Jhaque

Why must the anode be replaced regularly? The anode must be replaced regularly because the oxygen produced at the anode reacts with the carbon in the graphite forming carbon dioxide gas What are exothermic reactions? Exothermic reactions are reactions that transfer energy to their surroundings What happens to the temperature of the surroundings in an exothermic reaction? In an exothermic reaction the temperature of the surroundings gets increases Give three examples of exotherm...

THIS EXAMS COVERS AQA GCSE AND AQA A LEVEL BIOLOGY EXAMS PAPERS 1 AND 2.

What are photosynthetic organisms? Producers of biomass for life on Earth What is a food chain? A feeding relationship within a community What is a producer? An organism that synthesises molecules Give an example of a producer A green plan or alga that make glucose by photosynthesis What is a primary consumer? An organism that eats a producer What is a secondary consumer? An organism that eats a primary consumer What is a tertiary consumer? An organism that e...

What is biodiversity? The variety of species of organisms that exist in one ecosystem. How does human development impact biodiversity? It usually results in reduced biodiversity due to habitat destruction. What is one impact of land development on ecosystems? Destruction of habitats, such as Peat Bogs, which reduces biodiversity. What is the effect of deforestation on ecosystems? It reduces biodiversity and releases CO2 when trees are burned. What does a pyramid of biomas...

Write a paragraph using the terms probability and chance if the different or association from stats results at P 0.001 has a calculated value greater than the criterial value. The probability of the difference or association being due to chance is less than 0.1% ; Therefore, there is a significant difference or association between the two means/variables Describe how you would calculate dry mass Heat at 100°C / heat to temp to evaporate water; Weigh and heat until no further change in ma...

Electron Microscope A microscope that fires electrons at objects and then creates a very detailed image. What 3 organelles do plant cells have that animal cells don't? what do they do? - Chloroplast - absorb light for photosynthesis - vacuole - stores cell sap - structure and support (keeps cell rigid) - Cell wall - made of cellulose - structure and support What are 4 key features of bacterial cells? - Small size - Cell wall - Cell membrane - loop of DNA (no nucleus) ...

What happens in photosynthesis and is it a endo or exothermic reaction Taking energy from light and locking it up in glucose. Endothermic reaction- takes in energy Requirements for photosynthesis Chlorophyll (the green pigment in leaves) Water Carbon dioxide Sunlight Effect of co2 on rate of photosynthesis (what it looks like on graph) Co2 increases rate of photosynthesis increases but only up to a point, then curves and straight Light intensity on photosynthesis (what it lo...

What are antibiotics? Drugs that kill or prevent the growth of bacteria without killing healthy body cells What is the problems with antibiotics? Bacteria can mutate and become resistant to an antibiotic How do bacteria make us feel ill? Producing toxins that damage cells and tissues Digitalis Used to treat heart conditions Developed from a chemical found in foxgloves What are monoclonal antibodies? Produced from lots of clones of a single white blood cell They're a...

Is respiration endothermic or exothermic? Exothermic - transfers energy to the environment How do organisms use the energy transferred by respiration? 1) To build up larger molecules from smaller ones e.g. proteins from amino acids 2) In animals, it's used to allow the muscles to contract 3) In mammals and birds, the energy is used to keep their body temperature steady in colder surroundings Aerobic respiration Respiration using oxygen Goes on constantly in plants and animals ...

Carbon Element which is more reactive than many metals and so can be used to extract them from their ores Sodium hydroxide + sulfuric acid --> Sodium sulfate + water Sodium carbonate + nitric acid Sodium nitrate + water + carbon dioxide Substances have high melting points because.. There are strong bonds between their particles Substances DO conduct electricity if... they contain free moving electrons or ions Metals are malleable and ductile AND graphite is soft ...

What happens in an electrochemical cell? The chemical reactions between the electrodes & the electrolyte set up a charge difference between the electrodes If the electrodes are connected by a wire, the charge is able to flow & electricity is produced A voltmeter can be connected to the circuit to measure the voltage of the cell What causes the charge difference (voltage) in an electrochemical cell? Different metals react differently with the same electrolyte What affects the voltag...

Why does a low temperature produce a higher yield of ammonia? The forward reaction is exothermic so a lower temperature moves the equilibrium to the right to increase the temperature making more products Why does a high pressure increase the yield of ammonia? There are fewer molecules on the right hand side of the reaction so the equilibrium will shift to the right to reduce the pressure Why is a temperature of 450°C used in the Haber process? It is a compromised temperature to pro...

Dynamo effect Inducing current in a wire by moving it in a magnetic field Generator effect Inducing potential in a coil by rotating it Alternating current (AC) Current that changes direction periodically Direct current (DC) Current flowing in one direction Transformer Device changing voltage through electromagnetic induction Step up transformer Increases voltage and decreases current Step down transformer Decreases voltage and increases current National ...

Jill and Adkins are married and live in Texas. They saved for a number of years and purchased a home. In this case, the form of ownership is most likely to be: Community property A trust that is created under the terms of a will is a(n) _____________ . Testamentary trust A property is owned by two unmarried individuals without right of survivorship. The form of ownership is most likely: Tenancy in common Dwayne and Beth, each single persons, own a parcel of land as joint tenant...

Elements of a Listing Agreement - Agency relationships - Brokerage fees - Property condition - Relationships with buyers - Market value of the property being listed - Local market conditions Additional items: - Permission to place a sign on the property - Permission to place a lockbox on the property - Permission to advertise the property online - Other provisions regarding showing times and instructions The Statute of Frauds - is a body of law that requires certain contracts ...

special warranty deed grantor promises to warrant and defend title, but only against claims which may have arisen during his or her period of ownership bargain or sale deed deed with no guarantees or warranties. Grantor implies ownership or the right to transfer title but does not provide a warranty of title quitclaim deed deed with no guarantees, warranties or covenants. grantor does not even claim to own the property. This type of deed most often used to clear up a cloud on the ti...

Final rule mandates the use of 2 disclosures that help the consumer in understanding the key features, costs and risk: 3 pages loan estimate & closing disclosure forms. Closure Disclosure (CD) is always compared to the loan estimate RESPA (Real Estate Settlement Procedures Act) implements Consumer Federal Protection Bureau Interstate Land Sale Full disclosure Act 1968 Passed by congress to protect consumers from fraud in the sale or lease of land Consideration somethi...

Quitclaim Deed A deed with no guarantees or warranties - it offers the buyer the least protection - can be used to correct or cure a defect or cloud on title Title evidence of ownership Descendant An individual who inherits property by intestate succession acquires title by descent Reliction Gradual recession of water leaving land permanently uncovered Assemblage and plottage combining several parcels of land into one Fee Simple Ownership the complete individual ow...

Professional land surveying practices act Set forth the definitions for land surveying and its practices in the State of Texas. The street address allows the property to be easily lo- cated, and is a valid legal description because it includes detail as to corners, boundaries and quantity of property described. False Field work often involves sometimes involves activity in rugged terrain, but individuals considering a surveying profession do not necessarily have to enjoy or get used ...

Exceptions to the requirement for completion of a Seller's Disclosure Notice, including sales: 1. Pursuant to a court order or foreclosure sale 2. By a bankruptcy trustee 3. To a lienholder by the owner of a property 4. By a mortgagee (lender) who has acquired the property through a foreclosure or a deed in lieu of foreclosure 5. By a fiduciary (e.g., an executor, trustee or guardian) in the course of administration of a decedent's estate, guardianship, conservatorship or trust 6. Fr...