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- 1. Multiple Choice
When is an ionic bond formed?
when electrons are shared
when protons are shared
when oppositely charged atoms gain or lose electrons
when oppositely charged atoms gain or lose a proton
- 2. Multiple Choice
What makes carbon so important to life?
bonding properties
its place on the Periodic Table
it is a reactant in all chemical reactions
it is an enzyme
- 3. Multiple Choice
What gives water so many important properties for life?
adhesion and cohesion
the amount of carbon in each molecule
energy released exothermically
hydrogen bonds give it polarity
- 4. Multiple Choice
What makes a chemical reaction?
matter is conserved
breaking and forming of chemical bonds
when products form reactants
when you do a lab
- 5. Multiple Choice
What are the smallest basic units of matter?
molecules
atoms
elements
7th graders
- 6. Multiple Choice
Exothermic reactions
absorb more energy than they release
are cold
do not use bond energy for activation
release more energy than they absorb
- 7. Multiple Choice
Which of the following solutions has the highest Hydrogen ion concentration?
a solution with a pH of 1
a solution with a pH of 4
a solution with a pH of 7
a solution with a pH of 10
- 8. Multiple Choice
A catalyzed reaction
increases the products made
uses less activation energy to get started
has a slower reaction rate
uses more reactants throughout the reaction
- 9. Multiple Choice
Enzymes act on
products
proteins
amino acids
substrates
- 10. Multiple Choice
Atoms that share electrons are
in a covalent bond
in an ionic bond
are usually salts
always metals
- 11. Multiple Choice
What are the reactants in this chemical equation?
CH4 and 2O2
carbon and oxygen
CO2 and 2 H2O
water and methane
- 12. Multiple Choice
Activation energy
is the term for the amount of energy in each reactant
helps the enzyme to increase the rate of the reaction
is the term for the amount of energy that needs to be added for a chemical reaction to start
is the term for the amount of energy released by the reaction after it starts
- 13. Multiple Choice
What are the 4 types of carbon-based molecules in organisms?
carbohydrates, lipids, fatty acids, and monomers
polymers, monomers, acids, bases
adhesion, cohesion, evaporative cooling, and high specific heat
nucleic acids, proteins, lipids, and carbohydrates
- 14. Multiple Choice
What are proteins made of?
amino acids
monosaccharides
nucleic acids
fatty acids
- 15. Multiple Choice
Which carbon-based molecule includes sugar and starches?
carbohydrates
lipids
proteins
nucleic acids
- 16. Multiple Choice
What is the primary function of DNA?
to make nucleic acids
long term energy storage
store genetic information
to function as RNA
- 17. Multiple Choice
What are the products in this chemical reaction?
calcium and oxygen
Ca and CaO
2Ca and O2
2CaO
- 18. Multiple Choice
What is happening in this picture?
an enzyme is binding a substrate together to form a product
an enzyme is breaking down a substrate to release new products
the active site of the enzyme does not fit the substrate
a change in pH has damaged the enzyme
- 19. Multiple Choice
The building blocks of most living things contain the element
carbon
nitrogen
calcium
sodium
- 20. Multiple Choice
Changes in the pH, temperature, enzyme concentration, and/or substrate concentration can negatively affect
the activation energy of chemical reactions
the bond energy released by reactants in a reaction
the efficient function of an enzyme or catalyzed reaction
the polarity of water used for evaporative cooling
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