Metric.
Pro-tip:
If you can add mili- centi- deci- to the front...
its metric.
++++
Not sure that's much of a tip. The prefixes are simply divisions, but it is true that they are used normally only for metric units. However, the litre is indeed part of the metric system: it is the basic unit of fluid volume.
Fahrenheit is a customary unit
Use whatever is common in your country. In the long term, however, the entire world should switch to metric, for reasons of standardization, so if you happen to live in a country that uses non-metric units, you might try to push for metrification.
126.8 cups 1 liter = 4.22 cups 1 cup = 0.23 liter
There are 1000 milliliters in 1 liter. One milliliter is 0.001 liter.
Oh Dear!!!! your English grammar is at fault. The question should read ' Which metric unit is the mass of an orange?'. NB 'Witch' is a female sorceress 'Which' is the question. To answer the question, an orange would be weighed in grams.
Metric.
liter(metric) gallon(customary)
It is a customary unit.
A liter is a metric unit of volume equivalent to 1,000 milliliters, while a quart is an imperial and U.S. customary unit of volume. Specifically, one quart is approximately 0.946 liters. Therefore, a liter is slightly larger than a quart. In summary, a liter is part of the metric system, and a quart is part of the imperial and U.S. customary systems.
The opposing systems are imperial and metric, not customary. But, meters are metric.
The pound is NOT a metric unit.
It can be more or less. An once (customary) is bigger than a gram (metric) but a pound (customary) is smaller than a kilogram (metric).
It is customary.
Metric
Metric.
A "gran" is a German measurement, it is neither customary or metric. A "gram" is a metric unit.
It is a customary unit.