Slide 1 : VIRTUAL CLASS IN SCIENCE
September 19, 2009; 6:00 p.m.
Ma’am Lorna Aporto www.upcatreview.com/highschoolreview At constant volume and temperature, pressure (in gases) is directly related to the number of molecular collisions. The greater the number of molecular collisions, the higher the pressure. Based on this definition, which diagram would exhibit the highest pressure?
A. B. C. D.
Note: The circles denote moving molecules.
a. A c. C
b. B d. D
Slide 2 : VIRTUAL CLASS IN SCIENCE
September 19, 2009; 6:00 p.m.
Ma’am Lorna Aporto www.upcatreview.com/highschoolreview 2. Identify the appropriate quantity being described by the following units:
a. cm3
b. kg
c. mm
d. L
e. g/mL
f. N
g. in
h. 0 C
i. mL
j. km
hr VOLUME VOLUME MASS FORCE DENSITY LENGTH VOLUME SPEED/VELOCITY TEMPERATURE LENGTH
Slide 3 : VIRTUAL CLASS IN SCIENCE
September 19, 2009; 6:00 p.m.
Ma’am Lorna Aporto www.upcatreview.com/highschoolreview 3. All of the given processes are examples of chemical change EXCEPT
a. rusting of nail b. burning of garbage
c. digestion of food
d. evaporation of water
Note: Processes such as burning, rusting, digestion, fermentation or tarnishing indicate chemical change. On the other hand, evaporation, condensation, melting, freezing are some examples of processes denoting physical (phase) change.
Slide 4 : VIRTUAL CLASS IN SCIENCE
September 19, 2009; 6:00 p.m.
Ma’am Lorna Aporto www.upcatreview.com/highschoolreview 4. The chart below shows how long it took a seed to sprout at three different temperatures.
Based on the table, how many days will it take for the same kind of seed to sprout at 95 0F ?
a. 31 c. less than 31
b. more than 31 d. 35
Slide 5 : VIRTUAL CLASS IN SCIENCE
September 19, 2009; 6:00 p.m.
Ma’am Lorna Aporto www.upcatreview.com/highschoolreview 5. The organ which is NOT part of the digestive system is the
a. colon
b. kidney
c. mouth
d. stomach
Note: Kidney is part of the EXCRETORY system.
Slide 6 : VIRTUAL CLASS IN SCIENCE
September 19, 2009; 6:00 p.m.
Ma’am Lorna Aporto www.upcatreview.com/highschoolreview 6. Which pair of scientist and discovery/invention is TRUE?
a. Edison : telephone
b. Fleming : telescope
c. Galileo : penicillin
d. Newton : gravity
Note: EDISON was known for his invention of the light bulb and phonograph.
FLEMING discovered penicillin.
GALILEO developed a telescope that led him to the
discovery of Jupiter’s moons.
Slide 7 : VIRTUAL CLASS IN SCIENCE
September 19, 2009; 6:00 p.m.
Ma’am Lorna Aporto www.upcatreview.com/highschoolreview 7. In Kelvin, 45 0F is equivalent to
a. 386 c. 280
b. 318 d. 113
Note: Strategy: 0F ? 0C ? K
1. 0F ? 0C 5/9 (F – 32) = 5/9 (45 – 32)
5/9 (13) = (13) (5) / 9 = 7.2 0C
2. 0C ? K 0C + 273 = 7.2 + 273
= 280.2 K (280)
Slide 8 : VIRTUAL CLASS IN SCIENCE
September 19, 2009; 6:00 p.m.
Ma’am Lorna Aporto www.upcatreview.com/highschoolreview 8. Which is NOT an element?
a. copper
b. calcium
c. carbon dioxide
d. aluminum
Note: Elements are pure substances which are made up
of only one kind of atom while compounds are pure substances which are made up two or more elements which are chemically combined.
Carbon dioxide is composed of the elements carbon and oxygen.
Slide 9 : VIRTUAL CLASS IN SCIENCE
September 19, 2009; 6:00 p.m.
Ma’am Lorna Aporto www.upcatreview.com/highschoolreview 9. The volume (in m3) of a substance with a mass of 105 kg and density of 1.5 kg/m3 would be
a. 157.5 c. 70
b. 106.5 d. 0.014
Note: (Analysis) Given: mass - 105 kg; density – 1.5 kg/m3
Required/Asked: volume
Strategy: Use DENSITY formula ( D = m/V )
Solution: If D = m/V, then V = m / D
(Substituting values) V = m / D V = 105 / 1.5
V = 70 m3
Slide 10 : VIRTUAL CLASS IN SCIENCE
September 19, 2009; 6:00 p.m.
Ma’am Lorna Aporto www.upcatreview.com/highschoolreview 10. Which concept is CORRECT?
a. The earth’s revolution around the sun causes day and night
b. Weight is the gravitational force acting on an object
c. A solar eclipse occurs when the sun is between the earth and moon
d. Meteors are large pieces of shooting stars that reach the surface of the earth
Note:
The earth’s ROTATION ON ITS AXIS causes day and night.
SOLAR eclipse occurs when the sun, moon and earth are in
a straight line and the MOON is BETWEEN the SUN and the EARTH.
METEORITES are large pieces of shooting stars that reach the surface of the earth.