- Study guides, Class notes & Summaries

What are hydrocarbons? - Answer Compounds that only contain carbon and hydrogen. What are the two types of hydrocarbon? - Answer Alkanes and alkenes. What is the general formula for an alkane? - Answer CnH2n+2 Multiple choice: Hydrocarbons / Alkanes / Alkenes only have C-C single bonds. - Answer Alkanes. Fill in the gaps (1): The alkanes are a —— series; a group of elements that react in a similar way. - Answer Homologous. Multiple choice: Alkanes are saturated...

What type of reaction is photosynthesis? - Answer endothermic What is the word equation for photosynthesis? - Answer Carbon dioxide + water -> glucose + oxygen What factors can limit photosynthesis? (4) - Answer Light, temperature, amount of chlorophyll and carbon dioxide concentration. Chemically, what is the reverse of photosynthesis? - Answer respiration What type of reaction is respiration? - Answer exothermic What happens to your muscles if you work hard for...

What are all substances made out of? - Answer Atoms One type of atoms joined together - Answer Elements Two or more elements chemically bonded - Answer Compounds Two or more elements not chemically bonded - Answer Mixtures Why do scientists use chemical formulae? - Answer To find out how many compounds are in each element How are compounds separated? - Answer Electrolysis What are the reactants? - Answer Substances that are reacted What are the products?...

What is an ecosystem? - Answer An ecosystem is the interaction of a community of living organisms (biotic) with the non-living (abiotic) parts of their environment. What do organisms require from their surroundings in order to survive and reproduce? - Answer A supply of materials from their surroundings State four factors plants compete with each other for. - Answer Space, light, mineral ions, water State three factors animals compete with each other for. - Answer Food, mate...

what is a rate of reaction? - Answer the speed of a reaction what is the equation for rate of reaction? - Answer quantity of reactant used up/time taken or quantity of product formed/time taken what unit do we normally use for time? - Answer seconds what unit do we normally use for mass? - Answer grams what unit do we normally use for a rate of a reaction? - Answer grams/second you can also measure a rate of a reaction using ... - Answer a graph how do you c...

What is the effect of adding NaOH to iron (III) (Fe³⁺)? Then adding ammonia solution? - Answer Adding NaOH: red/brown precipitate. Insoluble in excess. Adding ammonia solution: same as before. What is the effect of adding NaOH to zinc (Zn)? Then adding ammonia solution? - Answer Adding NaOH: white precipitate forms. Dissolves in excess to form colourless solution. Adding ammonia solution: same as before. State the colours for lithium (Li⁺), sodium (Na⁺), potassium (K⁺), ...

pure substance - Answer single element, compound or substance not mixed with another substance physical processes - Answer mixtures can be separated by... simple distillation - Answer evaporating water and condensing it in a separate container fractional distillation - Answer evaporating liquids with different boiling points filtration - Answer screening and sieving to remove solids chromatography - Answer using a solvent to separate pigments so you can identify ...

Plasma - Answer Transports dissolved substances around the body red blood cells - Answer Transports oxygen from lungs to body cells white blood cells - Answer Protects body against infection Ateries - Answer Carries blood away from the heart Veins - Answer Carries blood into the heart Capillaries - Answer Substances such as oxygen and glucose to diffuse in and out of cells Platelets - Answer Helps the blood to clot Correlation - Answer Doesn't prov...

What is a scalar quantity? - Answer One that has magnitude (size) only. What is a vector quantity? - Answer One that has magnitude (size) and direction. These are examples of scalar quantaties: - Answer Distance, speed, mass, energy. These are examples of vector quantaties: - Answer Displacement, velocity, acceleration, force, weight, momentum. What is velocity? - Answer Speed in a given direction. What is the equation for (average) speed? - Answer Distance trave...

an object or group of objects - Answer system _______ energy is the total kinetic energy and potential energy of all particles that make up a system - Answer internal the idea that there is the same amount of energy befire and after it is transferred - Answer conservation of energy energy cannot be ------- -- --------- - Answer created or destroyed = 0.5 x mass x (speed)^2 - Answer kinetic energy type of energy stored in a stretched spring - Answer elastic potent...