2021 Elementary Science Bowl - Practice Round Survey

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* 3. In a water molecule, how is the charge distributed?

Negative on the hydrogen side, positive on the oxygen side

Positive on the hydrogen side, negative on the oxygen side

There is no charge distribution in the water molecule

No correct answer

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* 4. What percentage of the world’s population doesn’t have access to clean water?

10%

17%

38%

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* 5. The human body is approximately what percentage water?

20%

40%

60%

85%

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* 6. What property of water allows it to bead up on waxy surfaces like car hoods and wax paper?

Capillary action

Universal solvency

Surface tension

Absorbency

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* 7. Which is NOT a use of water in the human body?

Transport

Temperature regulation

Energy source

Participate in chemical reactions

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* 8. What percent of the earth’s water is in the oceans?

10%

20%

70%

97%

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* 9. What percent of freshwater on the earth is used for irrigation?

25%

50%

70%

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* 10. How many people lack access to healthy, clean water?

100 million

750 million

1.5 billion

7 billion

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* 11. When we compare the amount of wetlands on the Earth in 1900 to what exists now, what percentage still exist as wetlands?

20%

50%

65%

80%

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* 12. What is the density of water?

0.5 g/mL

1.0 g/mL

1.5 g/mL

No correct answer

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* 13. What does adhesive mean?

Attractive

Repellent

Loose

Sticky

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* 14. In an aqueous solution, water is

The solute

The solvent

The substance found in the least amount

The best coagulant

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* 15. In a solution, the substance present in the greater amount is considered the

Solute

Most dense

Concentrate

Solvent

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* 16. Which of the following substances is soluble in water?

Gasoline

Rubbing alcohol

Cooking oil

Any fat, like bacon fat or lard

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* 17. Which of the following substances is NOT soluble in water?

Sugar

Salt

Rubbing alcohol

Sand

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* 18. Why is water called the universal solvent?

More substances dissolve in water than any other solvent

It is found in every living thing

It comprises 75% of the earth’s surface

Every substance dissolves in water

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* 19. If Virginia prepares a solution with 40.0 grams of sugar in 100 grams of water, how much sugar will she get back if she filters it?

None

15 grams

A little less than 40 grams

Exactly 40 grams

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* 20. If Jerry prepares a solution with 40.0 grams of sugar in 160 grams of water, and he evaporates all the water, how much sugar will he get back?

None

15 grams

A little less than 40 grams

Exactly 40 grams

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* 21. What is the percentage of hydrogen in a water molecule?

0.67%

11%

67%

89%

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* 22. How many grams of oxygen would be present in a 100 gram sample of water?

0.67g

11.0g

67 g

89 g

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* 23. Which of the following is an example of a chemical reaction of water?

Melting ice

Freezing water

Boiling water

None of the above

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* 24. Which of the following changes does not require energy?

Boiling water

Melting ice

Condensing steam

All of the above require energy

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* 25. A puddle of water and a glass of water both at the same temperature and volume are left to evaporate. Which evaporates sooner and why?

The puddle because of increased surface area

The puddle because of increased molecular motion

The glass because of decreased surface area

The glass because of increased molecular motion

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* 26. Marilyn saves 30% of the money she earns each month. If she earns $250 each month, how much does she save?

$75

$12

$120

$8.33

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* 27. There are 250 chairs in the gym. If 150 chairs are full, what percentage are full?

17%

56%

60%

166%

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* 28. Last year the cost of a football ticket was $25. This year the cost is $28. What is the percentage increase in price from last year to this year?

1.1%

10.7%

12%

89%

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* 29. Last year the football team won 15 games. This year the team won 20% fewer games. How many games did the team win this year?

No correct answer

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Use this image to answer the following question.

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* 30. What percentage of the images are sleds?

25%

30%

70%

75%

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* 31. Twenty-seven percent of the tomatoes in a garden are red. What fraction shows this percent?

27/1

27/10

27/100

27/1000

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* 32. If the decimal 0.047 is written as a percent it would be

0.0047%

0.47%

4.7%

47%

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* 1. My name is...

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* 2. ...and I am the coach for...

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* 3. In a water molecule, how is the charge distributed?

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* 4. What percentage of the world’s population doesn’t have access to clean water?

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* 5. The human body is approximately what percentage water?

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* 6. What property of water allows it to bead up on waxy surfaces like car hoods and wax paper?

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* 7. Which is NOT a use of water in the human body?

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* 8. What percent of the earth’s water is in the oceans?

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* 9. What percent of freshwater on the earth is used for irrigation?

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* 10. How many people lack access to healthy, clean water?

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* 11. When we compare the amount of wetlands on the Earth in 1900 to what exists now, what percentage still exist as wetlands?

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* 12. What is the density of water?

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* 13. What does adhesive mean?

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* 14. In an aqueous solution, water is

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* 15. In a solution, the substance present in the greater amount is considered the

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* 16. Which of the following substances is soluble in water?

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* 17. Which of the following substances is NOT soluble in water?

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* 18. Why is water called the universal solvent?

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* 19. If Virginia prepares a solution with 40.0 grams of sugar in 100 grams of water, how much sugar will she get back if she filters it?

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* 20. If Jerry prepares a solution with 40.0 grams of sugar in 160 grams of water, and he evaporates all the water, how much sugar will he get back?

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* 21. What is the percentage of hydrogen in a water molecule?

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* 22. How many grams of oxygen would be present in a 100 gram sample of water?

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* 23. Which of the following is an example of a chemical reaction of water?

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* 24. Which of the following changes does not require energy?

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* 25. A puddle of water and a glass of water both at the same temperature and volume are left to evaporate. Which evaporates sooner and why?

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* 26. Marilyn saves 30% of the money she earns each month. If she earns $250 each month, how much does she save?

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* 27. There are 250 chairs in the gym. If 150 chairs are full, what percentage are full?

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* 28. Last year the cost of a football ticket was $25. This year the cost is $28. What is the percentage increase in price from last year to this year?

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* 29. Last year the football team won 15 games. This year the team won 20% fewer games. How many games did the team win this year?

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Use this image to answer the following question.

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* 30. What percentage of the images are sleds?

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* 31. Twenty-seven percent of the tomatoes in a garden are red. What fraction shows this percent?

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* 32. If the decimal 0.047 is written as a percent it would be

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* 33. I am the coach for...