Q. What is the primary cause of ocean acidification?
A.
Plastic pollution
B.
Increased CO2 absorption
C.
Heavy metal contamination
D.
Thermal pollution
Show solution
Solution
Ocean acidification is primarily caused by the increased absorption of CO2 from the atmosphere into ocean waters.
Correct Answer:
B
— Increased CO2 absorption
Learn More →
Q. What is the primary cause of ocean currents?
A.
Wind patterns
B.
Earth's rotation
C.
Temperature differences
D.
Salinity differences
Show solution
Solution
The primary cause of ocean currents is wind patterns, which drive the movement of water across the surface.
Correct Answer:
A
— Wind patterns
Learn More →
Q. What is the primary cause of sediment transport in rivers?
A.
Gravity
B.
Wind
C.
Human activity
D.
Temperature changes
Show solution
Solution
Gravity is the primary force that causes sediment to be transported downstream in rivers.
Correct Answer:
A
— Gravity
Learn More →
Q. What is the primary cause of surface tension in liquids?
A.
Cohesive forces
B.
Adhesive forces
C.
Gravitational forces
D.
Electromagnetic forces
Show solution
Solution
Surface tension is primarily caused by cohesive forces between liquid molecules, which create a 'skin' at the surface.
Correct Answer:
A
— Cohesive forces
Learn More →
Q. What is the primary cause of the greenhouse effect?
A.
Ozone depletion
B.
Increased solar radiation
C.
Trapping of heat by greenhouse gases
D.
Deforestation
Show solution
Solution
The greenhouse effect is primarily caused by the trapping of heat in the Earth's atmosphere by greenhouse gases.
Correct Answer:
C
— Trapping of heat by greenhouse gases
Learn More →
Q. What is the primary cause of the phenomenon known as capillarity?
A.
Cohesion
B.
Adhesion
C.
Viscosity
D.
Density
Show solution
Solution
Capillarity is primarily caused by adhesion, which is the attraction between the liquid molecules and the surface of the solid.
Correct Answer:
B
— Adhesion
Learn More →
Q. What is the primary cause of the phenomenon of buoyancy?
A.
Surface tension
B.
Pressure difference
C.
Viscosity
D.
Density
Show solution
Solution
Buoyancy is caused by the pressure difference between the top and bottom of an object submerged in a fluid.
Correct Answer:
B
— Pressure difference
Learn More →
Q. What is the primary cause of the phenomenon of capillarity?
A.
Cohesion
B.
Adhesion
C.
Viscosity
D.
Density
Show solution
Solution
Capillarity is primarily caused by adhesion, which is the attraction between the liquid molecules and the surface of the solid.
Correct Answer:
B
— Adhesion
Learn More →
Q. What is the primary cause of tides on Earth? (2019)
A.
Wind
B.
Earth's rotation
C.
Gravitational pull of the moon
D.
Ocean currents
Show solution
Solution
The primary cause of tides on Earth is the gravitational pull of the moon.
Correct Answer:
C
— Gravitational pull of the moon
Learn More →
Q. What is the primary cause of tuberculosis? (2020)
A.
Bacteria
B.
Virus
C.
Fungi
D.
Protozoa
Show solution
Solution
Tuberculosis is primarily caused by the bacterium Mycobacterium tuberculosis.
Correct Answer:
A
— Bacteria
Learn More →
Q. What is the primary cause of viscosity in fluids?
A.
Molecular interactions
B.
Temperature
C.
Pressure
D.
Density
Show solution
Solution
Viscosity arises primarily from molecular interactions within the fluid, which resist flow.
Correct Answer:
A
— Molecular interactions
Learn More →
Q. What is the primary cause of wind?
A.
Earth's rotation
B.
Temperature differences
C.
Humidity differences
D.
Pressure differences
Show solution
Solution
Wind is primarily caused by differences in atmospheric pressure.
Correct Answer:
D
— Pressure differences
Learn More →
Q. What is the primary challenge faced by virtual teams compared to traditional teams? (2023)
A.
Lack of technology.
B.
Difficulty in establishing personal connections.
C.
Increased productivity.
D.
Easier communication.
Show solution
Solution
Virtual teams often struggle with establishing personal connections due to physical distance, which can hinder team cohesion.
Correct Answer:
B
— Difficulty in establishing personal connections.
Learn More →
Q. What is the primary characteristic of a K-selected species? (2023)
A.
High reproductive rate
B.
Short lifespan
C.
High parental care
D.
Rapid growth
Show solution
Solution
K-selected species typically exhibit high parental care and invest more resources in fewer offspring.
Correct Answer:
C
— High parental care
Learn More →
Q. What is the primary characteristic of a redox reaction? (2023)
A.
Transfer of protons
B.
Transfer of electrons
C.
Change in temperature
D.
Change in pressure
Show solution
Solution
The primary characteristic of a redox reaction is the transfer of electrons between species.
Correct Answer:
B
— Transfer of electrons
Learn More →
Q. What is the primary characteristic of adsorption? (2023)
A.
It is a bulk phenomenon.
B.
