Nematode lab
Flame Test Lab
1)The salts need time to absorb the energy from the flame before they can emit light, causing them to take a few seconds to ignite.
2)Ionic bonds are usually formed between a metal and a nonmetal.
3)In chemistry, a salt is defined by any any chemical compound formed by the reaction between a base and an acid, with all or part of the Hydrogen in the acid replaced by a metal or other cation.
4)Fire is an exothermic chemical reaction resulting in rapid oxidization and an emission of light
5)The chemicals involved in the lighting of a match are red phosphorus, sulfur, and potassium chlorate. When the match head is rubbed against the striking surface, the friction causes a small amount of the red phosphorus to convert to white phosphorus, which ignites in the air at room temperature. The sulfur and potassium chlorate act as fuel and oxidizers for the flame.
6)A chemical reaction is a reaction involving the change of a substance to a new one with different chemical properties.
7)Wildfires affect the water, nitrogen, and carbon cycles on Earth.
8)Wildfires in San Diego have affected the environment by causing the watershed to become less permeable, leading to more runoff, which causes increased soil erosion and landslides. In addition, much of the habitat for native animals and birds was burned, leading to a lower population and less land for them to nest. Another impact that the fires have had was (obviously) that many plants were burned, releasing much carbon into the atmosphere, and lowering the amount of food available to some plant-eating animals.
2)Ionic bonds are usually formed between a metal and a nonmetal.
3)In chemistry, a salt is defined by any any chemical compound formed by the reaction between a base and an acid, with all or part of the Hydrogen in the acid replaced by a metal or other cation.
4)Fire is an exothermic chemical reaction resulting in rapid oxidization and an emission of light
5)The chemicals involved in the lighting of a match are red phosphorus, sulfur, and potassium chlorate. When the match head is rubbed against the striking surface, the friction causes a small amount of the red phosphorus to convert to white phosphorus, which ignites in the air at room temperature. The sulfur and potassium chlorate act as fuel and oxidizers for the flame.
6)A chemical reaction is a reaction involving the change of a substance to a new one with different chemical properties.
7)Wildfires affect the water, nitrogen, and carbon cycles on Earth.
8)Wildfires in San Diego have affected the environment by causing the watershed to become less permeable, leading to more runoff, which causes increased soil erosion and landslides. In addition, much of the habitat for native animals and birds was burned, leading to a lower population and less land for them to nest. Another impact that the fires have had was (obviously) that many plants were burned, releasing much carbon into the atmosphere, and lowering the amount of food available to some plant-eating animals.
Measurement
Save Fred!
Dominic Dudley, Tyler Gange
August 25, 2014
Purpose:
In this lab, our purpose was to take measurements of a gummy worm, peach ring, and a plastic cup. Afterwards, we were to use bent paperclips to maneuver the worm into the peach ring.
Procedure:
First, we tried to hook the worm in the middle, and lower it into the peach ring, however, it wouldn't fit easily so we used two hooks to stretch the opening in the ring. This succeeded. Afterwards we took measurements on the length and weight of the worm, diameter of the peach ring, and volume of the cup.
Pre-lab questions
1) Following an agreed upon procedure allows you to know what you're doing before you start.
2) Documenting your procedure is essential to labs so that you have all data documented.
3) We do not normally have food in chemistry class because there is a chance that it could get contaminated by harmful chemicals.
Data
Fred: Weight: 7.6 Grams---Length: 8.5 cm
Life Preserver: Weight: 7,500 mg---Diameter: 35 mm
Boat: Volume: 266 ml---Circumference: 27.3cm
August 25, 2014
Purpose:
In this lab, our purpose was to take measurements of a gummy worm, peach ring, and a plastic cup. Afterwards, we were to use bent paperclips to maneuver the worm into the peach ring.
Procedure:
First, we tried to hook the worm in the middle, and lower it into the peach ring, however, it wouldn't fit easily so we used two hooks to stretch the opening in the ring. This succeeded. Afterwards we took measurements on the length and weight of the worm, diameter of the peach ring, and volume of the cup.
Pre-lab questions
1) Following an agreed upon procedure allows you to know what you're doing before you start.
2) Documenting your procedure is essential to labs so that you have all data documented.
3) We do not normally have food in chemistry class because there is a chance that it could get contaminated by harmful chemicals.
Data
Fred: Weight: 7.6 Grams---Length: 8.5 cm
Life Preserver: Weight: 7,500 mg---Diameter: 35 mm
Boat: Volume: 266 ml---Circumference: 27.3cm