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Waterfalls form where there is a layer of hard rock on top of a layer of soft rock.
The soft rock is eroded more quickly and undercuts the hard rock creating a ledge. The o...
a type of wander waals force called hydrogen bonding due to the slightly positive hydrogens and slightly negative oxygen. this occurs because of the uneven attraction for electrons between the oxygen and ...
Crude oil is a mixture of different hydrocarbons, which all have different lengths and must be separated by length into different useful 'fractions'. Fractional distillation achieves this by using the fac...
In portuguese nouns have gender- masculine or feminine.
Most masculine verbs end with -o, -im, -om, and -um. Most feminine nouns end with -a, -ção, -dade or -gem.
Examples:
Masculine...
Both Imperfecto and Indefinitivo are past tenses.
Imperfecto is a tense used to describe states, emotions, circumstances, settings - it implies that the action has not been finite in the past. For ...
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