The Precambrian interval of earth history is difficult to study because of its tremendous age. Many of the original rocks have been destroyed by weathering and erosion, or have been greatly altered by heat & pressure during burial, a process known as metamorphism.
The Precambrian time period is segmented into very few parts because it covers an extensive timespan (about 4 billion years) and lacks well-defined boundaries based on significant geological or biological events. The limited knowledge of Earth's early history and the scarcity of preserved rock formations from that time contribute to the challenge of subdividing the Precambrian into more distinct units.
Cenozoic Era
Oh yes, there are lots of smaller measurements than a millimeter. A micrometer is a thousand times smaller than a millimeter. There are also even smaller units such as the nanometer and the picometer, and the Angstrom.
To determine the number of formula units in 2.45 moles of potassium chloride, you first need to find the molar mass of KCl, which is approximately 74.55 g/mol. Then, divide the number of moles by the molar mass to get the number of formula units. Therefore, 2.45 moles of KCl is equivalent to about 163 formula units.
For this you need the atomic (molecular) mass of NaCl. Take the number of grams and divide it by the atomic mass. Multiply by one mole for units to cancel. NaCl=58.5 grams38.0 grams NaCl / (58.5 grams) = .650 moles NaCl
You must divide.
Because the number of larger units will be less than the number of smaller units, and when you divide the answer is usually smaller than the number you started with.
That depends on what you are converting from. If you are converting from larger units, you multiply. If you are converting from smaller units, you divide.
divide by the conversion factor. eg mm to m - divide by 1000 eg in to ft - divide by 12
If the question refers to converting from a smaller unit such as inch or centimetre to a larger unit such as foot or metre, the answer is Yes, you divide the number - in these examples by 12 or 100 respectively.
False. Scientists divide the time between Precambrian time and the present into three major eras: the Paleozoic, Mesozoic, and Cenozoic eras. The Precambrian itself is a vast time period that precedes these eras and is often subdivided into eons.
Societies divide their members into smaller units because people work most effectively with each other in small groups, not in huge masses.
No, never.
You have to multiply by the conversation ratio.
To change from a smaller unit to a larger unit, you have to divide. For example, 100 centimetres is equal to 1 metre.
eras.
If the units are the same, that will be the one with the smaller number of units.