Lab Report Electrical Conductivity Essay Example

Lab Report Electrical Conductivity Paper When an ionic compound forms, the anion transfers an electron to the action which creates an electrostatic bond and an electrically neutral compound. Also, they readily solve in aqueous solutions and are good conductors of heat and electricity. Further, ionic compounds can be classified as either strong conductors or weak conductors. In contrast, molecular compounds are formed from non-metals. Molecular compounds share electrons between atoms forming a covalent bond. In general, molecular compounds do not dissolve readily in solution and are poor conductors of heat and electricity. They are classified as Nan-electrolyte compounds. The reason of why electrolytes or ionic compounds are supposed to conduct electricity is because of the charge of the molecule, ionic compounds can have either a really positive or a really negative charge. This charge in the molecule makes it easier to electrons to move from molecule to molecule; therefore an electric current is generated. On the other hand, covalent compounds, either polar or non-polar, are not capable of conducting electricity. This is because they have more balanced charges and it is harder for electrons to move from one particle to another one. Also one has to take into account that when dealing with mixtures, if it contains one ionic compound and a covalent compound, its conductivity will be affected by the covalent compound and it probably wont ransoms an electric current. In this experiment, six different substances will be used in order to determine their electrical conductivity. We will write a custom essay sample on Lab Report Electrical Conductivity specifically for you for only $16.38 $13.9/page Order now We will write a custom essay sample on Lab Report Electrical Conductivity specifically for you FOR ONLY $16.38 $13.9/page Hire Writer We will write a custom essay sample on Lab Report Electrical Conductivity specifically for you FOR ONLY $16.38 $13.9/page Hire Writer Objectives To know, determine and prove which substances are capable to conduct electricity and which substances cant conduct electricity and if any of these six following substances can conduct electricity by submerging two copper wires connected to a battery that powers up a light bulb when electric current is present and the copper wire conduct it. Also being able to explain at the end the cause of why some substances were not capable to transmit an electric current while other substances could. Material IV battery 3 copper wires 1 small light bulb pup Physiological serum (Electrolytes) Storage Sucrose 1% Nasal KICK 5% 2 screws Method 1 . Connect the copper wires to the battery and the light bulb, (first wire) one end goes to the battery and the other end is left aside, (second wire) one end goes to the battery and the other goes to the light bulb, (third wire) one end goes to a metal part next to the light bulb and the other end is left aside.

Habits and Traits of Darkling Beetles

Habits and Traits of Darkling Beetles The family Tenebrionidae, the darkling beetles, is one of the largest beetle families. The family name comes from the Latin tenebrio, meaning one who loves darkness. People raise darkling beetle larvae, known as mealworms, as food for birds, reptiles, and other animals. Description Most darkling beetles look similar to ground beetles, black or brown and smooth. Theyre often found hiding under rocks or leaf litter and will come to light traps. Darkling beetles are primarily scavengers. The larvae are sometimes called false wireworms because they look like click beetle larvae (which are known as wireworms). Though the Tenebrionidae family is quite large, numbering close to 15,000 species, all darkling beetles share certain characteristics. They have 5 visible abdominal sternites, the first of which is not divided by coxae (as in the ground beetles). The antennae usually have 11 segments and may be filiform  or moniliform. Their eyes are notched. The tarsal formula is 5-5-4. Classification Kingdom: AnimaliaPhylum: ArthropodaClass: InsectaOrder: ColeopteraFamily: Tenebrionidae Diet Most darkling beetles (adults and larvae) scavenge on plant matter of some kind, including stored grains and flour. Some species feed on fungi, dead insects, or even dung. Life Cycle Like all beetles, darkling beetles undergo complete metamorphosis with four stages of development: egg, larva, pupa, and adult. Female darkling beetles deposit their eggs in the soil. Larvae are worm-like, with slender, elongated bodies. Pupation usually occurs in the soil. Special Adaptations and Defenses When disturbed, many darkling beetles will emit a foul-smelling liquid to dissuade predators from dining on them. Members of the genus Eleodes engage in a somewhat bizarre defensive behavior when threatened. Eleodes beetles raise their abdomens high in the air, so they almost appear to be standing on their heads, while fleeing the suspected danger. Range and Distribution Darkling beetles live worldwide, in both temperate and tropical habitats. The family Tenebrionidae is one of the largest in the beetle order, with well over 15,000 species known. In North America, darkling beetles are most diverse and abundant in the west. Scientists have described 1,300 western species, but only around 225 eastern Tenebrionids. Sources Family Tenebrionidae - Darkling Beetles - BugGuide.NetDarkling Beetle, St. Louis ZooDarkling Beetle Fact Sheet, Woodland Park ZooBorror and Delongs Introduction to the Study of Insects, 7th Edition, by Charles A. Triplehorn and Norman F. Johnson