A water molecule is made up of :

Two atoms of hydrogen and one atom of oxygen

One atom of hydrogen and one atom of oxygen

One atom of sodium and one atom of chlorine

One atom of hydrogen and two atoms of oxygen

Water molecules are polar, with the .....

Oxygen side being slightly negative and the Hydrogen side being slightly positive

Oxygen side being slightly positive and hydrogen side being slightly negative

Oxygen and hydrogen sides being slightly positive

Oxygen and hydrogen sides being slightly negative

A water strider is an insect that can stand and move on the waters surface. This happens because of :

Hydrogen bonds in Water Molecules

Which statement best describes an effect of the low density of frozen water in a lake?

When water in a lake freezes, it floats, providing insulation for organisms below

Water removes thermal energy from the land around the lake, causing the lake to freeze

When water freezes, it contracts, decreasing the water level in a lake

Water in a lake freezes from the bottom up, kiling most aquatic organisms

Water helps maintain homeostasis in an organism, which of the following hold true to that ?

Its ability to dissolve substances

Its ability to be a polar molecule and have a pH of 7

A leaf gently floats on a pond. Which of the following statements best explains why the leaf stays on top of the water ?

The water molecules are held together by hydrogen bonding

The hydrogen and oxygen atoms in the water are held together by ionic bonds

The density of the leaf is greater than the density of the water

The leaf has non nonpolar covalent bonds between its atoms

Which combination when referring to saltwater is correct in terms of solutes/solvents ?

Solute : Table Salt ; Solvent : Water

Solute : Table Salt ; Solvent : Salt Water

Solute : Water ; Solvent : Table Salt

Solute : Saltwater ; Solvent : Water

The pH indicates the concentration of H+ ions in a solution. The scales range from 0-14. Which of the following shows the correct pairing of on the scale ?

Bases - pH values above 7; Acids - values below 7 ; Neutral - pH values at 7

Bases - pH values above 7; Acids - pH values at 7 ; Neutral - pH values below 7

Acids - pH values above 7; Bases - pH values below 7 ; Neutral - pH values at 7

Characteristics of carbon that contribute to its ability to form an immense diversity of organic molecules include its:

Tendency to form covalent bonds with carbon and other elements

Ability to bond with up to four other atoms

Capacity to form single, double, or triple bonds

Which of the following does NOT describe a polymer ?

Polymers are smaller than monomers

Polymers are made up of monomers

Polymers are very large molecules

Polymers can be formed through dehydration synthesis by removing a water molecule

Carbohydrates and Proteins are two types of macromolecules. Which functional characteristic of proteins distinguishes them from carbohydrates ?

Ability to catalyze biochemical reactions

Large amount of stored information

Efficient Storage of Usable Chemical Energy

Tendency to make cell membranes hydrophobic

All of the following are important about nucleic acids except :

Contain enzymes to break down molecules

Store and Transmit Genetic Information

Essential for all cell's activities to occur

Pass information from parent to offspring

Which of the following are true about carbohydrates ?

Starches and sugar are examples of carbohydrates

Plants and some animals use them for strength/rigidity

Living things use them for their MAIN source of energy

Which of the following is NOT a function of lipids ?

Part of the plasma cell membrane

Which of the following statements is true about catalysts ?

Catalysts lower the activation energy of a chemical reaction

Catalysts slow down the rate of chemical reactions

Catalysts are used up during a chemical reaction

Chapter 2: The Chemistry of Life

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Hard

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NGSS

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Matthew Austin

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46 questions

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MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The space surrounding the nucleus of an atom contains:

Protons

Electrons

Ions

Neutrons

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The three particles that make up an atom are:

Positives, Negatives, and Electrons

Protons, Neutrons, and Isotopes

Protons and Electrons

Protons, Neutrons, and Electrons

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The nucleus of an atom is comprised of:

Protons and Neutrons

Electrons and Neutrons

Protons and Electrons

Protons, Neutrons, and Electrons

If an atom contains 9 protons, 12 neutrons, and 9 electrons:

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

If an atom contains 13 protons and 14 neutrons, its atomic number is:

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Isotopes are atoms of the same elements with the same number of protons and ....

a different number of electrons

a different number of molecules

a different number of neutrons

the same number of neutrons

Which of the following is a use of radioactive isotopes ?

Can determine the ages of rocks and fossils

Can be used to treat cancer and kill bacteria that causes food to spoil

Used as "tracers" to follow the movements of substances within organisms

All of the above

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Chapter 2: The Chemistry of Life

46 questions

The space surrounding the nucleus of an atom contains:

The three particles that make up an atom are:

The nucleus of an atom is comprised of:

If an atom contains 9 protons, 12 neutrons, and 9 electrons:

If an atom contains 13 protons and 14 neutrons, its atomic number is:

Isotopes are atoms of the same elements with the same number of protons and ....

Which of the following is a use of radioactive isotopes ?

What type of electron is available to form bonds ?

What type of ion forms when an atom loses electrons ?

A covalent bond is formed as a result of...

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