4. what evidence is there to suggest that tectonic plates move?

Between 3.5 and 3.2 billion years ago the Earth's interior began to run low on heat generating radioactive elements, the mantle cooled down and there were fewer hot magma plumes. Stable convection cells formed in the mantle and started driving plate movements, and subduction, and plate tectonics began to shape the Earth's surface.

1. Location of mountains and fossils

The ancient mountain ranges (many now eroded to their cores) and the location of rock types and fossils all match up. Earthquakes and Volcanoes, If we map the location of all the earthquakes recorded over time, almost all of them occur along what we recognize as plate boundaries.

2. The Earth’s magnetic = field flips every few hundred thousand years, and the stripes on the ocean floor show a record of those changes. By estimating when the flips occurred and pairing that with the distance the strips have moved from the spreading zone, scientists can estimate how fast the continents are moving.

3. Direct Measurement  = Modern technology gives us a range of ways to directly measure the movement of tectonic plates. These methods are based around the idea of measuring distance between two points on Earth by using some intermediary transmitter in space. For example, SLR (Satellite Laser Ranging) uses two lasers on Earth, each of which fires a laser to a satellite orbiting the planet.

to act quickly in times of danger to the united states

because you have to act quickly if you want to live/survive.

the industrial revolution pushed the world into modern industrialization. it changed the course of history profoundly. it caused rapid urbanization and pushed cities and countries into development. the industrial revolution began in great britain with a series with new inventions which led to the creation of machines and mass production.

this caused the country to gain wealth and money and become an international superpower. it improved transportation and manufacturing inside the country, pushed people to live in urban areas and britain to become the most powerful nation in the world for a while.