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WorksheetsAqSicence Final Practice
Total questions: 60
Worksheet time: 33mins
What percentage of Earth's atmosphere is composed of Nitrogen?
21%
0.9%
78%
0.1%
Which layer of the atmosphere is closest to Earth and is where weather occurs?
Stratosphere
Troposphere
Mesosphere
Thermosphere
What is the primary driver of weather systems, wind, and ocean currents?
Earth's geothermal activity
The Moon's gravitational pull
The Sun
Human industrial emissions
The Coriolis effect causes moving objects in the Southern Hemisphere to be deflected to the:
Right
Left
East
West
Which global wind pattern is found approximately between 0-30° latitude and blows towards the equator?
Prevailing Westerlies
Polar Easterlies
Trade Winds
Monsoons
Large, circular loops of wind-driven surface currents that travel clockwise in the Northern Hemisphere are called:
Eddies
Tides
Gyres
Convection cells
The net movement of water due to Ekman Transport is typically at what angle to the wind direction in the Southern Hemisphere?
Which phenomenon ceases upwelling in the Pacific and can lead to increased storms and rainfall on land?
La Niña
The Gulf Stream
El Niño–Southern Oscillation (ENSO)
Thermohaline Circulation
The zone in the ocean where there is a rapid change in temperature over a small depth interval is known as the:
Epipelagic zone
Bottom layer
Thermocline
Halocline
According to the Big Bang Theory, approximately how old is the Earth?
4.5 million years
1 billion years
4.5 billion years
10 billion years
Which part of Earth's internal structure is a fluid-like upper part of the mantle?
Inner Core
Lithosphere
Outer Core
Asthenosphere
Oceanic crust is primarily composed of which type of rock?
Granite
Sandstone
Basalt
Limestone
Alfred Wegener proposed the theory of continental drift, which included the idea of a supercontinent named:
Rodinia
Gondwana
Pangea
Laurasia
What is the largest geological feature on Earth, entirely volcanic, and encircles the globe underwater?
The Mariana Trench
The Himalayan Mountains
The Mid-Ocean Ridge
The Great Barrier Reef
Symmetrical patterns of magnetic anomalies (stripes) on either side of mid-ocean ridges are evidence for:
The constant strength of Earth's magnetic field
The Earth's core being entirely solid
Sea-floor spreading and magnetic field reversals
The immediate cooling of all volcanic rock
Lithogenous sediments found on the ocean floor originate from:
Shells and skeletons of marine organisms
Weathered down rock
Volcanic eruptions exclusively at mid-ocean ridges
Extraterrestrial meteorites
The process where an oceanic plate descends into the mantle beneath another plate is called:
Rifting
Sea-floor spreading
Subduction
Transform faulting
What type of plate boundary occurs when plates slide past each other horizontally, often causing earthquakes?
Convergent boundary
Divergent boundary
Subduction zone
Transform boundary
In a water molecule (H₂O), what type of bond holds the hydrogen atoms to the oxygen atom?
Ionic Bond
Hydrogen Bond
Covalent Bond
Metallic Bond
The polarity of water molecules, where the oxygen end is slightly negative and the hydrogen ends are slightly positive, is due to:
Equal sharing of electrons between oxygen and hydrogen
The presence of dissolved salts in water
Uneven sharing of electrons between oxygen and hydrogen
The high heat capacity of water
The attraction between water molecules, causing them to stick to each other, is known as:
Adhesion
Cohesion
Viscosity
Surface Tension
Water's ability to allow small insects to walk on its surface is primarily due to its high:
Viscosity
Heat capacity
Surface tension
Density
The amount of heat it takes to raise the temperature of 1 gram of water by 1°C is defined as one:
Joule
Watt
Calorie
Newton
When water freezes, it expands. This is because:
The water molecules gain kinetic energy.
Hydrogen bonds lock the water molecules into a fixed, open lattice structure.
The density of water increases upon freezing.
Air bubbles become trapped within the ice.
Water's high heat capacity means it can:
Freeze very quickly.
Boil at a relatively low temperature.
Absorb a large amount of heat without a large increase in its own temperature.
Dissolve only non-polar substances.
Why is water considered the "universal solvent"?
It is found everywhere on Earth.
It can dissolve more substances than any other natural liquid.
All life requires water to survive.
It is perfectly neutral with a pH of 7.0.
The bonds between the oxygen and hydrogen atoms within a single water molecule are _____ than the hydrogen bonds between adjacent water molecules.
Weaker
Stronger
Equal in strength
Non-existent
The transparency of seawater is crucial for marine ecosystems because it allows:
Sound to travel faster.
Salts to dissolve easily.
Sunlight to penetrate for photosynthesis by organisms.
Pressure to remain constant with depth.
