chapter 2: Life, Atoms, and Carbons
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27 Terms
Scientists have decided that all living things on earth share…?
5 Basic Properties
What are the five basic properties to define them as alive?
They Grow, Reproduce, Maintain Homeostasis, sense/ respond to Stimuli, and Obtain and Use Energy!
They Grow means…
Single celled organisms get bigger!
Multicellular Organisms (like humans)….
Get bigger by adding more cells
They Reproduce…
Make new, similar organisms
Homeostasis means…
maintenance of a relatively constant internal environment!
Sense and Responding to Stimuli means…
Invoke a response from an organism!
They Use Energy means…
Take food or sunlight to power their bodies!
Living organisms share 5 properties as “alive” except…
A Mule or Fire
What is Matter?
Everything that takes up space and has mass!
Matter is made out of what that can’t be broken down?
Elements!
The 3 elements that make matter are…?
Oxygen, carbon, and gold!
An Atom is…?
Absolute smallest piece of an element!
What is the dense core of an atom?
Nucleus
Protons (positive charge) sits WHERE in the nucleus?
The center
Where does the Neutrons (neutral/no charge) sit in the nucleus?
The Center
Electrons (negative charge) zip around the inside or outside in orbits?
OUTSIDE
What is the Periodic Table?
A chart of all the elements arranged by their atomic number!
What’s the second most common element in your body?
Carbon
Covalent Bonds Means?
strong chemical bond formed when two atoms share a pair of electrons!
Organic Molecule
A carbon based backbone and at least one C – H bond
Inorganic Molecule
Lacks a carbon based backbone and C – H bonds