test in science 10

1. CAA National High School-Annex
Las Pinas City
Unit Test in Grade 10 Science
Name : ________________________
Gr. & Sec. _____________________
Direction : Write the letter of the correct answer.
1. Which example has particles that can be drawn closer to occupy smaller
volume?
a. fruit juice c. air inside the syringe
b. block of wood d. ice cube
2. Which of the following phenomena does NOT involve the application of gas
pressure?
a. burning fuels c. vulcanizing tire
b. falling leaves d. rising hot air balloons
3. Last summer vacation, the Cruz family decided to go to Pagudpod, Ilocos Norte
to have a beach party. On their way to Ilocos, all of them were surprised when
the tire suddenly exploded. What is the probable explanation for the blown out
tire during a long summer drive?
a. The high Temperature causes a decrease in volume.
b. The amount of the gases inside the tire is increases
c. The mass of the gases inside the tire increases causing a blown up tire.
d. The volume of gases increases as the temperature increases, causing a
blown up tire.
4. How can you possibly prove that gases have negligible mass?
a. put a balloon in a digital balance before and after you fill it with air
b. feel the weight of the samples on both hands
c. ask two persons to hold a box filled with air
d. support your claim of thought equation
5. Each of the following containers is air tight and has the same number of gas
molecules. Which container has the highest pressure?
a. b. c. d.
6. Each of the following containers has the same size. Which of the following
containers has the most compressed gas molecules?
ii
a. b. c. d.
1 mole 2 moles 3 moles 4 moles

2. 7. All the gas sampleshave the same temperatureandmass.Inwhichof the followingconditions
will the gassample have the highestdensity?
a. b. c. d.
8. What happens to the density of a gas as its volume decreases at constant
pressure and temperature?
a. decreases c. stays the same
b. increases d. unpredictable
For numbers 9 to11, the choices are:
a. Boyle’s Law c. Combined Gas Law
b. Charles’ Law d. Ideal Gas Law
9. What law explains the mechanism of gas compressor?
10. What gas law best explains the explosion of the heated aerosol container?
11. What gas law explains the relationship among the volume, pressure,
temperature, and the number of moles of gases?
12. How will you represent the molecules of carbon dioxide at 30°C?
13. What kind of movement is exhibited by gas molecules?
a. vibrational movement c. translational movement
b. rotational movement d. combination of a, b and c
14. How does the temperature affect the average kinetic energy of gas molecules?
a. as the temperature decreases the average kinetic energy of gas molecules
decreases
b. as the temperature decreases the average kinetic energy of gas molecules
increases
c. as the temperature decreases the average kinetic energy of gas molecules
remains the same
d. as the temperature decreases the average kinetic energy of gas molecules
fluctuates
15. What will happen to the gas pressure as the temperature increases, if the
amount and volume of the gas are kept constant?
a. the gas pressure remains the same c. the gas pressure increases
b. the gas pressure decreases d. there is no significant effect
10 atm 8 atm 6 atm 4 atm

3. 16. Jane can still pump air in the party balloon even though it is already inflated.
What explains this phenomenon?
a. balloons look better if its size is bigger
b. balloons are made up of plastic
c. the air inside the balloon is hot
d. air molecules can be compressed
17. What is most likely to happen when an aerosol can is heated?
a. the can will be deformed
b. the can will stay the same
c. the can will eventually explode
d. the can will tarnish
18. Each container with varying volume has 1.0 mole of oxygen gas at 30.0°C.
In which container will pressure be the lowest?
19. Which of the following phenomena best illustrates Charles’ Law?
a. carbon dioxide being dissolved in water
b. expansion of the balloon as it is being submerged in hot water
c. breathing apparatus being used by a patient
d. leavening agent causing the fluffiness of cake products
20. Which of the following pair/s is/are correctly matched?
a. I & II b. III & IV c. I, III, & IV d. I, II, III, & IV
21. Which of the following samples is highly compressible at high pressure and
expandable at high temperature?
a. oxygen gas c. water
b. aluminum sheet d. ice
22. Records show that the incident of tire explosion is high during summer season.
Which of the following gives the best explanation for this observation?
a. there are more travellers during summer vacation
b. high temperature during summer season causes the air inside the tire
to expand
c. vehicles’ tires are not well maintained
d. there is too much air inside the tires
23. Which is most likely to happen when a closed vessel filled with gas is
shaken for 2 minutes?
a. the temperature inside the vessel increases
b. the pressure inside the vessel increase
c. the temperature and pressure inside the vessel increase
d. both the temperature and pressure inside the vessel increase

