Ineed like right now with these question they are true or false 1. the surface area of the earth is mainly dry land. true false 2. the air is composed mainly of oxygen. true false 3. people have walked on the moon but not on mars. true false 4. a very small percent of the world's population produces the majority of the world's food. true false 5. ddt is an ideal pesticide. true false 6. today's world population remains fairly constant since some countries experience growth, while others are declining. true false 7. petroleum requires millions of years to form. true false 8. a nation's industrial growth is independent of its transportation system. true false 9. orbiting satellites use geothermal energy panels. true false 10. because of the weightless conditions of space flight, astronauts do not need to exercise during missions. true false 11. continental shelves are nearly thirty-five thousand feet deep. true false

2. False

The air is a gaseous mas that is composed of numerous different gasses. Some of the gasses that are present in the air are the nitrogen, oxygen, carbon dioxide, ozone, sulfur dioxide, water vapor etc. The oxygen though it is not the most common gas in the air. The most common gas in the air is actually the nitrogen, representing the majority of the gas composition of the air, and having higher percentage than all of the other gasses combined together.

3. True

There has been numerous space explorations in the past half a century, and multiple things have been discovered and there's constantly new things that are discovered. The people have always had passion about exploring the space and so they started doing so once they could. The people also want to go to space and visit and explore some of the space objects, such as the satellites and the planets. While the Moon has been visited once, and weirdly enough never again, the other space objects have not been visited by humans. Not even the closest planet to Earth, Mars, have been visited, though there are efforts made to make this possible very soon.

4. False

The percentage of people that are engaged in agriculture is not small at all, it is actually very large, and the estimates say that it is around 60% on a global scale. That actually puts the majority of the global population to be involved in producing food. This of course differs from nation to nation, and the easiest way to make an assumption about how much of the people in certain nation are involved in production of food, thus agriculture, we just need to see in which development category the nation is. The well developed countries have just 1 or 2%, the developing around 50%, and the less developed around 85% of the population engaged in agriculture.

5. False

DDT is a pesticide that has actually been banned. This pesticide has been very effective when it came to killing off the pests, but the big problem with it was that it was very unsafe for the animals and humans. The DDT manged to easily store into the fats of the fish, birds, and other animals. The humans often eat these animals, and the DDT is extremely toxic, and it can even result in death if an animal has stored more of it and has been consumed later on, thus it is far from the perfect pesticide.

6. False

The world population is not remaining constant nowadays, but it is actually still on the rise. Even though the more developed countries and partially the developing countries have much decreased birth rates, the other part of the developing countries, and especially the less developed countries have very high birth rates. The birth rates in these countries are so high that they still cause rise of the world's population. The growth is slower than before, and it is expected to constantly slow down, but for the time being there's still some growth going on.

8. False

The industrial growth of a nation depends on multiple factors, and one of the biggest ones is the transportation system. The transportation system is crucial for the development and growth of the industry. It is the factor that enables the materials to reach the industry, and it is the one that transports the final products to the market. The good transportation system manages to lower the costs and increases the speed of delivery in both ways, thus making it a vital component of the industrial growth.

9. False

The orbiting satellites do not use geothermal energy panels, with the sole reason that it is simply impossible. The satellites, once in the orbit, are using the Sun as their energy source, and for that purpose they use solar panels. The solar panels are made out of very small, numerous, solar cells that are made out of silicon. The silicon is a material that manages to harvest the solar energy, to turn it into electrical energy, and thus provide the satellites with energy so that they can function nonstop.

11. False

The continental shelves are the part of the oceans that is bordering the land masses. This part of the ocean is very shallow. It is also relatively flat and the angle of its fall is very small. The continental shelves tend to be deep between few cm at their edges and up to 100 meters which is taken as their limit. The continental shelf has the warmest waters of any part of the ocean. It is thriving with marine flora and fauna, as it is the part where the sunlight manages to penetrate through most of it. The humans also see it as the most attractive part of the ocean and use it for multiple different recreational activities.

answer; rarely listen to the child's point of view;

answer; ///was   constructed according to a mathematical formula;