Environmental Issues Chapter 2 Quiz

Any undesirable change in the physical, chemical, and biological characteristics of the environment.

Substances that bring about undesirable changes in the environment.

Human activities releasing various substances into the environment.

<p>Through their interdependence and mutual influence.</p> Signup and view all the answers

<p>They affect the environment and living organisms.</p> Signup and view all the answers

<p>It will significantly influence the biosphere, affecting all organisms.</p> Signup and view all the answers

<p>Silicon is a chemical element with symbol Si and atomic number 14. It is a hard and brittle crystalline solid with a blue-grey metallic lustre.</p> Signup and view all the answers

<p>Amorphous silicon is extracted by melting silicon with iron and copper in a furnace, while crystalline silicon is extracted from quartz by Berzelius.</p> Signup and view all the answers

<p>Amorphous silicon is non-crystalline, lacks long-range order, and is used in thin-film solar cells. Crystalline silicon has a regular crystal structure and is used in traditional solar panels.</p> Signup and view all the answers

<p>Silicon and silicon compounds are used in building materials, ornamental stones, and as components in solar panels and electronics.</p> Signup and view all the answers

<p>The Latin word 'Silicium' means stone or flint.</p> Signup and view all the answers

<p>Berzelius was the first chemist to introduce the representation of elements in terms of letters.</p> Signup and view all the answers

<p>Animal hair and dander, molds and bacteria, mold carpets and upholstery, pets, dust mites, pollen, tobacco, food, pesticides, fumes from chemicals, chemicals, smoke</p> Signup and view all the answers

<p>Industries should be established away from towns and cities, emissions from industries should be checked and controlled, regulatory rules should be strictly enforced, automobiles should be periodically checked, use of unleaded fuel and biofuels should be encouraged, public should be educated to use public transport</p> Signup and view all the answers

<p>Effluents from industries, sewage accumulation, extensive use of pesticides and fertilizers in agriculture</p> Signup and view all the answers

<p>Released into nearby sources of water, especially rivers</p> Signup and view all the answers

<p>Organic waste resulting from human activities</p> Signup and view all the answers

<p>Periodically checking the vehicles to improve engine efficiency</p> Signup and view all the answers

<p>Due to the properties of 'f' block elements that don't fit into the main table.</p> Signup and view all the answers

<p>Because the effective nuclear charge increases, pulling the electrons closer to the nucleus.</p> Signup and view all the answers

<p>Hydrogen and helium have different properties and don't follow the trend of increasing atomic number.</p> Signup and view all the answers

<p>Nonmetals are mostly found on the right side of the periodic table.</p> Signup and view all the answers

<p>Transitional elements are those found in the d-block of the periodic table.</p> Signup and view all the answers

<p>Metalloids are elements that have properties of both metals and nonmetals. An example is silicon (Si).</p> Signup and view all the answers

<p>Sporophyte and Gametophyte</p> Signup and view all the answers

<p>Haploid gametophyte</p> Signup and view all the answers

<p>Touch the ground, develop roots</p> Signup and view all the answers

<p>For their ornamental value</p> Signup and view all the answers

<p>Naked seeded plants, because their seeds are not enclosed in fruits</p> Signup and view all the answers

<p>Evergreen trees and some bushy plants</p> Signup and view all the answers