A-level-Science-Materials-1

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Animal Cell

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75 Terms

1

Animal Cell

A type of eukaryotic cell that has membrane-bound organelles.

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2

Fluid-Mosaic Model

A model that describes the structure of cell membranes as a mosaic of various components.

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3

Electron Microscope

An instrument that uses electrons to magnify samples up to 1 million times.

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4

Cell Membrane

A protective layer that surrounds a cell, controlling what enters and exits.

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5

Chloroplast

An organelle in plant cells that conducts photosynthesis.

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6

Mitochondrion

An organelle known as the powerhouse of the cell, generating ATP.

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7

Osmoregulation

The process of maintaining water and ion balance in cells.

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8

Limiting Factor

A factor that restricts the rate of a process.

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9

Photosynthesis

The process by which green plants convert light energy into chemical energy.

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10

Nephron

The functional unit of the kidney responsible for filtering and excreting waste.

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11

Reflection of Light

The bouncing back of light when it hits a surface.

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12

Periscope

A tool that allows observation from a hidden position using mirrors.

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13

Electrostatics

The study of electric charges at rest.

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14

Charging by Friction

The process of transferring electrons from one material to another through rubbing.

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15

Charges in Conductors

In conductors, electrons move freely, allowing electricity to flow.

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16

Gold Leaf Electroscope

An instrument used to detect electric charge.

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17

Isotope

Atoms of the same element with different numbers of neutrons.

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18

Atoms

The smallest units of matter that maintain the properties of an element.

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19

Mass Spectrometer

An instrument used to measure the masses of different isotopes.

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20

Chemical Properties

Characteristics that define how a substance interacts with other substances.

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21

Electrons

Negatively charged particles found in atoms.

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22

Protons

Positively charged particles located in the nucleus of an atom.

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23

Neutrons

Particles that have no charge and are found in the nucleus of an atom.

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24

Fundamental Particles

Protons, neutrons, and electrons, which are the basic building blocks of atoms.

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25

Relative Abundance

The proportion of a particular isotope found in a sample.

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26

Laws of Reflection

The angle of incidence is equal to the angle of reflection.

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27

Xylem

The vascular tissue responsible for the transport of water in plants.

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28

Electrolytic Process

A chemical reaction induced by passing an electric current through a solution.

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29

Oxidation

A chemical reaction involving the loss of electrons.

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30

Halogens

Reactive non-metals in Group VII of the periodic table.

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31

Salt Producing

The characteristic of halogens to react with metals to form salts.

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32

Chlorine Gas

A yellow-green gas used for disinfection and bleaching.

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33

Hydrogen Peroxide

A chemical compound useful in various chemical reactions, including oxidation.

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34

Intermolecular Forces

Forces that exist between molecules, affecting their physical properties.

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35

Atomic Structure

The arrangement of protons, neutrons, and electrons in an atom.

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36

Relative Atomic Mass

The average mass of an element's isotopes compared to carbon-12.

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37

Electrostatic Induction

Charging an object without direct contact through proximity to a charged object.

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38

Charge Transfer

The movement of electric charge from one material to another.

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39

Nucleus

The positively charged center of an atom containing protons and neutrons.

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40

Mass Number

The total number of protons and neutrons in an atomic nucleus.

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41

Scientific Method

A systematic process for investigating phenomena, acquiring new knowledge, or correcting previous knowledge.

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42

Environmental Factors

Conditions surrounding an organism that influence its growth and development.

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43

Nutrient Absorption

The process by which nutrients are taken into cells and utilized for growth.

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44

Cellular Respiration

The metabolic process by which cells convert glucose and oxygen into energy.

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45

Reactants

Substances that undergo a chemical change in a reaction.

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46

Products

Substances formed as a result of a chemical reaction.

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47

Valence Electrons

Electrons in the outermost shell of an atom that are involved in chemical bonding.

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48

Chemical Bonding

The joining of atoms to form new substances.

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49

Kinetic Energy

The energy possessed by an object due to its motion.

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50

Potential Energy

Stored energy based on an object's position or state.

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51

Thermal Energy

The energy that comes from heat, resulting from the movement of particles.

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52

Electromagnetic Waves

Waves that are propagated by simultaneous periodic variations of electric and magnetic field intensity.

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53

Gravitational Force

The force of attraction between two bodies due to their mass.

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54

Inertia

The tendency of an object to resist changes in its state of motion.

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55

Velocity

The speed of an object in a specified direction.

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56

Acceleration

The rate at which an object's velocity changes over time.

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57

Newton's Laws

Three fundamental laws of motion formulated by Sir Isaac Newton.

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58

Thermodynamics

The study of heat, work, and energy transformations.

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59

Biological Magnification

The increase in concentration of toxic substances in organisms as one moves up the food chain.

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60

Ecology

The study of interactions between organisms and their environment.

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61

Sustainable Practices

Methods of using resources that do not deplete them for future generations.

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62

Microorganisms

Tiny living organisms that can only be seen with a microscope.

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63

Enzymes

Biological catalysts that speed up chemical reactions in living organisms.

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64

Catalysts

Substances that increase the rate of a chemical reaction without being consumed.

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65

Hypothesis

A proposed explanation for a phenomenon, which can be tested scientifically.

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66

Variable

Any factor, trait, or condition that can exist in differing amounts or types.

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67

Community Health Systems

Organized efforts to improve health conditions in a community.

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68

Personal Protective Equipment

Clothing and equipment worn by health care providers to prevent exposure to infectious materials.

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69

Local Health Infrastructure

The facilities and resources available for providing health services within a community.

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70

Integrated People-Centered Primary Healthcare

An approach to health that delivers a continuum of care to populations.

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71

Public Health System

A system designed to promote health and prevent disease at a community level.

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72

Infectious Diseases

Diseases caused by pathogenic microorganisms, such as bacteria, viruses, and parasites.

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73

Pandemic Preparedness

The planning and coordination efforts in advance to manage and mitigate the impacts of pandemics.

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74

Health Promotion

Efforts to encourage healthy behaviors and environments.

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75

Disease Prevention

Strategies to prevent the occurrence or progression of diseases.

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