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Definitons
Ecology
Chemistry
Electricity
Calculations
100
-Positively charged particles -Uncharged particles -Negatively charged particles
What are protons, neutrons, and electrons?
100
Name the three types of energy and their definitions
Radiant Energy-energy that travels through empty spaces from the sun Thermal Energy-the form of energy transferred during hearing or cooling Chemical Energy-the form of energy needed by organisms to perform functions
100
Explain the difference between physical and chemical changes
Physical- changes in form or state, involve only one substance, do not produce a new substance Chemical- involve more than one substance, always produces a new substance
100
What are the three ways in which objects become electrically charged?
-Friction -Contact (conduction) -Induction
100
Using the following information, calculate the growth rate for a population of 16 wolves living on an island Growth rate = births-deaths+immigration-emigration/initial population # X 100 Births: 7 Deaths: 4 Immigration: 2 Emigration: 1
25%
200
A pure substance composed of two or more different elements that are chemically joined
What is a compound?
200
Explain the difference between a community and an ecosystem
Ecosystem-consists of many organisms living together in the same abiotic environment Community-all of the living things in an ecosystem
200
How do you figure out the number of protons? Electrons? Neutrons?
Protons = atomic number Electrons = # of protons = atomic number Neutrons = mass number - atomic number
200
What is Hydro-Electric energy?
The energy of falling water
200
A block of aluminum occupies a volume of 15.0 mL and weights 40.5g. What is its density?
2.7g/mL
300
A sequence of organisms each feeding on the next, showing how energy is transferred from one organism to the other
What is a food chain?
300
What four processes can change the size of a population?
-Births -Deaths -Immigration -Emigration
300
True or False? A metal and a non-metal make a molecular compound.
FALSE Metal + non-metal = ionic compound Non-metal + non-metal = molecular compound
300
Why are electrical wires coated with rubber or plastic?
They are insulators
300
Find the mass of 250.0 mL of benzene. The density of benzene is 0.8765 g/mL
219.125g
400
Materials like plastic, wood, ceramics and rubber have high resistances so that it is almost impossible for electric currents to flow through them
What are Insulators?
400
What is the formula for Photosynthesis?
Carbon dioxide + water ---> sugar + oxygen CO2 + H20 ---> C6 H12 06 +02
400
Name the following ionic compounds: NaCl MgO Li2S CaO
Sodium chloride Magnesium oxide Lithium sulfide Calcium oxide
400
True or false? Charging by induction produces a separation of charge in the object that is charged
True
400
The voltage in a circuit is 115 V and the resistance is 15.0 ohms. What is the current?
7.67 A
500
If the current is flowing along a wire is increased, then the voltage will also increase
What is Ohm's Law
500
How many trophic levels are there? What type of organisms live in each?
First-Producers Second-Primary consumers Third-Secondary consumers Fourth-Tertiary consumers
500
What are the four chemical families discussed in class and list some characteristics of each
Alkali Metals- shiny, silvery, soft, highly reactive) Alkaline Earth Metals- shiny, silvery, not as soft, not as reactive, burn with bright colourful flames Halogens- very reactive, poisonous in large amounts Noble gas- stable, unreactive, glow brightly when electrically current passed through, non-toxic
500
Rabbit fur is above rubber in the electrostatic scale series. What would happen if the rabbit fur were rubbed with a rubber balloon?
The rabbit fur would take on a positive charge and the balloon would take on a negative charge
500
An alarm clock is connected to a 25.0 V battery and draws a current of 0.300 A. What is the resistance of the alarm clock?
83.33 ohms