4. 24. Determine what will happen to the temperature of a confined gas as the
pressure decreases.
a. the gas temperature stays the same
b. the gas temperature decreases
c. the gas temperature increases
d. there is no enough data
25. Gab wants to have a portable oxygen tank. A 5.00 liter oxygen gas exerts
a pressure of 1.00 atmosphere. How much pressure is needed for this gas to be
compressed in a 2.00 liter cylinder, provided there is no temperature change?
a. 3.0 atm c. 2.0 atm
b. 2.5 atm d. 1.5 atm
26. The temperature of nitrogen gas contained in a not rigid vessel is reduced
from 100°C to 5.0°C? Which of the following describes the resulting behavior
of nitrogen gas molecules?
I. The average kinetic energy suddenly increases, thus the pressure increases
II. The average kinetic energy suddenly decreases, thus the pressure decreases
III. The volume occupied by the gas molecules suddenly increases, thus the
container expand
IV. The volume occupied by the gas molecules suddenly decreases, thus the
container shrink
a. I & III c. I & IV
b. II & IV d. II & II
27. A balloon with a volume of 200 mL at 30°C is submerged in hot water to
obtain a temperature of 50°C. Find out what will happen to the volume of the
balloon, provided the pressure remains the same.
a. the volume of the balloon will become higher than 200 mL
b. the volume of the balloon will become lower than 200 mL
c. the volume of the balloon will stay the same
d. there is no enough data
28. A 2.0 g (approximately 0.045 mole) sample of dry ice (solid carbon dioxide) is
placed in an evacuated 3.5 L vessel at 30°C. Compute for the pressure inside the
vessel after all the dry ice has been converted to carbon dioxide gas.
(R=0.0821 L. atm/mol.K)
a. 0.32 atm c. 0.67 atm
b. 0.45 atm d. 1.0 atm
29. What is the explanation to your answer in item number 28?
a. the gaseous form of dry ice exerts the same pressure with its
environment because it adopts the atmospheric pressure
b. the gaseous form of dry ice exerts lower pressure due to the bigger
volume that results to lesser collisions of the gas particles.
c. the gaseous form of dry ice will have the same pressure because its
composition remains the same
d. the gaseous form of dry ice will either have high or low pressure
30. What do you expect to happen to the volume of a gas if its pressure is
doubled and its temperature is reduced to half?
a. its volume is increased c. its volume remains unchanged
b. its volume is doubled d. its volume is decreased
31. What are standard temperature and pressure conditions for gases?
a. 0°C and 0 torr c. -273°C and 1 atm
b. 0 K and 760 torr d. 0°C and 760 torr e. 0°C and 1 torr

