| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 2.99 |
| Score | 0% | 60% |
Which of these is matter than cannot be separated into different types of matter by ordinary chemical methods?
molecule |
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element |
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compound |
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atom |
An element is matter than cannot be separated into different types of matter by ordinary chemical methods.
In the water cycle, infiltration is most closely related to:
water table |
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oceans |
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runoff |
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rivers |
The water then accumulates as runoff and eventually returns to bodies of water or is absorbed into the Earth (infiltration) and becomes part of the water table, an underground resevoir of fresh water.
Which of the following is not one of the outer planets?
Venus |
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Jupiter |
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Uranus |
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Neptune |
In contrast to the solid terrestrial planets, the outer planets (Jupiter, Saturn, Uranus, and Neptune) consist of hydrogen and helium gas and water.
Which of these layers is found directly below the Earth's crust?
outer core |
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mantle |
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continents |
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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.
pH is a scale that measures of how basic or acidic a solution is. A solution with a pH of 9 is:
neutral |
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alkaline |
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water |
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acidic |
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.