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Questions and Answers
What is the charge of the bicarbonate ion?
Which of the following ions has a charge of -3?
Which metal ion can have a +2 or +4 oxidation state?
What is the charge of the sulfate ion?
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Which of the following correctly describes the copper ion?
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Which option below is an acid commonly found in the home?
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The chemical symbol that represents an atom with 19 protons is?
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A banksia plant has seed pods that are activated for germination by chemical and heat signals from combustion. This is an adaptation to?
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What are the products of a reaction between an acid and a metal?
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Which of the following diagrams best models a mixture?
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In an electric circuit diagram, what does this symbol represent?
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Below is a food chain. The snake is described as a?
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What is the word equation that represents photosynthesis?
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What is the primary reason farmers set traps?
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Which organism is NOT mentioned as being trapped by farmers?
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What type of competition is demonstrated by owls and foxes?
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Which of the following best describes mutualism?
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Which of these is an example of herbivory?
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What role do grasshoppers play in the described food web?
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Why are owls considered a protected species?
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What is an outcome of the symbiotic relationships described in the paragraph?
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Which scientist is associated with the Plum Pudding Model?
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What is the correct chemical formula for Sodium Fluoride?
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What is the scientific name for Calcium Oxide?
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What key feature characterizes the Plum Pudding Model?
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Which of the following compounds is represented by the formula MgCl2?
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In Outskirtsville, which animals are primarily attracted by the presence of mice and rabbits?
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What challenge do farmers in Outskirtsville face?
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What negative impact do invasive grasses have on crops in Outskirtsville?
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Which of the following best describes the relationship between pests and their predators in Outskirtsville?
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What is the chemical formula for Lithium Sulfide?
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What is the pH range typically associated with acids?
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What is the main product of the neutralisation reaction between sulfuric acid and potassium hydroxide?
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Which characteristic is typical of a base?
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What type of substance is calcium carbonate in the reaction with hydrochloric acid?
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What is the expected behavior of hydrochloric acid when mixed with calcium carbonate?
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Which of the following best describes a neutralisation reaction?
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Which of the following indicates that a substance is likely caustic?
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In the context of taste, how do acids typically differ from bases?
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Study Notes
Polyatomic Ions and Valencies
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Polyatomic ions: Groups of atoms that act as a single unit with a charge.
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Polyatomic Ions with a -1 Charge:
- Bicarbonate (or hydrogen carbonate): HCO3-
- Hydroxide: OH-
- Nitrate: NO3-
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Polyatomic Ions with a -2 Charge:
- Sulfate: SO42-
- Carbonate: CO32-
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Polyatomic Ions with a -3 Charge:
- Phosphate: PO43-
Metal Ions
- Iron: Fe2+ or Fe 3+
- Copper: Cu1+ or Cu2+
- Lead: Pb2+ or Pb4+
- Zinc: Zn2+
- Tin: Sn2+ or Sn4+
Science Assessment Task Reflection Sheet
- Provides a framework for students to reflect on their learning journey.
- Covers areas such as:
- Class work participation and effort
- Personal study strategies and effort
- Exam performance
- Future planning and improvement strategies
- A section for written comments and reflections, allowing students to summarize key learning points
- Utilizes a scale for students to rate their learning in each area
Questions
- Question 1: Commonly found acid in the home - Citric acid (C)
- Question 2: Chemical symbol for an atom with 19 protons - Potassium (A)
- Question 3: Banksia plant's seed pod adaptation - Bushfire (C)
- Question 4: Products of a reaction between an acid and a metal - Hydrogen gas and metal salt (B)
- Question 5: Diagram representing a mixture - (Diagram with different parts mixed together)
- Question 6: Circuit diagram - Switch, a lamp and a battery (D)
- Question 7: Snake's role in a food chain - Tertiary consumer (B)
- Question 8: Word equation for photosynthesis - Carbon dioxide + water oxygen + glucose (A)
- Question 9: Symbol representing an ammeter in an electric circuit diagram - Ammeter (B)
- Question 10: Kelp forest and sewage data - Kelp forests are lower in Sydney, because sewerage discharge is high (C)
- Question 11: Non-metal element - Carbon (C)
- Question 12: Thompson's Plum Pudding Model
- Thompson developed the Plum Pudding Model.
- Negatively charged electrons (plum pieces) embedded in a positively charged sphere (pudding).
- Question 12 (c) Chemical Formulas
- Sodium fluoride: NaF
- Magnesium chloride: MgCl2
- Question 12 (d) Scientific Names
- CaO: Calcium oxide
- Li2S: Lithium sulfide
Outskirtsville Food Web
- A food web is provided, showing the relationships between organisms in Outskirtsville.
- Arrows are used to show the direction of energy flow (from prey to predator).
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Relationships include:
- Farmers growing crops.
- Invasive grasses, mice, and rabbits as pests that eat the crops.
- Owls and foxes as predators of mice and rabbits.
- Foxes also eat owls, resulting in farmers trapping foxes.
- Birds eating insects that eat invasive grasses and grains.
Symbiotic Interactions in Outskirtsville
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Herbivory:
- Rabbits eating carrots and grains is an example of herbivory.
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Interspecific Competition:
- Owls and foxes compete for the same resource (rabbits).
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Mutualism (Example outside of the diagram):
- Definition: A relationship where both organisms benefit.
- Example: A bee pollinating a flower, the bee gets nectar, and the flower gets pollinated.
Acids and Bases
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Comparison of Acids and Bases:
- Taste: Acids are sour, bases are bitter.
- pH: Acids have a pH below 7, bases have a pH above 7.
- Damage: Acids are corrosive, bases are caustic.
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Neutralisation Reaction:
- A reaction between an acid and a base that produces salt and water.
- Chemical word equation for sulfuric acid and potassium hydroxide: Sulfuric acid + potassium hydroxide Potassium sulfate + Water
Working Scientifically: Measuring Gas Volume
- An experiment was conducted to measure the volume of gas produced during a chemical reaction.
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Materials:
- Calcium carbonate (30g)
- Hydrochloric acid (various volumes)
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Procedure:
- Calcium carbonate was reacted with different volumes of hydrochloric acid.
- The volume of gas produced was measured.
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Result:
- Results are presented in a table (specific data needed for analysis)
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Key Observations:
- The volume of gas produced increases as the volume of hydrochloric acid is increased.
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Description
Test your knowledge on polyatomic ions and their charges, as well as various metal ions and their respective valencies. This quiz also includes a reflection section to encourage students to evaluate their learning progress and strategies for improvement. Perfect for science assessments and understanding chemical compounds.
