TCI Science

Carbon is unique due to the carbon atom's

• bonding properties
• six outer unpaired electrons
• ionic compounds
• hydrogen bonding strength

Which category of carbon-based molecules includes sugars and starches?

• unsaturated fatty acids
• phospholipids
• proteins
• carbohydrates

Fats, oils, and cholesterols are all types of 

• cell membranes
• hormones
• lipids
• fatty acids

Proteins are composed of which molecules?

• amino acids
• fatty acids
• monosaccharides
• nucleic acid

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NGSS.HS-LS1-1

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DNA  and RNA  are two types of 

• proteins
• nucleic acid
• lipids
• carbohydrates

Chemical reactions change substances into different substances by

• conserving matter between the substances
• breaking and forming chemical bonds
• strengthening electrical charges of substances
• changing a solvent into a solute

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NGSS.HS-PS1-5

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Identify the reactants in the following chemical reaction: 6H 2O+6C O2 --> C6 H12 O6+6O2

• 6H 2O and 6C O2
• 6CO2 and C6H12O6
• 6H2O, C6H12O6 and 6O2
• C6H12O2 and 6O2

The double arrows tell you that the following reaction CO2+H2O            CO2CO3

• takes place very rapidly 
• is very unstable
• occurs in both directions
• has high bond energies

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NGSS.HS-PS1-6

What is the term for the amount of energy that needs to b added for a chemical reaction to start?

• chemical energy
• activation energy
• bond energy
• reactant energy

Which phrase best describes an exothermic reaction?

• does not absorb any energy
• forms products with higher bond energy than reactants
• in is a state of equilibrium
• released more energy than it absorbs

Tags

NGSS.HS-PS1-4