Based on the information present in the given passage, you need to write a correct answer to the given question. A correct answer is one that correctly and completely answers the question. Do not write answers that address the question partially or incorrectly. The correct answer must be contained in the given paragraph.

Q: Paragraph- Sent 1: An atom is the very smallest particle that still the elements properties.
Sent 2: All the atoms of an element are alike.
Sent 3: They are also different from the atoms of all other elements.
Sent 4: For example, atoms of gold are always the same.
Sent 5: It does not matter if they are found in a gold nugget or a gold ring.
Sent 6: All gold atoms have the same structure and properties.
Sent 7: For example, all gold atoms contain 79 protons.
Sent 8: One of golds unique properties is that it is a great conductor of electricity.
Sent 9: Gold is a better conductor of electricity than copper.
Sent 10: Gold is more rare and expensive than copper.
Sent 11: Copper is used in house wiring.
Sent 12: Gold is far too expensive. 
Question: How could we describe the atoms of an element?.

A: They are the smallest particles of an element. All the atoms of an element are alike and are also different from the atoms of all other elements.
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Q: Paragraph- Sent 1: Electric charge is a physical property.
Sent 2: It occurs between particles or objects.
Sent 3: It causes them to attract or repel each other.
Sent 4: They do not even have to touch.
Sent 5: This is unlike the typical push or pull you may be familiar with.
Sent 6: All electric charge is based on the protons and electrons in atoms.
Sent 7: A proton has a positive electric charge.
Sent 8: An electron has a negative electric charge.
Sent 9: Forces on Charged Objects Most atoms are balanced electrically.
Sent 10: They have the same number of positive and negative charges.
Sent 11: Therefore, the number of protons equals the number of electrons.
Sent 12: Neutrons do not matter as they have no charge.
Sent 13: When an object loses some electrons, it becomes positively charged.
Sent 14: There are now more protons than electrons inside the atom.
Sent 15: The lost electrons may remain free.
Sent 16: Or, they may attach to another object.
Sent 17: The new object now has more electrons than protons.
Sent 18: It then becomes negatively charged. 
Question: Why does an object's charge become positive?.

A: When an object loses electrons.
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Q: Paragraph- Sent 1: Earthquakes seemed to outline a special feature of earth's crust.
Sent 2: Earthquakes let scientists know where the crust was moving.
Sent 3: This led to the discovery that the Earths crust was broken up into regions, or plates.
Sent 4: Earthquakes happen most often along these plate boundaries.
Sent 5: This was evidence that continents can move.
Sent 6: The movements of the plates are called plate tectonics.
Sent 7: The Earths crust is divided into plates.
Sent 8: There are about a dozen large plates and several small ones.
Sent 9: Each plate is named for the continent or ocean basin it contains.
Sent 10: Scientists know he plates are in motion.
Sent 11: They now know the direction and speed of this motion .
Sent 12: Plates dont move very fast.
Sent 13: They move only a few centimeters a year.
Sent 14: This is about the same rate fingernails grow.
Sent 15: So you might wonder, what could cause this motion?
Sent 16: What supplies the energy to cause this change?. 
Question: What led to the discovery that the Earths crust was broken up into regions, or plates?.

A:
Movement of earth's crust.
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