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100
Concrete.....
Mixed or pure substance
Pure Substance
100
What is the electromagnetic spectrum
The electromagnetic spectrum is the range of frequencies of electromagnetic radiation and their respective wavelengths and photon energies
100
Is water a pure or mixed substance
Pure substance
100
What is kinetic energy
energy which a body possesses by virtue of being in motion.
100
What is electromagnetic waves
Classically, electromagnetic radiation consists of electromagnetic waves, which are synchronized oscillations of electric and magnetic fields that propagate at the speed of light, which, in a vacuum, is commonly denoted c.
200
Which part or parts of the eye does refraction rakes place
Cornea
200
What is mass
Mass is both a property of a physical body and a measure of its resistance to acceleration when a net force is applied. The object's mass also determines the strength of its gravitational attraction to other bodies. The basic SI unit of mass is the kilogram.
200
What happens when a bulb goes out in a parallel circut
The bulbs stay on
200
What is potential energy
Energy that is saved up
200
What is mechanical waves
A mechanical wave is a wave that is an oscillation of matter, and therefore transfers energy through a medium. While waves can move over long distances, the movement of the medium of transmission—the material—is limited. Therefore, the oscillating material does not move far from its initial equilibrium position.
300
Describe the 1rst law of newtons motion
Newton's First Law states that an object will remain at rest or in uniform motion in a straight line unless acted upon by an external force. It may be seen as a statement about inertia, that objects will remain in their state of motion unless a force acts to change the motion.
300
What is weight
In science and engineering, the weight of an object is related to the amount of force acting on the object, either due to gravity or to a reaction force that holds it in place. Some standard textbooks define weight as a vector quantity, the gravitational force acting on the object
300
What is friction
the resistance that one surface or object encounters when moving over another.
300
What is refraction?
the fact or phenomenon of light, radio waves, etc. being deflected in passing obliquely through the interface between one medium and another or through a medium of varying density.
300
What is Gravity?
A force pulling you towards the ground
400
Describe newtons 2nd law of motion
Newton's second law of motion pertains to the behavior of objects for which all existing forces are not balanced. The second law states that the acceleration of an object is dependent upon two variables - the net force acting upon the object and the mass of the object.
400
What is physical change
Physical changes are changes affecting the form of a chemical substance, but not its chemical composition. Physical changes are used to separate mixtures into their component compounds, but can not usually be used to separate compounds into chemical elements or simpler compounds.
400
What is the law of Conservation of energy
In physics and chemistry, the law of conservation of energy states that the total energy of an isolated system remains constant; it is said to be conserved over time. This law means that energy can neither be created nor destroyed; rather, it can only be transformed or transferred from one form to another
400
What is diffraction?
the process by which a beam of light or other system of waves is spread out as a result of passing through a narrow aperture or across an edge, typically accompanied by interference between the wave forms produced.
400
What type of wave is this?
Mechanical
500
Describe newtons 3rd law of motion
A force is a push or a pull that acts upon an object as a results of its interaction with another object. ... These two forces are called action and reaction forces and are the subject of Newton's third law of motion.
500
What is chemical change
In other words, a chemical change is a chemicalreaction involving the rearrangement of atoms. While a physical change can often be reversed, achemically change typically cannot be, except through more chemical reactions. When a chemical change occurs, there is also a change in the energy of the system.
500
What is convection?
the movement caused within a fluid by the tendency of hotter and therefore less dense material to rise, and colder, denser material to sink under the influence of gravity, which consequently results in transfer of heat.
500
What is photosynthesis?
the process by which green plants and some other organisms use sunlight to synthesize foods from carbon dioxide and water. Photosynthesis in plants generally involves the green pigment chlorophyll and generates oxygen as a byproduct.
500
what wave is this?
Electromagnetic