Chemistry
How many atoms are in this formula?
(CH2)6(CH3)2
26
Define Conductor. Give one example
A material or device that allows electrons to flow freely.
Examples; tap water, metal, aluminum, gold, copper
If a negatively charged object is charged by INDUCTION. What charge will the neutral pith ball end up with?
Positive.
List Earth's 4 spheres
Hydrosphere, lithosphere, atmosphere, biosphere
What is the difference between population and community?
Population- the number of one specific species
Community- All the species within a particular area
List the seven diatomic molecules
Hydrogen, Oxygen, Fluorine, Bromine, Iodine, Nitrogen, Chlorine
Plastic, rubber, distilled water and wood are examples of this.
What is an insulator?
How are voltmeters connected in circuits? How are ammeters connected in circuits?
V- in parallel
A- in series
Describe the difference between a food web and a food chain
Food chain- linear, shows what animal eats what
Food web- a series of food chains, showing various trophic levels and relationships in an ecosystem
An area of region drained by a river, or body of water
What is the difference between an atom and an ion?
Atom- neutral charge
Ion- atom with a charge (+ or -)
What does the electrostatic series chart represent?
It tells you whether a material has a strong or weak hold on electrons
(top= weaker hold, will give up electrons)
What are the 4 parts of a circuit?
energy source, load, control device, connecting device
What is the Gaia Hypothesis?
states that the 4 spheres work together, behaving like a living organism.
Give two examples of each.
Biotic factors in a pond
Abiotic factors in a pond.
B- seaweed, algae, bacteria, fish, frogs, plants
A- water, rock
Draw the Bohr-Rutherford for Fluorine. (Include all components!)
(check answer with your teacher)
Explain the concept of lightning (what happens in the sky, on the ground and what causes the lightning strike?)
negative charge in bottom of clouds are attracted to protons in ground (electrons move away from top of ground, essentially leaving surface of ground with a positive charge)
electrons in cloud are attracted to protons in ground and a lightning strike occurs.
Circuit 1: 3 light bulbs, a switch and a cell connected in series.
Circuit 2: 1 light bulb, a switch, and a cell connected in series.
In which circuit will the lights shine brighter?
Circuit 2
What are the 2 MAIN ways humans increase the amount of carbon dioxide in the atmosphere?
Burning of fossil fuels
Deforestation
Differentiate between primary and secondary succession
Primary- bare land/rock, no life before
ex; volcano
Secondary- disrupts ecosystem but doesn't necessarily kill off species
ex; forest fire
Draw the covalent bond between two atoms of chlorine.
(Show drawing to teacher)
Draw a diagram for a positive rod coming in CONTACT with a neutral pith ball
They will both end up with a positive charge
A lightbulb uses 100J of electrical energy and produces 35 J of light energy. Calculate the percent efficiency.
35%
Write the word equation for cellular respiration?
sugar (glucose) + oxygen--> carbon dioxide + water + energy
Rustic Crayfish are non-native species to Canada.
a.)What is the term used to define these species?
b.) What are 3 negative impacts they can have?
a.) Invasive species
b.) prey on native species eventually killing them off, competing for food with native species, bringing disease, taking habitat/space from native species, etc.