With every 10 meters of depth in the ocean, the pressure increases by approximately:
0.1 atmosphere
1 atmosphere
5 atmospheres
10 atmospheres
Which of these factors generally increases the speed of sound in seawater?
Decreased temperature
Decreased salinity
Increased pressure
Increased cloud cover
The total amount of salt dissolved in seawater is known as:
Density
pH
Salinity
Solubility
Sodium and chloride make up approximately what percentage of the solutes in seawater?
25%
50%
85%
99%
The "Rule of Constant Proportions" states that:
All oceans have the exact same salinity value.
The major dissolved ions in seawater occur everywhere in the same proportions.
Temperature is always proportional to salinity.
The density of seawater never changes.
Which of these processes would lead to an increase in local seawater salinity?
Heavy precipitation
Melting of polar ice caps
River runoff
Evaporation
The density of seawater is primarily controlled by:
Wind speed
The amount of dissolved oxygen
Temperature
The presence of marine life
Ocean acidification is caused by the ocean absorbing excess ______ from the atmosphere, leading to a decrease in pH.
Oxygen
Nitrogen
Carbon Dioxide
Sulfur Dioxide
The movement of molecules from an area of high concentration to an area of low concentration is called:
Osmosis
Active transport
Diffusion
Pinocytosis
A cell membrane that allows some substances to pass through but blocks others is described as:
Impermeable
Fully permeable
Selectively permeable
Actively transporting
What process allows cells to move materials against their concentration gradient, requiring energy (ATP)?
Diffusion
Osmosis
Active transport
Facilitated diffusion
An organism like a jellyfish, whose internal solute concentration fluctuates with the salinity of the surrounding seawater, is an example of an:
Osmoregulator
Ectotherm
Osmoconformer
Endotherm
An organism that maintains a stable internal body temperature regardless of the external temperature is called a:
Ectotherm
Homeotherm
Osmoconformer
Poikilotherm
Marine mammals often have a thick layer of blubber, which serves as insulation. This is an adaptation primarily for:
Buoyancy
Camouflage
Temperature regulation (maintaining body heat)
Resisting water pressure
The streamlined body shape of many fast-swimming marine animals like tuna or dolphins is an adaptation to reduce:
Heat loss
The effects of water pressure
Water resistance due to viscosity
Salt intake through the skin
Some deep-sea organisms have very large eyes. This is likely an adaptation for:
Detecting bioluminescent prey or mates in dim light
Withstanding high pressure
Filtering plankton from the water
Navigating by stars
Many fish possess a gas-filled sac called a swim bladder, which helps them control:
Their body temperature
Their digestion rate
Their buoyancy
Their salt balance
The ozone layer is primarily found in the Troposphere.
True
False
It is primarily found in the Mesosphere.
It is not found in any specific layer.
Deep ocean currents are primarily driven by wind.
True
False
They are primarily driven by the moon's gravity.
They are primarily driven by seismic activity.
Continental crust is generally thinner and younger than oceanic crust.
True
False
It is thicker and younger than oceanic crust.
It has the same thickness and age as oceanic crust.
When a salt crystal is added to water, the ionic bonds of the salt are strengthened by the water molecules.
True
False
The covalent bonds of the salt are strengthened.
Water molecules form new, stronger ionic bonds with each other.
Carbon dioxide is less soluble in seawater than oxygen.
True
False
They have nearly identical solubility in seawater.
Neither gas is significantly soluble in seawater.
Active transport requires a cell to expend energy (ATP).
True
False
An ectotherm generates significant metabolic heat to maintain a body temperature higher than its surroundings.
True
False (Correct Answer)
Ectotherms use blubber for heat generation.
Ectotherms always have a body temperature lower than their surroundings.
The tendency for the path of a moving object to shift to the right in the Northern Hemisphere is due to the _____ effect.
Convection
Coriolis
Gyre
Subduction
_____ cells in the atmosphere are formed by the rising of warm, less dense air and the sinking of cooler, denser air.
Coriolis
Thermohaline
Convection
Gyre
The _____ is the rigid outer layer of Earth that includes the crust and the upper-most portion of the mantle.
Asthenosphere
Troposphere
Lithosphere
Atmosphere
The attraction of water molecules to other water molecules due to hydrogen bonds is known as _____
Viscosity
Osmosis
Cohesion
Solubility
The measure of a fluid's resistance to flow is called _____
Density
Salinity
Viscosity
Cohesion
The global circulation pattern driven by differences in temperature and salinity is known as _____ circulation.
Convection
Gyre
Thermohaline
Coriolis
The diffusion of water across a selectively permeable membrane is called _____
Diffusion
Cohesion
Osmosis
Viscosity
The layering of seawater based on differences in temperature and salinity is known as stratification, which is a result of varying.
Salinity
Viscosity
Density
Solubility
