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TEKS
TEKS
6.5a: know that an element is a pure substance represented by a chemical symbol and that a compound is a pure substance represented by a chemical formula
6.5b: recognize that a limited number of the many known elements comprise the largest portion of solid Earth, living matter, oceans, and the atmosphere
VOCABULARY
VOCABULARY
Chemical change – the formation of a new substance with different properties; cannot be undone by physical means
Chemical Formula - a set of symbols that describe the number and kind of elements in a compound (NaCl)
Chemical Reaction – a change caused by the interaction of two or more substances resulting in the formation of new substances
Chemical Symbol - a one- or two-letter abbreviation for an element's name (O - oxygen & Fe - Iron)
Compound - a substances whose molecules contain atoms from different elements
Element - a substance composed of atoms having an identical number of protons in each nucleus
Matter - anything that has mass and takes up space
Molecule - a particle of matter made up of two or atoms joined tightly together
Physical change – change which alters the physical properties of a substance without changing its identity
Precipitate – the solid that is formed as a result of a precipitation reaction
GUIDING QUESTIONS:
GUIDING QUESTIONS:
What is an element?
What is an atom?
What is a compound?
How are elements represented on the Periodic Table of Elements?
Which elements are the primary components of the lithosphere?
Which elements are the primary components of the biosphere?
Which elements are the primary components of the hydrosphere?
Which elements are the primary components of the atmosphere?
IMPORTANT LINKS:
IMPORTANT LINKS:
ELEMENTS VIDEOS:
ELEMENTS VIDEOS:
SAMPLE OF PAST JOURNAL ENTRIES - UNIT 1
SAMPLE OF PAST JOURNAL ENTRIES - UNIT 1
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