It involves a chemical reaction.
C.
It is a surface phenomenon.
D.
It requires high temperature.
Show solution
Solution
Adsorption is a surface phenomenon where molecules adhere to the surface of a solid or liquid.
Correct Answer:
C
— It is a surface phenomenon.
Learn More →
Q. What is the primary characteristic of alkaline earth metals? (2020)
A.
They are highly reactive
B.
They have a +2 oxidation state
C.
They are gases at room temperature
D.
They form covalent bonds
Show solution
Solution
Alkaline earth metals typically have a +2 oxidation state due to the loss of two electrons.
Correct Answer:
B
— They have a +2 oxidation state
Learn More →
Q. What is the primary characteristic of amorphous solids? (2023)
A.
Long-range order
B.
Short-range order
C.
Definite melting point
D.
High thermal conductivity
Show solution
Solution
Amorphous solids have short-range order but lack long-range order, unlike crystalline solids.
Correct Answer:
B
— Short-range order
Learn More →
Q. What is the primary characteristic of Baroque art that emerged in the 17th century?
A.
Emphasis on emotion and movement
B.
Use of geometric shapes
C.
Focus on minimalism
D.
Incorporation of abstract forms
Show solution
Solution
Baroque art is characterized by its dramatic use of light and shadow, emotional intensity, and a sense of movement, reflecting the complexities of the human experience.
Correct Answer:
A
— Emphasis on emotion and movement
Learn More →
Q. What is the primary characteristic of gases compared to solids and liquids? (2023)
A.
Definite shape
B.
Definite volume
C.
High compressibility
D.
Low density
Show solution
Solution
Gases have high compressibility due to the large spaces between particles, unlike solids and liquids which have definite shape and volume.
Correct Answer:
C
— High compressibility
Learn More →
Q. What is the primary characteristic of gases? (2023)
A.
Definite shape
B.
Definite volume
C.
Compressibility
D.
Incompressibility
Show solution
Solution
Gases are highly compressible due to the large spaces between particles, allowing them to occupy more volume when pressure is applied.
Correct Answer:
C
— Compressibility
Learn More →
Q. What is the primary characteristic of insulators? (2019)
A.
Conduct electricity
B.
Absorb heat
C.
Prevent electricity flow
D.
Reflect light
Show solution
Solution
Insulators are materials that prevent the flow of electricity.
Correct Answer:
C
— Prevent electricity flow
Learn More →
Q. What is the primary characteristic of liquids that distinguishes them from solids?
A.
Definite shape
B.
Definite volume
C.
Incompressibility
D.
Fluidity
Show solution
Solution
Liquids have fluidity, allowing them to flow and take the shape of their container.
Correct Answer:
D
— Fluidity
Learn More →
Q. What is the primary characteristic of metals? (2019)
A.
Brittleness
B.
Luster
C.
Dullness
D.
Insulation
Show solution
Solution
Metals are known for their luster, which is the shiny appearance they exhibit when polished.
Correct Answer:
B
— Luster
Learn More →
Q. What is the primary characteristic of non-metals?
A.
Good conductors of heat
B.
High density
C.
Brittleness
D.
Luster
Show solution
Solution
Non-metals are generally brittle in solid form and do not exhibit metallic luster.
Correct Answer:
C
— Brittleness
Learn More →
Q. What is the primary characteristic that distinguishes living organisms from non-living things? (2020)
A.
Ability to reproduce
B.
Ability to move
C.
Ability to grow
D.
Ability to respond to stimuli
Show solution
Solution
The primary characteristic that distinguishes living organisms from non-living things is their ability to reproduce, which is essential for the continuation of species.
Correct Answer:
A
— Ability to reproduce
Learn More →
Q. What is the primary characteristic that distinguishes metals from non-metals? (2019)
A.
Luster
B.
Brittleness
C.
Conductivity
D.
Density
Show solution
Solution
Metals are generally good conductors of heat and electricity, while non-metals are poor conductors.
Correct Answer:
C
— Conductivity
Learn More →
Q. What is the primary characteristic that distinguishes solids from liquids? (2021)
A.
Solids have a definite shape and volume
B.
Liquids have a definite shape and volume
C.
Solids can flow
D.
Liquids can be compressed easily
Show solution
Solution
Solids maintain a definite shape and volume due to closely packed particles, while liquids take the shape of their container but have a definite volume.
Correct Answer:
A
— Solids have a definite shape and volume
Learn More →
Q. What is the primary charge carrier in n-type semiconductors?
A.
Holes
B.
Electrons
C.
Protons
D.
Neutrons
Show solution
Solution
In n-type semiconductors, electrons are the majority charge carriers due to the addition of donor impurities.
Correct Answer:
B
— Electrons
Learn More →
Q. What is the primary charge carrier in P-type semiconductors?
A.
Electrons
B.
Holes
C.
Protons
D.
Neutrons
Show solution
Solution
In P-type semiconductors, holes are the primary charge carriers.
Correct Answer:
B
— Holes
Learn More →
Showing 20131 to 20160 of 28706 (957 Pages)