Quiz: Water & Reactions Quiz


Water & Reactions QuizOnline version Water & Reactions by Sacred Cat 1 1. Why is water considered a polar molecule? a D. It contains only one type of atom. b A. It has an equal distribution of charge. c B. Its electrons are shared equally between all atoms. d C. It has an uneven distribution of electrical charge. 2 2. Which atoms make up a water molecule? a C. Two oxygen atoms and one hydrogen atom b A. One carbon and two oxygen atoms c B. Two hydrogen atoms and one oxygen atom d D. One hydrogen and one oxygen atom 3 3. What type of bond holds the hydrogen and oxygen atoms together within a water molecule? a A. Ionic bond b B. Hydrogen bond c C. Covalent bond d D. Peptide bond 4 4. What causes water molecules to form hydrogen bonds with one another? a C. Water molecules sharing electrons between different molecules b A. The partial charges created by water's polarity c B. The presence of carbon atoms d D. Water having no electrical charges 5 5. Which property of water allows it to stick to other water molecules? a D. Density b B. Cohesion c C. Solubility d A. Adhesion 6 6. What is adhesion? a B. The attraction between water and other substances b C. The breaking of chemical bonds by water c D. The movement of water through a membrane d A. The attraction between water molecules 7 7. Which example demonstrates cohesion? a B. Water moving upward through a plant b A. Water sticking to the sides of a glass c C. Water molecules sticking to each other d D. Salt dissolving in water 8 8. Which property of water helps insects walk across the surface of water? a A. Surface tension b C. Solubility c D. Neutrality d B. Low density 9 9. Why does water have relatively high surface tension? a D. Water cannot form hydrogen bonds. b C. Water is nonpolar. c A. Water molecules are held together by cohesive forces. d B. Water molecules contain carbon. 10 10. Why is water an effective solvent for many substances? a A. Its polarity allows it to interact with many charged and polar substances. b C. It contains no electrical charges. c D. It can dissolve every substance. d B. It is completely nonpolar. 11 11. What is a solute? a D. A type of chemical bond b B. The substance being dissolved c A. The substance that does the dissolving d C. The container holding a solution 12 12. What is a solvent? a D. A type of macromolecule b A. The substance that is dissolved c C. The product of a chemical reaction d B. The substance that dissolves the solute 13 13. In salt water, which substance is the solvent? a A. Salt b B. Sodium c C. Water d D. Chloride 14 14. What happens when table salt dissolves in water? a D. The atoms of salt disappear. b A. The water molecules surround and separate the ions. c C. The water turns into salt. d B. The salt becomes a new element. 15 15. Why does ice float on liquid water? a D. Solid water is always heavier than liquid water. b A. Ice is less dense because hydrogen bonding creates a more open structure. c B. Ice contains less oxygen. d C. Ice has no hydrogen bonds. 16 16. Why is water's high specific heat important to living organisms? a C. Water immediately boils when heated. b B. Water cannot absorb heat. c D. Water always remains at exactly 0°C. d A. Water can absorb considerable heat with relatively little change in temperature. 17 17. How does water's high specific heat help organisms maintain stable temperatures? a B. It causes water to freeze instantly. b A. It allows water to resist rapid temperature changes. c D. It makes water nonpolar. d C. It prevents water from forming hydrogen bonds. 18 18. Which property of water helps plants transport water through narrow tubes? a C. Nonpolarity b A. Cohesion and adhesion c D. Low surface tension d B. Low specific heat 19 19. Which statement about water and hydrogen bonds is correct? a C. Hydrogen bonds only occur inside DNA. b B. Hydrogen bonds are stronger than all covalent bonds. c D. Water cannot form hydrogen bonds. d A. Hydrogen bonds are attractions between partially charged regions of different molecules. 20 20. Why is water important to living organisms? a A. It participates in chemical reactions and provides an environment in which many biological reactions occur. b B. It is only used for temperature regulation. c C. It is only found outside cells. d D. It prevents chemical reactions from occurring. 