Biology HW3: Ch 2 Test Review- Eddie V

Substances are changed into different substances when bonds break and form during

• chemical equilibrium
• chemical reactions
• ion formation
• hydrogen bonding

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NGSS.HS-PS1-2

NGSS.HS-PS1-7

Atoms in molecules share pairs of electrons when they make

• ionic bonds
• covalent bonds
• hydrogen bonds
• polymers

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NGSS.HS-PS1-1

Which of the following is formed when an atom gains or loses electrons?

• element
• ion
• compound
• molecule

Both animal fats and plant oils are made up of glycerol and 

• phospholipids
• fatty acids
• polar molecules
• saturated fats

The smallest basic unit of matter is the 

• molecule
• atom
• compound
• cell

What gives water many properties that are important to living things?

• temperature
• hydrogen bonds
• density
• specific heat

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NGSS.HS-ESS2-5

Which of the following solutions has the highest H+ 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

The activation energy needed for a chemical reaction is decreased by a 

• catalyst
• reactant
• product
• substrate

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NGSS.HS-PS1-4

The four main types of carbon-based molecules in organisms are carbohydrates, lipids, nucleic acids, and 

• starches
• fatty acids
• monosaccharides
• proteins

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NGSS.HS-LS1-1

Electrons orbit the nucleus of an atom that is composed of these two other particles:

• Protons

• Neutrons

• Positrons

• Photons

Tags

NGSS.HS-PS1-8