SCIENCE TAKS REVIEW

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SCIENCE TAKS REVIEW

• October 26-30

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TAKS ITEMS

• TAKS Objective 1
• The student will describe functional
  relationships in a variety of ways.
• Correct Response
• The student describes independent and dependent
  quantities in a functional relationship.

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TAKS ITEMS
TAKS Objective 3 8.9 Scientific concepts. The
student knows that substances have chemical and
physical properties.  Correct Response (D) In
the parentheses oxygen has 3 atoms as a subscript
and in the exterior there is a 3 as well.
Multiplying 3X39 Did you now know how many atoms
nitrogen has? Nitrogen has 3 atoms because the 3
in the exterior pertains to it as well.
C3H5(NO3)3  is an interesting, multi-purpose
chemical compound. Nitroglycerin, also called
nitro, is a heavy, colorless, poisonous, oily
explosive. As a prescribed drug, it helps relax
and dilate blood vessels and is often used in
treating chest pain. It is also used in the
manufacture of explosives, specifically dynamite,
and is frequently used in construction and
demolition projects. How many atoms of oxygen are
in a molecule of nitroglycerin?A. 1 B. 3 C. 6
D. 9
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TAKS ITEMS
TAKS Objective 3 8.9 Scientific concepts. The
student knows that substances have chemical and
physical properties.  Correct Response (C) You
might feel overwhelmed with the word sodium
polyacrylate it does tell what it means. Its a
polymer that can absorb a lot of water. Remember
to use RUBIES!!
Sodium polyacrylate is a polymer that can absorb
several hundred times its weight in water. Which
of the following products is MOST LIKELY to
contain this polymer?A. dish detergent B.
power boat hulls C. disposable diapers D. lawn
fertilizer
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TAKS ITEMS

• TAKS Objective 3
• 8.9 Scientific concepts. The student knows that
  substances have chemical and physical properties.
•  
• Correct Response
• Signs of a Chemical Reaction1. Color Change(can
  also be light production)2. Property Change
  (changes to something new) 3. Energy
  Change(endo-exo- thermic) 4. Precipitate
  (stuff left over like Hocoque)5. Gas Production
  (makes bubbles)

A student placed 2 grams of baking soda in a
balloon and 100 mL of vinegar in an Erlenmeyer
flask. After stretching the opening of the
balloon across the neck of the flask, the student
raised it to dump the baking soda into the flask.
He immediately observed foaming bubbles in the
flask and the balloon began to expand. The
student concluded thatA. a physical change
only was occurring B. the bubbles indicated a
chemical change was occurring C. the baking soda
and vinegar were products of a chemical reaction
D. the gas was oxygen
Write this down Its good for me, yum.
____________
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TAKS ITEMS
TAKS Objective 3 8.8 Describe atomic structure
and their parts Correct Response (D) This
represents the nucleus of an atom where protons
and neutrons are found. This is also where the
atomic mass of an atom is found. pn atomic
mass Did you know? Electrons are way way way
smaller than protons and neutrons, in fact they
only make up 1/1836 of the mass of an atom. Try
making 1/1836 into a fraction!!
If the dartboard above is used to model
an atom, which dart indicates where the
protons and neutrons are located? A. Dart W B.
Dart X C. Dart Y D. Dart Z