Science Unit 1 (UK GCSE EDEXCEL)

themarkkiley
Flashcards by , created almost 5 years ago

Unfinished. Taken from Edexcel Science Student Book published by Pearson. All information taken from the glossary. This is only unit 1 of Biology, Chemistry and Physics. I will upload the rest of the glossary for all of the units

369
23
0
themarkkiley
Created by themarkkiley almost 5 years ago
Key word flashcards
I M Wilson
Using GoConqr to teach science
Sarah Egan
B2, C2, P2
George Moores
Conceptos Generales De Robótica
fede ramos
Biological molecules
sadiaali363
Combined Science
Micheal Heffernan
Physical and Chemical Changes
za4321
Chemical and Physical Changes Flashcards
za4321
Science Exam review
ken-hakka
Using GoConqr to study science
Sarah Egan
Question Answer
Define: Acid rain Rain that is more acidic than normal, due to Sulphur and nitrogen oxides dissolved in it.
Define: Acquired Characteristic A characteristic that is changed by the environment rather than inherited from your parents.
Define: Adaptation Organisms have certain characteristics that allow them to survive in particular places. These characteristics are called adaptations.
Define: Addicted When the body is dependent on a drug and doesn't work properly without it.
Define: Algae (Singluar - Alga) A group of organisms that can make food using photosynthesis but do not have roots or leaves, like plants. These organisms include seaweeds and some single-celled organisms
Define: Alkali A soluble base
Define: Alkane A hydrocarbon with only single bonds between two carbon atoms.
Define: Alkene A hydrocarbon with at least one double bond between carbon atoms.
Define: Allele Every gene comes in different types called Alleles. So a gene for eye colour may come in a 'blue type' allele and a 'brown type' allele.
Define: Alloy Mixture of metals
Define: Alloy steel An alloy of iron with other metals (steel itself is not an alloy)
Alpha Particles A type of ionising radiation emitted by a radioactive material.
Define: Alternating Current Current whose direction changes many time each second.
Define: Amphibians Vertebrates that have a moist, permeable skin and lay jelly-coated eggs in water.
Define: Amplitude The maximum distance of particles in a wave from their normal positions.
Define: Antacid A compound that is used to neutralise acid in the stomach
Define: Antibacterial Antibiotic that kills or slows the growth of bacteria.
Define: Antibiotic Substance that can kill or slow the growth of microorgansims
Define: Antifungal Antibiotic that kills or slows the growth of fungi.
Define: Antiseptic Substance that is used to stop the spread of Pathogens.
Define: Aqueous Solution Mixture formed when a substance dissolves in water.
Define: Atmosphere Layers of gases that surrounds the earth.
Define: Atom The smallest part of an element that can take part in chemical reactions.
Define: Autotrophic feeding Make food from small molecules using an energy source, such as light in photosynthesis.
Define: Auxin Plant hormone that affects the growth and elongation of cells in plants.
Define: Axon The long extension of a neurone that carries an impulse away from the cell body towards other neurones.
Define: Bacteria (Singular - Bacterium) Simple organisms consisting of one cell that does not contain a nucleus.
Define: Bacterium (Plural - Bacteria) Microscopic organisms, some kinds of which are pathogens, such as Salmonella.
Define: Balanced Equation Description of a reaction using the symbols and formulae of the reactants and products.
Define: Base A substance that will react with an acid to form only salt and water.
Define: Beta particles A type of ionising radiation emitted by radioactive material.
Define: Big bang theory The theory that says that the universe began from a tiny point with huge energy, and has been expanding ever since.
Define: Binomial system System of naming organisms using two latin words.
Define: Biodegradable A substance that can be broken down by microorgansims.
Define: Biodiesel Diesel fuel made from plant material.
Define: Biodiversity A variety of species of plants and animals.
Define: Biofuel Any fuel made by humans from animal or plant materials that have recently died.
Define: Biogas Methane made from animal manure or biodegradable waste from homes and farms
Define: Biomass The total mass in living organisms, usually shown through the dry mass.
Define: Birds Vertebrates that have lungs, feathers and beaks, and lay hard shelled eggs.
Define: Bitumen The fraction of crude oil with the longest molecules. It is used for making roads and roofs.
Define: Black hole Core of a red supergiant that has collapsed (imploded). Black holes are formed if the remaining core has a mass more than three times of our sun.
