Jhaque

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...

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...