The (blank) of these common rocks grow large because of the (blank) rate of cooling.
Wow that's vague, crystals, slow or fractures, rapid ??? hmmm Variences, differential??nah
Pumice rocks greatly expand as they shoot out of the volcano.
The (Crystals)of these common rocks grow large because of the (slow) rate of cooling.
To find the missing words in the sentence, let's analyze the information given:
1. The sentence mentions that the rocks in question are common rocks.
2. These rocks grow large because of the mentioned rate of cooling.
Considering these points, we can deduce the following:
1. The missing word should describe a characteristic of common rocks that undergo a slow rate of cooling.
2. The missing word should describe the result of the slow rate of cooling on the rocks.
Given these deductions, we can fill in the blanks as follows:
"The (crystals) of these common rocks grow large because of the (slow) rate of cooling."
Therefore, the missing words are "crystals" and "slow."