miles or 2,300 km radius) and the solid inner core (745 miles or 1,200 km radius).
Arteries carry __________ blood at __________ pressure.
oxygenated, low |
|
deoxygenated, low |
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deoxygenated, high |
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oxygenated, high |
Veins carry blood back to the heart from the body. While arteries are thick-walled because they carry oxygenated blood at high pressure, veins are comparatively thin-walled as they carry low-pressure deoxygenated blood. Like the heart, veins contain valves to prevent blood backflow.
Tertiary consumers eat which of the following?
all of these |
|
producers |
|
primary and secondary consumers |
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decomposers |
Tertiary consumers eat primary consumers and secondary consumers and are typically carnivorous predators. Tertiary consumers may also be omnivores. Examples include wolves, sharks, and human beings.
In a eukaryotic cell, which organelles deal with proteins?
ribosomes |
|
endoplasmic reticulum |
|
all of these deal with proteins |
|
Golgi apparatus |
The nucleus of a eukaryotic cell contains the genetic material of the cell and is surrounded by cytoplasm which contains many organelles. Ribosomes produce proteins, endoplasmic reticulum helps synthesize proteins and fats, and Golgi apparatus prepares proteins for use.
Changes to an object's speed or direction of motion are caused by which of the following?
power |
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a force |
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work |
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kinetic energy |
Force is applied to change an object's speed or direction of motion.