Science Curiosity and Exploration

Color television works by using three primary colors of light: red, green, and blue. These colors combine in various ways to create the full spectrum of colors seen on the screen.

A solar battery is a device that stores energy from sunlight for later use. It converts solar energy into electrical energy through photovoltaic cells.

A fuel cell is a device that converts chemical energy from fuels, typically hydrogen, directly into electricity through an electrochemical reaction. This process produces water and heat as byproducts.

<p>A transistor works by using a small input current to control a larger output current, acting as a switch or amplifier. This allows it to manage electrical signals in devices.</p> Signup and view all the answers

<p>Key challenges include ensuring life support systems for survival, spacecraft propulsion for long distances, and safe re-entry to Earth. Each destination presents unique environmental hazards.</p> Signup and view all the answers

<p>The existence of intelligent life elsewhere in the universe remains unproven, but many scientists believe the vast number of exoplanets increases the likelihood of finding it.</p> Signup and view all the answers

<p>Scientists contribute by asking questions, conducting experiments, and building upon previous discoveries to create new technologies and innovations. Collaboration and iteration are key to this process.</p> Signup and view all the answers

<p>Curiosity drives scientists to ask questions about the world and seek answers through investigation and experimentation. It is a fundamental trait that fosters innovation.</p> Signup and view all the answers

<p>Limited means of communication, such as the absence of telephones and reliable postal services, greatly hindered scientific progress.</p> Signup and view all the answers

<p>Inventors had little access to previous discoveries due to the rarity and expense of books, leading them to rediscover principles independently.</p> Signup and view all the answers

<p>Alexander Graham Bell could invent the telephone because he built on principles of electricity and sound that were previously discovered and documented by others.</p> Signup and view all the answers

<p>Inventions like the telephone emerged from contributions by inventors of various nationalities who collectively provided foundational discoveries.</p> Signup and view all the answers

<p>Traveling to share discoveries was dangerous and time-consuming due to a lack of automobiles, trains, and adequate roads.</p> Signup and view all the answers

<p>No, modern inventions cannot be solely attributed to individuals because they rely on the cumulative discoveries of many scientists over time.</p> Signup and view all the answers

<p>Advancements in understanding electricity, magnetism, and electric resistance enabled inventors like Bell to utilize existing knowledge in creating new inventions.</p> Signup and view all the answers

<p>People often mistakenly believe that inventors like Watt and Edison worked entirely alone, overlooking the contributions of earlier scientists.</p> Signup and view all the answers