LATEST 2024-2025 ACTUAL EXAM 100 QUESTIONS
AND CORRECT DETAILED ANSWERWERS WITH
RATIONALES|ALREADY GRADED A+
In a concert hall, sound waves are bent around objects. This is an example of
A. constructive interference.
B. destructive interference.
C. diffraction.
D. the Doppler effect. - ANSWERwer-C
Two balloons with opposite electrostatic charges will A.
repel one another.
B. attract one another.
C. have no effect on each other.
D. emit a spark. - ANSWERwer-B
The device that changes AC (alternating current) to DC (direct current) is a (an) A.
generator.
B. trANSWERformer.
C. motor.
D. rectifier. - ANSWERwer-D
Which phase change indicates that a substance gains energy?
A. freezing
B. deposition
C. condensation
D. sublimation - ANSWERwer-D
,A great deal of solar radiation from the Sun enters the atmosphere and reaches Earth, while some
energy is reflected back into space. This is a demonstration of A. conservation of energy.
B. excess input energy.
C. decrease in entropy.
D. total loss of energy. - ANSWERwer-B
The combining of atomic nuclei within the Sun that releases tremendous energy is called A.
alpha decay.
B. beta decay.
C. fission.
D. fusion. - ANSWERwer-D
Which type of radiation has the highest energy?
A. x-rays
B. gamma rays
C. infrared
D. ultraviolet (UV) - ANSWERwer-B
A mirror used to enlarge the image of a person using it to put on make up is A.
convex.
B. concave.
C. flat.
D. focused. - ANSWERwer-B
What is the power drawn by a 240-volt oven that is rated for 40 amps?
A. 0.167 joules
B. 9,600 watts
,C. 6.0 watts
D. 167 joules - ANSWERwer-B
It is believed that this layer of the Earth is composed mainly of liquid iron.
A. crust
B. mantle
C. outer core
D. inner core - ANSWERwer-C
The time known as the "age of dinosaurs" occurred during which geologic era?
A. Precambrian
B. Cenozoic
C. Mesozoic
D. Paleozoic - ANSWERwer-C
Compared to the inner core, the Earth's outer core is believed to be
A. less dense and cooler. B. less dense and hotter.
C. more dense and hotter.
D. more dense and cooler - ANSWERwer-A
Which of the following surface ocean currents is known for being slow moving and cool?
A. California Current
B. Brazil Current
C. South Pacific Equatorial Current
D. Gulf Stream - ANSWERwer-A
Where do oceanic ridges form?
A. Ridges form along divergent plate boundaries.
, B. Ridges form along convergent plate boundaries.
C. Ridges form where freshwater meets seawater.
D. Ridges are the slopes from the continental shelf to the abyssal plain. - ANSWERwer-A
Rocks or minerals formed in the openings of existing rocks during chemical reactions are called
A. igneous rocks.
B. sedimentary rocks.
C. metamorphic rocks.
D. precipitated rocks. - ANSWERwer-D
Which mineral is lowest on the Mohs hardness scale?
A. calcite
B. talc
C. diamond
D. quartz - ANSWERwer-B
Which layer of the atmosphere do most birds fly in?
A. stratosphere
B. mesosphere
C. thermosphere
D. troposphere - ANSWERwer-D
What cloud formations are composed entirely of ice?
A. cumulus
B. cirrus
C. cumulonimbus
D. nimbostratus - ANSWERwer-B