6th Grade
Matter and Energy
Key Terms
 

Absorption of light- the __ is the one way that light interacts with matter. It occurs when light is absorbed or taken in by matter. 

Burning-__ is a chemical change in which oxygen combines with certain other compounds, such as hydrocarbons. Carbon dioxide and water are some of the products of __. 

Carbon dioxide- (CO2) is a colorless, odorless gas that is not combustible and is slightly heavier than air. It is a compound of 2 elements, carbon and oxygen. It can produce by adding baking soda to vinegar. 

Chemical change- a ___ in matter occurs when new substances are formed, different than the substances present before the chemical reactions occurs. 

Chemical energy- is energy associated with chemical reactions, in which energy is exchanged between molecules. The atoms rearrange into different molecules, and chemical changes take place. 

Compound- a __ is a chemical substance formed when atoms of 2 or more elements join together to form molecules of a new substance. Carbon dioxide and water are examples of __. Conduct – to carry or transmit heat electricity or sound. 

Corrosion- __ is any chemical change that causes a material to be worn away. 

Electrical energy- is energy associated with electrons in motion. 

Electromagnet- is a magnet that is made by placing a piece of iron inside a coil or wire through which an electric current is moving. __ are an important part of all motors. 

Element- is a chemical substance that is composed of only one type of atom. 

Endothermic- Characterized by or formed with the absorption of heat. 

Energy- is a concept used to measure changes in matter. The affects of __ can be observed in different phenomena. 

Exothermic- chemical reaction is characterized by or formed by the giving off of heat. 

Heat energy- is energy transferred from a warmer to a colder object due to their differences in temperature. 

Illumination- is the common phenomena associated with light, which enables the eye to see objects 

Light energy- is energy that enables a human observer to see objects.  

Magnetic energy- is energy associated with the magnetic force that fills the space around a __ or a current-carrying wire. 

Mechanical Energy is energy associated with an object due to its position or movement. 

Metal- an element that is shiny, a conductor of heat and/or electricity and can be rolled pounded or stretched into various shapes. Iron, gold, aluminum, and copper are examples of __. 

Mixture- A combination of two or more substances that have not combined chemically and that can be separated by physical means. 

Nuclear energy- is energy that can be made available by changes in the nucleus of an atom, energy from the stars and __ reactors are ex: of nuclear energy. Heat and light result from nuclear reactions. 

Opaque- material absorbs and scatters light. No light is transmitted. 

Oxygen- is a colorless, odorless, tasteless gas. It’s an element that reacts readily with other elements and compounds. It is involved in the chemicail reactions that occur in burning and rusting. 

Phenomenon- is an event, which can be described or explained, in scientific terms. The plural form of this word is ___. 

Physical change- in matter occurs when a substance is changed in size, shape, or state of matter. No new substances are formed. 

Product- is the new substances(s) that result from a chemical reaction. A __ has different properties from the reactants. 

Radiation- is a method of transferring energy by sending heat and light out in waves from a warm object. 

Reactant- is the original substances involved in a chemical __. 

Reflection of light- light that is the return of light waves from a surface mostly in one direction. It is one way that light interacts with matter. 

Refraction of light- describes light that is bent when transmitted thought matter. It is one way that light interacts with matter. 

Rusting- is as form of corrosion of iron and iron alloys these undergo chemical reactions when exposed to water and oxygen gas.

 Scattering of light- is the return of light waves in many directions after interacting or striking a surface. It is one way that light interacts with matter. 

Solar energy-  is energy of the sun. Nuclear reactions occur on he sun and result in a radiation of light and heat through space. 

Sound energy-  means the energy of __. Vibrations of many molecules through a material produce sound. 

Temperature- is the measure of how hot something is. A substance’s __ depends on the motion of all its molecules. 

Thermometer- a __ is a tool used to measure temperature. 

Translucent- a __ material allows some light to be transmitted. The rest of the light is scattered and absorbed. 

Transmission of light- the __ is one way that light interacts with matter. Materials that __ light can be seen through and are called transparent or translucent. 

Transparent- A __material allows most light to be transmitted or passed through.  Little light is scattered and absorbed.