| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.73 |
| Score | 0% | 75% |
This skeletal system is common in arthropods like insects, spiders, and crustaceans.
vertebrate |
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bone |
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exoskeleton |
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endoskeleton |
An exoskeleton (external skeleton) is common in arthropods like insects, spiders, and crustaceans.
Which of these layers is found directly below the Earth's crust?
mantle |
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continents |
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outer core |
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inner core |
The crust is the Earth's outermost layer and is divided into oceanic and continental types. Oceanic crust is 3 miles (5 km) to 6 miles (10 km) thick and is composed primarily of denser rock. Continental crust is 20 to 30 miles (30 to 50 km) thick and composed primarily of less dense rock. The crust makes up approximately one percent of the Earth's total volume.
Which of these is matter than cannot be separated into different types of matter by ordinary chemical methods?
element |
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compound |
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molecule |
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atom |
An element is matter than cannot be separated into different types of matter by ordinary chemical methods.
Carbohydrates are found in:
sugars and starches |
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vegetable oils |
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food additives |
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animal sources |
Carbohydrates are major sources of energy for the body and are found in sugars (fruit, cane sugar, beets) and starches (bread, rice, potatoes, pasta).
Which of the following is not a terrestrial planet?
Jupiter |
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Earth |
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Mercury |
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Venus |
The four planets closest to the Sun (Mercury, Venus, Earth, and Mars) are called terrestrial (Earth-like) planets because, like the Earth, they're solid with inner metal cores covered by rocky surfaces.