WorksheetsPractice Drill - Physical Science 2
Total questions: 20
Worksheet time: 20mins
In Moh’s scale, which is the softest and the hardest mineral?
Talc – Diamond
Gypsum – Quartz
Calcite – Feldspar
Talc – Corundum
According to the kinetic molecular theory, liquids are similar to solids in that ___________
their molecules are arranged in a regular manner.
the motion of their particles changes with temperature.
the motion of their particles cannot be determined.
there is very little space between their molecules.
When two or more objects collide the quantity that does NOT change is the total __________.
Momentum of all the objects
kinetic energy of each object
kinetic energy of all the objects
momentum of each object
What is the correct formula for finding the efficiency of a machine?
Efficiency = input force /output force x 100%
Efficiency = output force/input force x 100%
Efficiency = output work/input work x 100%
Efficiency = input work/ output work x 100%
The energy of a hammer hitting a nail is
heat
chemical
electrical
mechanical
Disregarding air resistance, an object falling towards the earth’s surface has an acceleration that is _____________.
decreasing
increasing
constant
depending on object’s weight
If the moon’s gravity becomes 1/4 that of Earth, which of the following will apply?I
I. The moon will no longer cause tides on the earth’s oceans.I
I. A 65–kilo person on earth will weigh about 18 kilos on the moon.
III. It will be easy to lift heavy objects on the moon.
IV. The moon will not hold a thick atmosphere of gasses.
II, III and IV
I, II and IV
I, II and III
I, II, III and IV
The headings of a car with a 12V electrical system are 40W each the tail lights 6.0 W each, and the radios is 20 W. What is the total power of this circuit?
1200 W
240 W
110 W
3600 W
Abundance of waste materials in water decreases primary productivity due to ___________.
blockage of light penetration
amount of nutrients available
reduced amount of oxygen in the water
accumulation of aquatic organisms
What is the direction of the magnetic field in an electromagnetic wave?
parallel to the electric field
perpendicular to the electric field
parallel to the motion
random
A ball of mass 0.15 is thrown with a speed of 20 m/s against a wall. What is its momentum if it rebounds after colliding elastically?
+3.0 kg m/s
-30 kg m/s
-3.0 kg m/s
+30 kg m/s
How are echoes minimized in halls and auditoriums?
covering hard reflecting surfaces with curtains
opening the doors of the auditoriums
creating a wider space for sound to travel
limiting the accessories installed inside
A large depression caused by a collapse of the slopes of a volcano is called a _________.
basin
syncline
base level
caldera
Where does the pick up needle on a phonograph move the fastest across the record?
At the end
The needle move at the same speed throughout
In the middle of the phonograph record
At the beginning
Compared to the density of seawater, a kind of fish that lives at the bottom of the ocean has a density that is __________.
lesser
greater
same
equal
The additional of Br2 is used as the reaction to distinguish between alkenes and alkanes. Which of the following observations accompanies this test?
The additional of Br2 is used as the reaction to distinguish between alkenes and alkanes. Which of the following observations accompanies this test?
A bright red color is produced when Br2 reacts with alkenes.
The red color of bromine disappears when it dissolves in alkenes.
Bromine dissolved in alkenes but not in alkenes.
Which statement is CORRECT about a rechargeable battery?
Its REDOX reactions are not complete
Its REDOX reactions are not reversible.
Its REDOX reactions are complete.
Its REDOX reactions are reversible
A ray of light is incident on a plane surface separating two transparent substances of refractive indices 1.70 and 1.50. The angle of incidence is 30 deg and the ray originates in the medium of higher index. The angle of refraction is _________.
79.0
34.5
45.0
26.2
Chrome plating is one method to prevent corrosion. This process can be carried out by_______.
using secondary cells
electrolytic process
using primary cells
zone refining
What does the slope of the graph of stretching force against elongation indicate?
elastic limit
resistivity constant
gravitational limit
spring constant