21 21. What is a chemical reaction? a C. The movement of water through a membrane b D. The physical mixing of two substances without any molecular changes c A. A process in which atoms are rearranged to form new substances d B. A process in which atoms disappear 22 22. What are the substances present before a chemical reaction called? a B. Reactants b C. Catalysts c D. Solvents d A. Products 23 23. What are the substances produced by a chemical reaction called? a C. Products b A. Reactants c B. Substrates d D. Solutes 24 24. Which statement represents the basic idea behind conservation of matter in a chemical reaction? a B. Atoms disappear when products form. b C. New atoms are created during every reaction. c A. Atoms are rearranged but are not created or destroyed. d D. Matter is destroyed when bonds break. 25 25. What happens to chemical bonds during a chemical reaction? a A. Bonds can be broken and new bonds can form. b B. Bonds never change. c C. All bonds are permanently destroyed. d D. Only hydrogen bonds can change. 26 26. Which equation correctly identifies the reactants? a A. Carbon dioxide and water b D. Glucose and water c B. Glucose and oxygen d C. Oxygen and carbon dioxide 27 27. In the reaction below, which substances are the products? a A. Glucose and oxygen b D. Glucose and carbon dioxide c B. Oxygen and water d C. Carbon dioxide and water 28 28. What is activation energy? a B. The energy stored in DNA b C. The energy released by every reaction c D. The energy contained only in water d A. The minimum amount of energy needed to start a chemical reaction 29 29. How does a catalyst affect a chemical reaction? a D. It prevents the reaction from occurring. b A. It lowers the activation energy needed for the reaction. c B. It becomes the main product. d C. It increases the amount of matter present. 30 30. Which biological molecule commonly acts as a catalyst? a A. Enzyme b D. DNA c C. Carbohydrate d B. Lipid 31 31. What happens to an enzyme after it catalyzes a reaction? a A. It is generally not permanently consumed and can be used again. b D. It becomes a carbohydrate. c C. It is always destroyed. d B. It becomes the product. 32 32. Which statement best describes an exergonic reaction? a B. It always requires sunlight. b C. It cannot occur in cells. c A. It releases energy. d D. It creates matter. 33 33. Which statement best describes an endergonic reaction? a D. It cannot occur in living organisms. b C. It destroys matter. c B. It always releases energy. d A. It requires an input of energy. 34 34. Which type of reaction joins smaller molecules to make a larger molecule while releasing water? a C. Combustion b B. Dehydration synthesis c D. Neutralization d A. Hydrolysis 35 35. Which type of reaction uses water to break a larger molecule into smaller molecules? a C. Photosynthesis b D. Condensation only c A. Dehydration synthesis d B. Hydrolysis 36 36. Why is water important in hydrolysis reactions? a D. Water provides all the carbon atoms in the products. b C. Water becomes an enzyme. c A. Water participates in breaking chemical bonds within larger molecules. d B. Water prevents all bonds from breaking. 37 37. A cell combines two smaller molecules and releases water. Which process is occurring? a B. Dehydration synthesis b D. Denaturation c C. Diffusion d A. Hydrolysis 38 38. A large molecule is broken into smaller molecules when water is added. Which process is occurring? a D. Adhesion b C. Cohesion c B. Hydrolysis d A. Dehydration synthesis 39 39. Why are chemical reactions essential to living organisms? a A. They allow cells to build molecules, break molecules down, release energy, and carry out necessary life processes. b B. They only occur when an organism is outside the body. c D. They destroy all of the cell's molecules. d C. They prevent cells from changing. 40 40. Which statement best connects water and chemical reactions in living organisms? a B. Water prevents chemical reactions from occurring in cells. b A. Water can participate in reactions and its properties provide an environment that allows many biological reactions to occur. c C. Water is only important because it makes cells heavier. d D. Water cannot interact with biological molecules.

