Chemistry of life many quiz

Match the following terms with their definitions:

• Cell

• Anything that has mass and occupies space

• Atom

• A group of atoms bonded together

• Molecule

• Most basic unit of life

• Matter

• Smallest part of an element

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What is the most basic unit of life?

• Atom

• Cell

• Molecule

• Organism

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Water is a molecule made of 2 atoms of hydrogen covalently bonded to 1 atom of (a)   .

• Carbon

• Oxygen

• Nitrogen

• Helium

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What is a characteristic of a polar molecule?

• Equal distribution of charges

• Unequal distribution of charges

• No charges

• Dissolves in oil.

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Water is less dense as a (a)   .

• Liquid

• Gas

• Solid

• Plasma

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Water is a (a)   solvent.

• Poor

• Average

• Terrific

• Weak

Water molecules sticking to each other is known as (a)   . A) Cohesion B) Adhesion C) High specific heat D) Less dense as a solid.

• Cohesion

• Adhesion

• High specific heat

• Less dense as a solid

The property of water that allows it to dissolve many substances is called (a)   .

• Cohesion

• Adhesion

• High specific heat

• Terrific solvent

Which of the following is an example of adhesion?

• Water droplets on a leaf

• Meniscus forming on a graduated cylinder

• Oil floating on water

• Ice melting

What ecological benefit does the floating of ice provide?

• It allows fish to swim above the ice

• It provides a habitat for penguins

• It enables life to exist under frozen surfaces

• It prevents water from freezing.

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