Sustainable Ecosystems
What are the three ways to reduce carbon dioxide in the Atomsphere? (K/U)
Kyoto Protocol
Protecting existing forests
Recycling programs
State each compound as an Ionic or Molecular (K/U)
1) Hâ‚‚SOâ‚„
2) FeCl2
3) HClO4
1) Molecular compound
2) Ionic compound
3) Molecular compound
Define the following terms:
Luminosity
Absolute magnitude
(K/U)
Luminosity: The luminosity of the star refers to the overall amount of energy emitted by the star.
Absolute magnitude: It describes how bright a star actually is, without distance involved
Describe the difference between a primary and secondary cell (K/U)
A Primary cell is a cell that can only be used ones then it would be discarded
A Secondary cell is a cell that can be used or recharged again.
How have the humans decreased biodiversity in aquatic and terrestrial ecosystems? (T/I)
Human activities such as Deforestation, Draining wetlands, Overexploitation, caused the biodiversity in aquatic and terrestrial ecosystems to decrease.
For example: Deforestation was occurred in the Brazilian rainforest and a total of 11,088 sq km (4,281 sq miles) of the rainforest were destroyed from August 2019 to July 2020.
If an atom has 15 electrons how many energy levels are occupied? (T/I)
There are three energy levels occupied because there are two electrons in the first level and 8 in the second level and 5 in the third level
What do you think 🤔 the invention of the calender lead to? (T/I)
The calender led to the first civilization in many ways. It led the people to predict yearly events, for example the 4 seasons. It led to agriculture which led to extra food which led to people who spelized in diverse area, that helped them figure out the locations of herds of animals and etc.
Use Ohm’s Law to help you find the missing numbers for the following circuits.(T/I)
Circuit Resistance (Ω) Voltage (V) Current (A)
#1 27 1.5
#2 45 3.75
#3 120 240
1) 18 Ω
2) 168.75 V
3) 2 A
New brunswick is deciding wether they should close the Atlantic Environmental Science Centre, which maintains a laboratory database and research of the of the diturbution and status of New Brunswick biodiversity. As a conservationist you should take a stand against this action. Provide three reasons why the center should not be closed. (C)
1) The laboratory should not be closed because it should keep track of the biodiversity, since it functions the environment with oxygen, water, pesticides and etc.
2) Without monitoring the biodiversity and surveillancing it, the Atlantic rivers and lakes, it might cause some problems to the water we drink since our fresh water is from there
3) The Laboratory provides analysis of metals, pesticides, polycyclic aromatic hydrocarbons, and oil matching/identification for environmental research and monitoring
Write a statment about why we should use the WHIMS while experimenting a demostartion in the laboratory .
The Workplace Hazardous Materials Information System (WHMIS) provides many and important information about the hazardous products that you may use while experimenting chemical practices together
Why does it seem like comets have large tails that flow away from the Sun? (C)
Since Comets have two tails, one of its tails is dusty that allows it to flow directly behind the comet in the direction from which the comet is orginated. The other tail which is called the gas tail is caused by the sublimation of the comets surface into both gases and dust, and this tail is blown by the solar wind and points directly away from the sun.
An animal is rubbing against a student’s rubber shoes. Then the shoes touches the neutral pith ball of the electroscope. A piece of ebonite is brought to the pith ball electroscope, and the pith ball is found to be repelled. What do you infer about the form of ebonite charge? Explain your reasoning.(C)
To begin with, rub a bit of vinyl against a bit of glass, so the vinyl turns out to be negatively charged and the glass turns out to be positively charged. Then, rub another bit of glass with any fur. Test to see if that piece of glass is attracted to the positively charged glass and repelled by the negatively charged vinyl; if so, then the fur is above vinyl and below glass. Finally, rub a third piece of glass with hard rubber. Test to see if that piece of glass is attracted to the positively charged glass; if so, then hard rubber is above vinyl as well.
In Muskoka there are lots of cottages. Each cottage is beside a lake or a sea 🌊 , many of the fertilizer where dropped in the lake or the sea. Where does the fertilizer go and what will happen to the fishes if they absorbed the fertilizer in the water? (A)
Fertilizer runoff from the lawns of the cottages, which could cause algae to grow, which would make the water cloudy. If there are too much algae it could also reduce oxygen levels and kill fish.
Zinc has a density of 7.13 g/cm² . Faux Zinc is a fake zinc that is mostly fooled by lots of people; because of its weight. Its volume is 3.65 cm³. What is the total mas of the both zinc?
The total mass of the zincs are 26.0245 g
M=V*D
7.13 x 3.65= 26.0245 g
If the Moon does not generate its own light, how can it be seen by us? While explaining use the word "luminous" to justify your answer.(A)
The word luminous is used while applying to an object that emits energy and light. All the stars are luminous, for instance, which is why we are able to see them in the night sky fairly quickly. A non-luminous celestial object cannot produce its own energy or light on its own.
List two any applications of electrostatics.(A)
Laser printer and Photocopier Printer