Where do metals come from?

Slides:



Advertisements
Similar presentations

Advertisements

Extracting Metals Prior Learning; a) Understand what happens to carbonates when they are heated b) Know that an ore contain a metal mixed with rock c)
What is a hydrocarbon? Why are alkanes considered to be saturated?
What do all of these have in common??
What is an ore? Why do we have to use chemical reactions to extract most metals? What is the name given to the group of metals in the centre of the periodic.
Environmental Issues Human’s Degradation of the Environment Mr. Matthew Rodman Science Patria Mirabal Middle School (MS 324) New York City, New York, USA.
3 Air pollution p.268. Objectives Students should learn: that air can be polluted with smoke and gases, such as sulfur dioxide, which contributes to acid.
4.3: Air pollution by Emily and Josh. Objectives Students should learn: that air can be polluted with smoke and gases, such as sulfur dioxide, which contributes.
© GCSE April-13. Substance formedHow it is formedPotential problemsWays to reduce the problem Carbon dioxide CO­ 2 Complete.
Human Impacts on the Environment
BURNING FOSSIL FUELS By Joel J. WHAT IS THE ISSUE?  My issue is burning fossil fuels.  fossil fuels can be found in your energy at home.  when its.
The Environment & Human Impact. Humans and the Environment 10,000 years ago, there were only about 5 million people on Earth. The development of dependable.
Ashfield Direct Learning
Using Natural Resources Organisms and Their Environment Energy and Resources Pollution and Recycling.
Simple Chemical Reactions
26/04/2017 Air Quality (OCR 21st Century).
TIPS FOR ANSWERING LONGER ANSWER QUESTIONS Which command word is used? These tell you what to do. Explain, Describe, Discuss, Compare Check you know what.
Human Effects on the Environment
Extracting metals.
Environmental Issues Material choice. Woods Metals Plastics.
C1 Smart Teach 5: Fuels Fractional Distillation By what process is crude oil separated into its fractions Fractional distillation that takes place at.
7th Grade UBD – Unit 1 – Culture and Geography.  What are Natural Resources- Natural resources, such as fossil fuels and other energy sources, are unevenly.
Core Chemistry Revision To improve understanding of key topics.
AIM: How does pollution affect the environment?
Chemistry 2 Acids and alkalis Learning outcomes
C1 last minute exam revision tips!
Crude Oil Hydrocarbon Fuels.
1) What is the approximate percentage of oxygen in Earth’s modern day atmosphere? . Answer 21 %
S3 Physics - Energy
Fossil Fuels Leah, Marcelo, Alex.
Calderglen High School
Electrolysis uses electrical energy to break down (decompose)
Fossil Fuels You will learn: What a fossil fuel is.
Chemsheets AS006 (Electron arrangement)
Chemistry in our world.
Define - Physical change? Give an example of a Physical change.
L1.06 Air Pollution Lesson Outcomes How I did Targets Task 1:
5.1 The Combustion of Hydrocarbons
What is a hydrocarbon? Why are alkanes considered to be saturated?
L.O: explain the usefulness of recycling and sustainability of metals
Simple Chemical Reactions
OA2.1 Understand energy and its conservation
3.4 Energy and the environment
Biology 7: Ecology Section 2: Biotic and Abiotic Factors 9 Biotic
Human Impacts.
Paper 1 Chemistry Exam questions and markschemes to project
Environmental problems
Impacts of extracting metals
Simple Chemical Reactions
Greenhouse Effect 2.6.2B EXPLAIN THE CONCEPT OF THE GREENHOUSE EFFECT INCLUDING A LIST OF SPECIFIC GREENHOUSE GASES AND WHY CO2 IS MOST OFTEN THE FOCUS.
Chemistry Paper 2 Exam questions and Answers
16/11/2018 Air Quality (OCR 21st Century) W Richards The Weald School.
The APES Exam.
LQ: How are pollutants formed?
Question mark scheme (green pen time) Levels Expected responses Level 3 A detailed and coherent explanation is given, which logically links.
The extraction of aluminium
& Sustainable Development Goals
Resources and Conservation
Salts from metals Baseline (Flightpath D): Recall a definition of a salt. Name a salt formed between a metal and sulfuric acid or hydrochloric acid. Recall.
Explain the greenhouse effect
Combustion exothermic chemical reactions between a fuel and an oxidant accompanied by the production of heat or both heat and light in the form of either.
Renewable & Nonrenewable Resources
Water, Air, and Land Resources
Title: Climate Change Starter:
Core Chemistry Revision
Entry Level Science Chemistry in our world
5.1 The Combustion of Hydrocarbons
Presentation transcript:

Where do metals come from? Baseline (Flightpath D): Define oxidation and reduction in terms of oxygen. Describe how metals can be extracted. Further (Flightpath C&B) Identify species that are being oxidised and reduced in a chemical reaction. Explain why some metals are found uncombined in the Earth’s crust. Challenge Flightpath A): Explain how carbon or hydrogen can be used to reduce an ore. Evaluate the extraction process to obtain a metal from its ore.

Reduction by carbon Fold the paper in half then open out Add one spatula of copper oxide and two spatulas of carbon powder Use the spatula to mix the powders well Tip the mixture into a boiling tube Heat in a blue flame for several minutes Carefully tip into an evaporating basin to observe Repeat using lead oxide and carbon powder (FUME CUPBOARD REQUIRED FOR THIS)

Exam Question

Mark scheme M1.(a)     pure copper is twice as good a conductor as 99% pure copper accept reverse argument accept answers quoting 2 correct values from the graph scores 2 qualitative answer (e.g. pure copper is a better conductor than impure copper) scores 1 or answers quoting a conductivity value from the graph scores 1

0 marks No relevant content Level 1 (1–2 marks) Simple list of a limited number of points given, with no linking between ideas Level 2 (3–4 marks) A broader set of points made. There will probably not be links between ideas Level 3 (5–6 marks) Answer includes linking between ideas, showing the consequence of either not recycling or the advantage of recycling. Answers such as less fossil fuel needed so less carbon dioxide produced or less carbon dioxide produced so less global warming

examples of the points made in the response resources (recycling) conserves supplies of ores copper available for longer as (at present rate of use) copper ores will run out in about 35 years (recycling) conserves supplies of fossil fuels or energy less fuel used at a lower cost land pollution mining scars landscape or produces noise pollution mining destroys wildlife habitats (recycling) less need to mine ores / fossil fuels so less habitat destroyed or less scarring of landscape (recycling) less need to use landfill for waste atmospheric pollution burning fossil fuels produces carbon dioxide / greenhouse gas which (may) cause global warming or climate change extraction produces sulfur dioxide which causes acid rain which can kill trees / fish

(c)     grow plants accept plants absorb copper (through roots) 1 then plants are burned 1 ash (from burning) contains copper compounds 1