1

1. Why is water considered a polar molecule?

a

D. It contains only one type of atom.

b

A. It has an equal distribution of charge.

c

B. Its electrons are shared equally between all atoms.

d

C. It has an uneven distribution of electrical charge.

2

2. Which atoms make up a water molecule?

a

C. Two oxygen atoms and one hydrogen atom

b

A. One carbon and two oxygen atoms

c

B. Two hydrogen atoms and one oxygen atom

d

D. One hydrogen and one oxygen atom

3

3. What type of bond holds the hydrogen and oxygen atoms together within a water molecule?

a

A. Ionic bond

b

B. Hydrogen bond

c

C. Covalent bond

d

D. Peptide bond

4

4. What causes water molecules to form hydrogen bonds with one another?

a

C. Water molecules sharing electrons between different molecules

b

A. The partial charges created by water's polarity

c

B. The presence of carbon atoms

d

D. Water having no electrical charges

5

5. Which property of water allows it to stick to other water molecules?

a

D. Density

b

B. Cohesion

c

C. Solubility

d

A. Adhesion

6

6. What is adhesion?

a

B. The attraction between water and other substances

b

C. The breaking of chemical bonds by water

c

D. The movement of water through a membrane

d

A. The attraction between water molecules

7

7. Which example demonstrates cohesion?

a

B. Water moving upward through a plant

b

A. Water sticking to the sides of a glass

c

C. Water molecules sticking to each other

d

D. Salt dissolving in water

8

8. Which property of water helps insects walk across the surface of water?

a

A. Surface tension

b

C. Solubility

c

D. Neutrality

d

B. Low density

9

9. Why does water have relatively high surface tension?

a

D. Water cannot form hydrogen bonds.

b

C. Water is nonpolar.

c

A. Water molecules are held together by cohesive forces.

d

B. Water molecules contain carbon.

10

10. Why is water an effective solvent for many substances?

a

A. Its polarity allows it to interact with many charged and polar substances.

b

C. It contains no electrical charges.

c

D. It can dissolve every substance.

d

B. It is completely nonpolar.

11

11. What is a solute?

a

D. A type of chemical bond

b

B. The substance being dissolved

c

A. The substance that does the dissolving

d

C. The container holding a solution

12

12. What is a solvent?

a

D. A type of macromolecule

b

A. The substance that is dissolved

c

C. The product of a chemical reaction

d

B. The substance that dissolves the solute

13

13. In salt water, which substance is the solvent?

a

A. Salt

b

B. Sodium

c

C. Water

d

D. Chloride

14

14. What happens when table salt dissolves in water?

a

D. The atoms of salt disappear.

b

A. The water molecules surround and separate the ions.

c

C. The water turns into salt.

d

B. The salt becomes a new element.

15

15. Why does ice float on liquid water?

a

D. Solid water is always heavier than liquid water.

b

A. Ice is less dense because hydrogen bonding creates a more open structure.

c

B. Ice contains less oxygen.

d

C. Ice has no hydrogen bonds.

16

16. Why is water's high specific heat important to living organisms?

a

C. Water immediately boils when heated.

b

B. Water cannot absorb heat.

c

D. Water always remains at exactly 0°C.

d

A. Water can absorb considerable heat with relatively little change in temperature.

17

17. How does water's high specific heat help organisms maintain stable temperatures?

a

B. It causes water to freeze instantly.

b

A. It allows water to resist rapid temperature changes.

c

D. It makes water nonpolar.

d

C. It prevents water from forming hydrogen bonds.

18

**18. Which property of water helps plants transport water through narrow tubes?

a

C. Nonpolarity

b

A. Cohesion and adhesion

c

D. Low surface tension

d

B. Low specific heat

19

**19. Which statement about water and hydrogen bonds is correct?

a

C. Hydrogen bonds only occur inside DNA.

b

B. Hydrogen bonds are stronger than all covalent bonds.

c

D. Water cannot form hydrogen bonds.

d

A. Hydrogen bonds are attractions between partially charged regions of different molecules.

20

**20. Why is water important to living organisms?

a

A. It participates in chemical reactions and provides an environment in which many biological reactions occur.

b

B. It is only used for temperature regulation.

c

C. It is only found outside cells.

d

D. It prevents chemical reactions from occurring.

21

21. What is a chemical reaction?

a

C. The movement of water through a membrane

b

D. The physical mixing of two substances without any molecular changes

c

A. A process in which atoms are rearranged to form new substances

d

B. A process in which atoms disappear

22

22. What are the substances present before a chemical reaction called?

a

B. Reactants

b

C. Catalysts

c

D. Solvents

d

A. Products

23

23. What are the substances produced by a chemical reaction called?

a

C. Products

b

A. Reactants

c

B. Substrates

d

D. Solutes

24

24. Which statement represents the basic idea behind conservation of matter in a chemical reaction?

a

B. Atoms disappear when products form.

b

C. New atoms are created during every reaction.

c

A. Atoms are rearranged but are not created or destroyed.

d

D. Matter is destroyed when bonds break.

25

25. What happens to chemical bonds during a chemical reaction?

a

A. Bonds can be broken and new bonds can form.

b

B. Bonds never change.

c

C. All bonds are permanently destroyed.

d

D. Only hydrogen bonds can change.

26

26. Which equation correctly identifies the reactants?

a

A. Carbon dioxide and water

b

D. Glucose and water

c

B. Glucose and oxygen

d

C. Oxygen and carbon dioxide

27

27. In the reaction below, which substances are the products?

a

A. Glucose and oxygen

