Question 33 saved

volcanic rock has often been found early in the rock record but less frequently in later rock layers. what does this suggest to scientists about early earth?

question 33 options:

1)

volcanic activity is the same today as it was early in earth's history.

2)

volcanic rock is more easily preserved than other kinds of rock.

3)

volcanic activity was more common in the past than it is today.

4)

volcanic rock is easier to find.

The third option

Explanation:

If people have found more volcanic rock layers in the past that would mean that volcanic activity was more common in the past.

the answer is b. dilution

nacl or sodium chloride is an ionic compound. this is because an ionic compound pertains to a compound that consists of positively and negatively charged ions. in this case, na (sodium) has a tendency to lose one electron when it reacts with with other atoms, so the resulting sodium ion contains 11 protons and 10 electrons, thus making it positively charged (na+), when chlorine reacts, it usually gains one electron to form an ion called chloride, thus making it negatively charged ( since the ions are oppositely charged, they attract.