its d . electron because it has a negative charge of however many there are that are circling the atom
Answer:
The cell membrane, or in plant cells, the cell wall
Explanation:
In a plant cell the cell wall helps maintain structure, and in animal cells, the cell membrane regulates what goes in and out of the cell and acts as a structure
9) Richter scale
10)Seismograph
11) measurement of the amplitude of the largest wave
I do believe to are correct
The erosion or disintegration of rocks, building materials, etc., caused by chemical reactions (chiefly with water and substances dissolved in it) rather than by mechanical processes
Certain fossils, called index fossils, help geologists match rock layers. To be useful as an index fossil, a fossil must be widely distributed and represent a type of organism that existed for a brief time period. Index fossils are useful because they tell the relative ages of the rock layers in which they occur.