b

D. Glucose and carbon dioxide

c

B. Oxygen and water

d

C. Carbon dioxide and water

28

28. What is activation energy?

a

B. The energy stored in DNA

b

C. The energy released by every reaction

c

D. The energy contained only in water

d

A. The minimum amount of energy needed to start a chemical reaction

29

29. How does a catalyst affect a chemical reaction?

a

D. It prevents the reaction from occurring.

b

A. It lowers the activation energy needed for the reaction.

c

B. It becomes the main product.

d

C. It increases the amount of matter present.

30

**30. Which biological molecule commonly acts as a catalyst?

a

A. Enzyme

b

D. DNA

c

C. Carbohydrate

d

B. Lipid

31

**31. What happens to an enzyme after it catalyzes a reaction?

a

A. It is generally not permanently consumed and can be used again.

b

D. It becomes a carbohydrate.

c

C. It is always destroyed.

d

B. It becomes the product.

32

**32. Which statement best describes an exergonic reaction?

a

B. It always requires sunlight.

b

C. It cannot occur in cells.

c

A. It releases energy.

d

D. It creates matter.

33

**33. Which statement best describes an endergonic reaction?

a

D. It cannot occur in living organisms.

b

C. It destroys matter.

c

B. It always releases energy.

d

A. It requires an input of energy.

34

**34. Which type of reaction joins smaller molecules to make a larger molecule while releasing water?

a

C. Combustion

b

B. Dehydration synthesis

c

D. Neutralization

d

A. Hydrolysis

35

**35. Which type of reaction uses water to break a larger molecule into smaller molecules?

a

C. Photosynthesis

b

D. Condensation only

c

A. Dehydration synthesis

d

B. Hydrolysis

36

**36. Why is water important in hydrolysis reactions?

a

D. Water provides all the carbon atoms in the products.

b

C. Water becomes an enzyme.

c

A. Water participates in breaking chemical bonds within larger molecules.

d

B. Water prevents all bonds from breaking.

37

**37. A cell combines two smaller molecules and releases water. Which process is occurring?

a

B. Dehydration synthesis

b

D. Denaturation

c

C. Diffusion

d

A. Hydrolysis

38

**38. A large molecule is broken into smaller molecules when water is added. Which process is occurring?

a

D. Adhesion

b

C. Cohesion

c

B. Hydrolysis

d

A. Dehydration synthesis

39

**39. Why are chemical reactions essential to living organisms?

a

A. They allow cells to build molecules, break molecules down, release energy, and carry out necessary life processes.

b

B. They only occur when an organism is outside the body.

c

D. They destroy all of the cell's molecules.

d

C. They prevent cells from changing.

40

**40. Which statement best connects water and chemical reactions in living organisms?

a

B. Water prevents chemical reactions from occurring in cells.

b

A. Water can participate in reactions and its properties provide an environment that allows many biological reactions to occur.

c

C. Water is only important because it makes cells heavier.

d

D. Water cannot interact with biological molecules.

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Water & Reactions Quiz

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Water & Reactions QuizOnline version

by Sacred Cat

1. Why is water considered a polar molecule?

2. Which atoms make up a water molecule?

3. What type of bond holds the hydrogen and oxygen atoms together within a water molecule?

4. What causes water molecules to form hydrogen bonds with one another?

5. Which property of water allows it to stick to other water molecules?

6. What is adhesion?

7. Which example demonstrates cohesion?

8. Which property of water helps insects walk across the surface of water?

9. Why does water have relatively high surface tension?

10. Why is water an effective solvent for many substances?

11. What is a solute?

12. What is a solvent?

13. In salt water, which substance is the solvent?

14. What happens when table salt dissolves in water?

15. Why does ice float on liquid water?

16. Why is water's high specific heat important to living organisms?

17. How does water's high specific heat help organisms maintain stable temperatures?

**18. Which property of water helps plants transport water through narrow tubes?

**19. Which statement about water and hydrogen bonds is correct?

**20. Why is water important to living organisms?

21. What is a chemical reaction?

22. What are the substances present before a chemical reaction called?

23. What are the substances produced by a chemical reaction called?

24. Which statement represents the basic idea behind conservation of matter in a chemical reaction?

25. What happens to chemical bonds during a chemical reaction?

26. Which equation correctly identifies the reactants?

27. In the reaction below, which substances are the products?

28. What is activation energy?

29. How does a catalyst affect a chemical reaction?

**30. Which biological molecule commonly acts as a catalyst?

**31. What happens to an enzyme after it catalyzes a reaction?

**32. Which statement best describes an exergonic reaction?

**33. Which statement best describes an endergonic reaction?

**34. Which type of reaction joins smaller molecules to make a larger molecule while releasing water?

**35. Which type of reaction uses water to break a larger molecule into smaller molecules?

**36. Why is water important in hydrolysis reactions?

**37. A cell combines two smaller molecules and releases water. Which process is occurring?

**38. A large molecule is broken into smaller molecules when water is added. Which process is occurring?

**39. Why are chemical reactions essential to living organisms?

**40. Which statement best connects water and chemical reactions in living organisms?