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3 
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is an indirectly observed quantity which comes in many forms, such as kinetic energy, potential energy, radiant energy, and many others 
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4 
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is an elementary particle, the quantum of light and all other forms of electromagnetic radiation, and the force carrier for the electromagnetic force 
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5 
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is a change in position of an object with respect to time and its reference point. Motion is typically described in terms of velocity, acceleration, displacement, and time. 
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7 
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refers to the phenomena of the physical world, and also to life in general. It ranges in scale from the subatomic to the cosmic. 
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9 
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is a nuclear reaction in which two or more atomic nuclei collide at very high speed and join to form a new type of atomic nucleus 
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10 
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is an isolated event in which two or more moving bodies (colliding bodies) exert forces on each other for a relatively short time. 
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11 
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is the branch of science concerned with the behavior of physical bodies when subjected to forces or displacements 
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13 
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is an intrinsic form of angular momentum carried by elementary particles, composite particles (hadrons) 
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14 
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is the branch of physics which involves the behaviour and properties of light, including its interactions with matter and the construction of instruments that use or detect it 
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18 
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as a branch of astronomy, is the study of the largest-scale structures and dynamics of the universe and is concerned with fundamental questions about its formation and evolution. 
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20 
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is the boundless three-dimensional extent in which objects exist and events occur and have relative position and direction 
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21 
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is generally used to refer to observations of electromagnetic radiation at ultraviolet wavelengths between approximately 10 and 320 nanometres 
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24 
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is the interdisciplinary science that deals with the study of all mechanical waves in gases, liquids, and solids including vibration, sound, ultrasound and infrasound 
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27 
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is the sky, conceived as a solid dome.According to Genesis, God created the firmament to separate the 'waters above'from those below. The word is anglicised from Latin firmamentum. 
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28 
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is generally considered to be a substance (often a particle) that has rest mass and (usually) also volume. 
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30 
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is the branch of mechanics that is concerned with the analysis of loads (force and torque, or 'moment') on physical systems in static equilibrium 
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32 
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a branch of physical science, is the study of the composition, properties and behavior of matter. 
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34 
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is a natural science that deals with the study of celestial objects; the physics, chemistry, and evolution of such objects; and phenomena that originate outside the atmosphere of Earth. 
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37 
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is the field of physics that studies atoms as an isolated system of electrons and an atomic nucleus. 
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39 
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is the natural phenomenon by which physical bodies appear to attract each other with a force proportional to their masses. 
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40 
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is a circular movement of an object around a center (or point) of rotation. 
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43 
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is the very dense region consisting of protons and neutrons at the center of an atom. 
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46 
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light is electromagnetic radiation with longer wavelengths than those of visible light 
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48 
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is a mechanical wave that is an oscillation of pressure transmitted through a solid, liquid, or gas, composed of frequencies within the range of hearing 
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1 
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is any influence that causes an object to undergo a certain change, either concerning its movement, direction, or geometrical construction 
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2 
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is commonly defined as the totality of existence,including planets, stars, galaxies, the contents of intergalactic space, and all matter and energy. 
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3 
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 a subatomic particle with a negative elementary electric charge. 
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6 
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is the academic discipline of defining groups of biological organisms on the basis of shared characteristics and giving names to those groups 
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8 
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is a process that leads to the transformation of one set of chemical substances to another. 
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10 
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refers to depends on the context. When discussing special relativity, it refers to the Newtonian physics which preceded relativity 
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12 
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is fossilized tree resin (not sap), which has been appreciated for its color and natural beauty since Neolithic times. 
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15 
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a part of natural philosophy and a natural science that involves the study of matter 
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16 
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is a general purpose device that can be programmed to carry out a finite set of arithmetic or logical operations. 
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17 
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is the product of the mass and velocity of an object. 
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19 
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the set of physical phenomena associated with the presence and flow of electric charge. 
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22 
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is a dimension in which events can be ordered from the past through the present into the future 
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23 
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 is a chemical compound with the chemical formula H2O.  
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25 
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is a region of space (a thermodynamic system), throughout which all physical properties of a material are essentially uniform. 
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26 
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is energy transferred from one body to another by thermal interactions. 
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29 
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s a basic unit of matter that consists of a dense central nucleus surrounded by a cloud of negatively charged electrons. 
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31 
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is any mathematical model that combines space and time into a single continuum.  
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33 
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is electromagnetic radiation that is visible to the human eye, and is responsible for the sense of sight. 
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35 
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is an electrically neutral, weakly interacting elementary subatomic particle 
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36 
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is a property of materials that respond to an applied magnetic field that cause the material to be either attracted or repelled. 
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38 
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refers to the quantity of matter in an object. 
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41 
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is a branch of physics dealing with physical phenomena at microscopic scales 
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42 
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refers to the physical devices used to store programs (sequences of instructions) or data  
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44 
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is one of the the four fundamental states of matter (the others being solid, gas, and plasma) 
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45 
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is the study of rigid matter, or solids, through methods such as quantum mechanics, crystallography, electromagnetism, and metallurgy. 
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47 
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process in which the nucleus of an atom splits into smaller parts (lighter nuclei), often producing free neutrons and photons (in the form of gamma rays) 
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