Chemistry
What is the smallest unit of an element?
atom
What is the primary source of energy for most ecosystems?
Sun
Materials that do not allow light to pass through
opaque
What is the pH range of acids?
0 to 7
What is the name for an organism that makes its own food through photosynthesis?
Producer or autotroph
materials that allow the flow of electricity
conductors
_______ is a substance made of two or more elements chemically bonded together.
compound
What is the role of decomposers in an ecosystem?
to break down dead organic matter and recycle nutrients
an electrical circuit that has multiple paths where current can travel
parellel circuit
What is the chemical formula and chemical name for salt
NaCl
sodium chloride
what is the process where sugar is broken down to produce energy (ATP)
cellular respiration
what is the fastest thing in the universe?
light
what is the difference between physical and chemical change?
physical change alters the form of a substance but not what it is, chemical change results in the formation of a new substance
This is the variety of life in a particular habitat or ecosystem
biodiversity
states that the amount of matter stays the same, when when matter changes form
Law of Conservation of Matter