Define: Blackspot fungus Fungus that damages roses and is killed by sulphur dioxide in the air. Good indicator of clean air.
Define: Blood glucose regulation The control of concentration of glucose in the blood by the body.
Define: Blood worm Aquatic species that is an indicator of polluted water.
Define: Body mass index (BMI) Estimate of how healthy a person's mass is for their height.
Define: Boiling point The temperature at which all of a substance starts to turn into a gas.
Define: Bonds Forces of attraction holding atoms together in a molecule.
Define: Bromine test A test for unsaturation. Bromine water turns colourless when mixed with an unsaturated molecule.
Define: Bromine water A solution of bromine and water that turns colourless when mixed with an unsaturated molecule.
Define: Carats A measure of the purity of gold with pure gold being 24 carat.
Define: Carbon brushes Blocks of carbon connected to a circuit. They press against slip rings to make an electrical connection between the circuit and the spinning coil in a generator.
Define: Carbon cycle A sequence of processes by which carbon moves from the atmosphere, through living organisms, into sediments and into the atmosphere again.
Define: Carbon monoxide A toxic gas (CO), it is found in tobacco smoke that replaces oxygen in the blood, and so reduces the amount of oxygen carried around the body.
Define: Carbon neutral A fuel or process that does not add any carbon dioxide to the atmosphere overall.
Define: Carcinogen Something that causes cancer, such as tar in tobacco smoke.
Define: Cataracts When the lens of the eye becomes cloudy.
Define: Cell membrane Thin layer around a cell that controls what goes into and out of the cell.
Define: Cell wall Outer stiff part of some cells that helps to support a cell. Plant cell walls are made of cellulose.
Define: Cement Material made by heating limestone with clay.
Define: Central nervous system (CNS) The spinal cord and brain. These two organs form the main part of the nervous system, processing and controlling the transmission of electrical impulses.
Define: Chalk Sedimentary rock, mostly calcium carbonate, made from the remains of marine micro-organisms.
Define: Characteristics The features of an organisms.
Define: Chemical defence Preventing attack by the use of chemicals. For example, many plants produce chemicals that taste unpleasant and this puts puts herbivores off eating them.
Define: Chemical formula A combination of symbols and numbers that shows how many atoms of different kinds are in a particular molecule. In compounds that do not form molecules, it shows the ratio of elements in the compound.
Define: Chemical potential energy The energy stored in matter, which can be released by a chemical reaction (such as combustion)
Define: Chemosynthetic bacteria Bacteria that gets the energy they need to make their food from breaking down chemicals; they are producers.
Define: Chloroplast Green disc found in plant cells, which is used to make food for the plant using photosynthesis.
Define: Chordata Animals that have a supporting rod along the length of their body. All vertebrates belong to this group. (Chordates)
Define: Chromosome A long thread of molecule called DNA. Each chromosome contain a series of genes along its length.
Define: Cirrhosis Damage to the liver caused by drinking large amounts of alcohol over a long time.
Define: Classification The process of sorting organisms into groups based on their characteristics.
Define: Cleaner fish Fish that eat dead skin. Parasites from the skin of other fish.
Define: Climate change Changes to the Earth's climate, or changes in weather patterns on a global scale.
Define: Clinically obese When someone is very overweight for their height to an extent that has been shown by doctors to cause health problems. For adults this is defined as having a BMI of over 30.
Define: CNS Central Nervous System.
Define: Combustion Chemical reaction when substances burn, combining with oxygen to produce heat and waste products such as Carbon Dioxide.
Define: Competition When organisms need the same resources as each other, they struggle against each other to get those resources.
Define: Complete Combustion Combustion of hydrocarbons with enough oxygen present to convert all the fuel into carbon dioxide and water.
Define: Compound A substance containing two or more elements joined together chemically.
Define: Concentration The amount of a substance dissolved in a certain quantity of a liquid. g/cm^3
Define: Concrete Material made by mixing cement with sand, stones and water.
Define: Conductor (Electrical) A sample which allows electricity to pass through it.