Ecology
Define "biotic" and give two examples.
All living things in the environment
What is the difference between a pure substance and a mixture? Give two examples of each (element, compound, heterogenous and homogenous)
A pure substance has a definite composition and cannot be separated by physical means. A mixture is a blend of two or more pure substances that can be separated by physical means.
What is DNA, what is it's purpose and what is it made of?
DNA is the molecule that carries the genetic instructions for an organism, it determines the looks/functions/behaviours of an organism, it is made from repeating units called nucleotides.
What are the two types of batteries and what do they use as electrolytes?
Wet cell: acid solution
Dry cell: moist paste
What is the difference between a food chain and a food web? Which is better at describing an ecosystem and why?
A food chain is one path, a food web shows all the interacting relationships between organisms in an ecosystem, this makes it a better way to demonstrate energy flow.
List two properties of metals, two properties of non metals, and the name of a group of each.
Non-metals: gas at room temp, not shiny/malleable/ductile, not good conductors (halogens and noble gases).
What are the three phases of the cell cycle? Bonus 50 points if you can name the phases within the stages.
Interphase (G1, S, G2), Mitosis (PMAT) and cytokinesis.
Define static charge, give an example, and list one of the 3 laws of static charge.
Static charge is an electrical charge that can be held in one place.
Opposites attract, like charges repel, charged objects attract neutral objects.
What creates the Great Ocean Conveyor Belt, and what two things does it move around the world?
Cold, salty water sinks and fresh, warm water rises. It moves heat and nutrients around the world.
Draw a Bohr diagram of an ATOM of sodium and an ION of chlorine.
Whiteboard
What are the two types of sexual fertilization and give an example for each type.
Internal fertilization
External fertilization
What are the two ways to charge an object?
Give an example of an insulator and a conductor
Conduction (touching with transfer of electrons) and Induction (no touching, no transfer of electrons)
Insulators: rubber, plastic, wood, pure water
Conductors: copper wire, aluminum, salt water
Give the formula for photosynthesis, does it store or release energy?
carbon dioxide plus water plus sunlight makes glucose and oxygen, stores energy.
Covalent Compounds:
Write the name: S2F10
Write the formula: phosphorous triiodide
disulfur decafluoride
PI3
Give the name and example of a type of asexual reproduction, as well as an advantage and a disadvantage of asexual reproduction.
Binary Fission, Budding, Fragmentation, Vegetative Reproduction, Spore Formation
Advantages: lots of offspring from one parent, large colonies outcompete, energy not required for a mate
Disadvantages: clones so one negative mutation is bad, too close together and compete for nutrients/space, bad conditions can kill the whole colony
Draw a circuit diagram with two light bulbs, two switches and three cells. Design your circuit so that one lightbulb is on and one lightbulb is off.
Drawing
Define eutrophication.
Too much fertilizer washes into aquatic ecosystems, causing an algae bloom, which blocks sunlight from reaching plants, which kills the plants, which means the aquatic ecosystem runs out of oxygen, killing everything else.
Ionic Compounds:
Write the formula: magnesium phosphate
Write the name: Ni2S3
Mg3(PO4)2
nickel (III) sulfide
Give 3 things that are UNIQUE about mitosis and meiosis, and 2 things that are the SAME
Mitosis: produces 2 identical diploid cells after one cell division, used in growth/repair/asexual reproduction
Meiosis: produces 4 unique haploid cells after two cell divisions, used for egg/sperm cells
Same: both use PMAT, both are cell division
1. A 6V battery is connected to a 10 ohm resistor. What is the current flowing in the circuit?
2. A light bulb with a resistance of 30 ohms is connected to a battery. If the current in the light bulb is 0.2A, what is the voltage of the battery?
3. A current through a resistor in a circuit is 1.5A. If the potential difference across the resistor is 6V, what is the resistance of the resistor?
1. 0.6A
2. 6V
3. 4 ohms