Atoms & Elements
The subatomic particles that defines the identity of an element are ___________.
What are protons?
This is required to kickstart any chemical reaction.
What is activation energy?
This is the original source of energy for most ecospheres and plants.
What is sunlight?
This is the part of an experiment that does not change and is used as a comparison.
What is the control?
Another term for crystals/crystallines is __________.
What are extended structures?
This type of change occurs when a substance changes its shape or state of matter, but remains the same substance.
What is physical change?
This is responsible for absorbing light energy.
What is chlorophyll?
The Law of Conservation of Mass and Energy tells us __________.
Mass and Energy can neither be created nor destroyed.
Most of the mass of an atom is contained in the _______.
What is the neucleus?
This is the term for a physical change where a gas becomes a solid.
What is deposition?
This process happens when water from plants is released into the atmosphere.
What is transpiration?
This type of reaction releases energy, usually in the form of heat, light, or sound.
What is an exothermic reaction?
Highly reactive metals belong in the _________ group of the periodic table.
What is the alkali metals group?
CH4 + 2O2 →CO2 + 2H2O is an example of this type of chemical reaction.
What is combustion reaction?
This is the name of the energy stored in the bonds of glucose, created during photosynthesis.
What is chemical energy?
This type of energy is stored in objects that are not in motion, such as a stretched rubber band.
What is potential energy?
One or more physical forms of an element that occur in the same physical state are called __________.
What are allotropes?
When two clear solutions are mixed and the liquid turns cloudy, this solid substance may have formed.
What is a precipitate?
Pollution and this environmental issue caused by excess carbon dioxide can affect photosynthesis by blocking sunlight or changing water availability.
What is climate change?
This layer of the Earth is made of solid rock and includes the crust and the uppermost part of the mantle.
What is the lithosphere?