Read the article "Past and Present Ships:" The ship has been used to travel across waterways for thousands of years. The methods, tools, and purposes of ships have changed greatly from the age of exploration to the present.

When explorers sailed to the new world, ships were built with multiple masts and many sails. Wind caught the sails and sped the boat along. In order to harness more of the wind's energy, ship builders increased the size ofirection. Instead of masts and sails, these ships have stacks of funnels that release steam and smoke from the engines.

Another area of difference between past and present ships is the tools that are used. Explorers could only use maps of areas that had been previously explored. In order to sail to new lands, nav by measuring the angle between the sun and the horizon. Other tools included the cross r ships or objects in the water.
ses of ships have changed over time. Early explorers used seaworthy ships to discover new lands. In contrast, people who want to explore other countries can take cruises. In the past, ships transported people and goods from one place to another, especially for trade. Colonies would se. Common items included fish, furs, lumber, cotton, and sugar. een nations. Bulk containers move raw materials, while tankers ship oil and petroleum to different countries. The ship's purposes are the same, but the ways in which they accomplish their goals are different.

For centuries, ships have brought news of discoveries to the world. The differences between past and present t people and change the world.

Read the article "The Impact of Boating:"

Many people enjoy boating on rivers, lakes, and oceans. The sun feels waen used for these types of activities. Unfortunately, the boating has serious consequences for the environment.

Boat engines usually run on oil or fuel. These fluids have the potential to spill or leak into the water. Once in the water, oil and fuel tend to stay on the surface of the water. These harmful liquids poison fish, birds, and other wildlife. They also diminish water clarity. When the United States realized the severe impact of oil and fuel on waterways, there were laws passed, making it illegal to put oil or fuel in U. S. waters. People work together to clean up any oil or fuel spills and take care of any affected animals.

Another way that waterways are polluted is when people throw garbage overboard. Containers, plastic bags, and fishing line are examples of some of the trash floating in waters around the U. S. Animals can eat the plastic or become entangled in the trash. Much of the trash is the kind that does not decompose, so its presence will be felt for hundreds of years. When people are aware of this issue, they stop throwing trash overboard and help to clean their beaches.

Many people enjoy traveling to different bodies of water in order to swim, fish, or simply boat. When boats leave one waterway, some of the animals and plants may be present on or in the boat. These animals and plants are then put into a new environment, where they spread. If these species are not native to the new area, they are called invasive species. The impact of the newly introduced species can be devastating, as they can endanger other plants and animals. For example, the European water chestnut was first discovered in North American waters in 1800. Since then, its large leaves have reduced sunlight and oxygen levels in fresh water areas. Other floating plants are not able to grow. As a result, some boaters have begun drying their boats before moving from one body of water to another.

Boating is a fun, enjoyable activity, with a lot of responsibility. Boaters need to take care of their boats in order to reduce their impact on the environment.

How is the structure of "Past and Present Ships" different from the structure of "The Impact of Boating?"

"Past and Present Ships" uses a cause and effect text structure to show the impact of ships on the world, while "The Impact of Boating" uses a chronological order text structure to show the laws put into place to protect the environment.

"Past and Present Ships" uses a chronological text structure to show the development of navigation tools over hundreds of years, while "The Impact of Boating" uses a problem and solution text structure to show the laws created by the government to make boating better for the environment.

"Past and Present Ships" uses a compare and contrast text structure to show the similarities and differences between ships used by early explorers and those used now, while "The Impact of Boating" uses a cause and effect text structure to show the damage boating does to the environment.

"Past and Present Ships" uses a problem and solution text structure to show how problems faced by ships were solved, while "The Impact of Boating" uses a compare and contrast text structure to show healthy and unhealthy waterways.