5. 32. If the volume of a confined gas is doubled while the temperature remains
constant, what change (if any) would be observed in the pressure?
a. It would be half as large.
b. It would double.
c. It would be four times as large
d. It would be 1/4 as large. e. It would remain the same.
33. A given mass of gas in a rigid container is heated from 100°C to 500°C. Which
of the following responses best describes what will happen to the pressure of the
gas?
a. The pressure will decrease by a factor of five.
b. The pressure will increase by a factor of five.
c. The pressure will increase by a factor of about two.
d. The pressure will increase by a factor of about eight.
34. Which of the following has the most molecules?
a. 1.00 L of CH4 at 0°C and 1.00 atm
b. 1.00 L of N2 at 0°C and 1.00 atm
c. 1.00 L of O2 at 20°C and 1.00 atm
d. 1.00 L of CO at 0°C and 1.25 atm
35. Avogadro stated that equal volumes of gases under the same conditions of
temperature and pressure have equal
a. numbers of molecules. c. molar masses
b. numbers of grams. d. atoms.
36. What volume of CH4 at 0°C and 1.00 atm contains the same number of
molecules as 0.50 L of N2 measured at 27°C and 1.50 atm?
a. 0.37 L c. 0.68 L
b. 0.46 L d. 0.50 L
37. If 3.0 L of helium at 20.0°C is allowed to expand to 4.4 L, with the pressure
remaining the same, what is the new temperature?
a. 702°C c. 157°C
b. 430°C d. -30.0°C
38. At what temperature will 41.6 grams N2 exerts a pressure of 815 torr in a 20.0 L
cylinder?
a. 134 K c. 238 K
b. 176 K d. 337 K
39. When 7.00 grams of helium and 14.0 grams of argon were mixed in a flask, the
pressure was measured as 712 torr. What is the partial pressure of the helium?
a. 593 torr c. 833 torr
b. 356 torr d. 1070 torr
40. Under what conditions do the assumptions associated with the application of an
ideal gas hold true?
a. low pressure and high temperature
b. high pressure and large volume
c. large volume and high temperature
d. small volume and high temperature
41. A hot-air balloon rises. Which is the best explanation for this observation?
a. the pressure on the walls of the balloon increases with increasing temperature
b. the difference in temperature between the air inside and outside the balloon
produces convection currents
c. the cooler air outside the balloon pushes in on the walls of the balloon
d. the density inside the balloon is less than that of the surrounding air

6. 42. A rigid metal tank contains helium gas. Which applies to the gas in the tank
when some helium is removed at constant temperature?
a. the volume of the gas decreases
b. the pressure of the gas decreases
c. the average speed of the gas molecules decreases
d. the total number of gas molecules remains the same
43. Which of the following is NOT a major source of protein?
a. fish c. milk
b. egg d. vegetable
44. Which of the following contains the most lipids?
a. banana c. olive oil
b. champorado d. cheese
45. Which of the following is a correct pair?
a. glucose: disaccharide c. starch: polysaccharide
b. sucrose: monosaccharide d. triglyceride: polysaccharide
46. Which is a correct pair of an example of protein and its function?
a. enzymes: speed up reactions in the body and eventually used up in the process.
b. collagen: provides strength and flexibility to connective tissues.
c actin and myosin: supplies amino acids to baby mammals
d. hemoglobin: helps regulate blood sugar levels
47. Nutritional chemists have found that burning 1 gram of fat releases twice
the amount of heat energy as burning 1 gram of starch. Based on this
information, which type of biomolecule would cause a person to gain more
weight?
a. carbohydrate c. proteins
b. fat d. nucleic acid
48. Which of the following groups are all classified as polysaccharide?
a. sucrose, glucose and fructose c. glycogen, sucrose and maltose
b. maltose, lactose and fructose d. glycogen, cellulose and starch
49. Amino acids are the building blocks of which group of biomolecules?
a. proteins c. lipids
b. carbohydrates d. nucleic acid
50. Which of the following is the major function of carbohydrates?
1. structural framework 2. storage 3. energy production
a. 1 only c. 3 only
b. 2 only d. 1 & 3 only

7. KEY
1. C
2. A
3. D
4. A
5. A
6. D
7. C
8. B
9. A
10.C
11.D
12.A
13.D
14.B
15.C
16.D
17.C
18.D
19.B
20.D
21.A
22.B
23.D
24.B
25.B
26.B
27.A
28.A
29.D
30.D
31.D
32.A
33.C
34.D
35.A
36.C
37.B
38.A
39.B
40.A
41.D
42.B
43.D
44.C
45.C
46.B
47.B
48.C
49.D
50.A
Prepared by: Grade 10 Teachers
Trixia A. Palmos
Evangeline B. Fumar
Racquel M. Bauzon
Checked by: Carmelita G. Yap Noted by: Ma. Teresa B. Delos Santos
Science Coordinator Master Teacher 1
Teacher-In-Charge

8. SIM
REPRODUCTIVE SYSTEM
Main Task :
Differentiate male and female reproductive system
Sub Task:
1. Identify the parts of male and female reproductive system
2. Describe the functions of male and female reproductive parts.
3. Appreciate the importance of male and female reproductive parts.