A. WHO AM
I?
|
|
|
Choose among these lettered terms to answer the numbered riddles
below: A. | activation energy | I. | ion | B. | bond
energy | J. | molecule | C. | carbohydrate | K. | nucleic acid | D. | compound | L. | pH | E. | endothermic | M. | protein | F. | enzyme | N. | solution | G. | fatty acid | O. | substrate | H. | hydrogen
bond |
|
|
|
1.
|
I am a chemical reaction that absorbs more energy than
I release; my
products have a higher bond energy than my reactants.
|
|
|
2.
|
I am an attraction between a slightly positive hydrogen atom and a slightly
negative atom, such as oxygen or nitrogen.
|
|
|
3.
|
I am the type of molecule that stores
genetic information in living things; I include DNA and RNA.
|
|
|
4.
|
I am the amount of energy needed to break a
chemical bond; I am also the amount of energy released when a bond forms
|
|
|
5.
|
I am a certain type of mixture; I am formed when one substance, such as water,
dissolves other substances.
|
|
|
6.
|
I allow chemical reactions to take place under the tightly controlled
conditions in living things; in almost all cases I am a protein
|
|
|
7.
|
Chemical bonds hold me together; I always contain atoms of more than one
element.
|
|
|
8.
|
I am a carbon chain found in many lipids; I
can be
either saturated or unsaturated.
|
|
|
9.
|
I have a positive charge if I lose an electron, or I have
a negative charge
if I gain an electron.
|
|
|
10.
|
I am a reactant an enzyme acts on; I bind to an enzyme’s active
site.
|
|
|
11.
|
Many different types of me have many different
functions in living things;
I am made of amino acids.
|
|
|
12.
|
I measure the hydrogen ion concentration in a solution;
when I am low a
solution is very acidic.
|
|
|
13.
|
I am the amount of energy that is needed for a chemical reaction to start;
after I am added, the reaction can take place on its own
|
|
|
14.
|
I am held together by covalent bonds; I can be made of atoms of just one
element.
|
|
|
15.
|
Carbon, hydrogen, and oxygen are my building blocks; sometimes I am broken down
as a source of energy, and sometimes I make up plant cell walls
|
|
|
B. Same or
Different?
Each pair of words could either describe the same thing or different things. If
they can describe the same thing, choose the letter A for SAME. If they cannot describe the same
thing, choose the letter B for DIFFERENT.
|
|
|
16.
|
catalyst/enzyme
|
|
|
17.
|
atom/element
|
|
|
18.
|
cohesion/adhesion
|
|
|
19.
|
monomer/polymer
|
|
|
20.
|
exothermic/endothermic
|
|
|
21.
|
substrate/reactant
|
|
|
22.
|
solvent/solute
|
|
|
23.
|
compound/element
|
|
|
24.
|
acid/base
|
|
|
25.
|
enzyme/protein
|
C. Compound Word Puzzle:
Write the answer on the blank space provided. Wrong spelling
will be marked WRONG.
|
|
|
1.
|
enters a chemical reaction ____________________
|
|
|
2.
|
atom that has gained or lost electrons ______________________
|
|
|
3.
|
held together by covalent bonds ________________________
|
|
|
4.
|
dissolves a solute _______________________
|
|
|
5.
|
releases a hydrogen ion into a solution ______________________
|
|
|
6.
|
reactants have a greater bond energy than products ______________________
|
|
|
7.
|
substance that decreases activation energy ______________________
|
|
|
8.
|
includes sugars and starches ______________________
|
For D and E - Follow the instruction in each
number.
|
|
|
1.
|
Which word does not belong to the
group?
A. | base | B. | acid | C. | hydrogen
bond |
|
|
|
2.
|
Which word does not belong to the
group?
|
|
|
3.
|
Which word does not belong to the
group?
A. | solution | B. | covalent bond | C. | molecule |
|
|
|
4.
|
Which word does not belong to the
group?
A. | equilibroum | B. | bond energy | C. | exothermic |
|
|
|
5.
|
Choose the letter of the situation that most
closely relates to the vocabulary word.
activation energy
A. | eating sugary foods | B. | kickstarting a motorcycle |
|
|
|
6.
|
Choose the letter of the situation that most
closely relates to the vocabulary word.
solute
A. | answering a math problem | B. | getting lost in a crowd |
|
|
|
7.
|
Choose the letter of the situation that most
closely relates to the vocabulary word.
IONIC BOND
A. | passing a basketball | B. | linking hands in a human chain |
|
|
|
8.
|
Choose the letter of the situation that most
closely relates to the vocabulary word.
LIPID
A. | a car’s gas tank | B. | a car’s headlights |
|
|
|
9.
|
Choose the letter of the situation that most
closely relates to the vocabulary word.
AMINO ACID
A. | lemon juice in iced tea | B. | onr of msny beads on a string |
|
|
|
10.
|
Choose the letter of the situation that most
closely relates to the vocabulary word.
COVALENT BOND
A. | passing a basketball | B. | linking hands in a human chain |
|
|
|
11.
|
Choose the letter of the situation that most
closely relates to the vocabulary word.
EQUILIBRIUM
A. | evenly matched tug-of-war | B. | sprinters ready to race |
|
|
|
12.
|
Choose the letter of the situation that most
closely relates to the vocabulary word.
ATOM
A. | unicellular organism | B. | multicellular organism |
|