2017 Science Bowl—Practice Questions
For Questions 1-5, choose which term best describes the change. For Questions 6-20, choose the best
term to describe the property or change.
1. When two solutions are mixed, their temperature increases.
a. Exothermic
b. Endothermic
2. A solid burns and releases heat and light.
a. Exothermic
b. Endothermic
3. When a solid is placed in a liquid, the temperature goes down.
a. Exothermic
b. Endothermic
4. If a reaction of two substances only happens when it is heated continually.
a. Exothermic
b. Endothermic
5. Plants take in energy for photosynthesis.
a. Exothermic
b. Endothermic
For Questions 6-20, choose the best term to describe the property or change.
6. Has a Blue Color
a. Chemical
b. Physical
7. Reacts with acid
a. Chemical
b. Physical
8. Gives off a sour odor
a. Chemical
b. Physical
9. Has a shiny surface
a. Chemical
b. Physical
10. Aluminum has a density of 2.7 g/cm3
a. Chemical
b. Physical
11. Silver spoons tarnish in air
a. Chemical
b. Physical
12. Calcium metal burns in air
a. Chemical
b. Physical
13. The block of wood has a volume of 13cm3
a. Chemical
b. Physical
14. A piece of notebook paper is torn into many pieces
a. Chemical
b. Physical
15. A liquid forms when a cold spoon is placed in the steam coming from boiling water
a. Chemical
b. Physical
16. A cut apple turns brown on the surface when left out in the air
a. Chemical
b. Physical
17. A tire is inflated
a. Chemical
b. Physical
18. Wood rots on the forest floor
a. Chemical
b. Physical
19. Sugar dissolves in hot coffee
a. Chemical
b. Physical
20. A marshmallow is roasted over a campfire and catches fire
a. Chemical
b. Physical
21. You blow dry your wet hair.
a. Chemical
b. Physical
22. Food coloring is dropped into water to change the color
a. Chemical
b. Physical
23. Fireworks explode in the sky on the 4th of July
a. Chemical
b. Physical
24. A cake rises when carbon dioxide is given off after mixing
a. Chemical
b. Physical
25. Ice cream melts in a dish on the counter
a. Chemical
b. Physical
26. Toasting bread in the oven turns the surface of the bread brown
a. Chemical
b. Physical
27. Which is a chemical change?
a. Baking a cake
b. Chopping up a tree
c. Heating a cup of tea
d. Drying clothes in a dryer
28. In a solution, the part that is present in the least amount is called the
a. Solute
b. Reactant
c. Product
d. Solvent
29. In another experiment a different student used a spirit burner to heat the same amount of
water to 10oC hotter than it started. Which fuel releases the most energy per gram?
Fuel
Mass of fuel used to raise temp of water by 10 oC
Methanol
3.6g
Ethanol
2.8g
Propanol
2.4g
Butanol
2.2g
Which fuel released the most energy per gram?
a. Butanol
b. Propanol
c. Ethanol
d. Methanol
30. When a solution is prepared by adding 10 grams of sugar to 30 grams of water, which term best
describe the final mixture?
a. Concentrated
b. Dilute
31. When 3 grams of salt are mixed with 150 grams of water, which term best describes the final
mixture?
a. Concentrated
b. Dilute
32. When 10 grams of sugar is added to 30 grams of water, which is the solute?
a. Sugar
b. Water
33. When 10 mL of alcohol is added to 100 mL of water, what is the solvent?
a. Alcohol
b. Water
c.
34. Increase in temperature always indicates a(an)
a. Exothermic change
b. Endothermic change
c. Chemical change
d. Physical change
35. In one experiment, 12.0 g of solute was placed in 100.0 mL of water with a density of 1.0 g/mL.
The solution was stirred until the solute dissolved in the solvent. What was the final mass of the
solution?
a. Slightly less than 112.0 g
b. Slightly more than 112.0 g
c. Exactly 112.0 g
d. No correct answer is given
2017 Science Bowl Practice Questions Answer Key
1. A
2. A
3. B
4. B
5. B
6. B
7. A
8. B
9. B
10.B
11.A
12.A
13.B
14.B
15.B
16.A
17.B
18.A
19.B
20.A
21.B
22.B
23.A
24.A
25.B
26.A
27.A
28.A
29.A
30.A
31.B
32.A
33.B
34.A
35.C