Exploring Earth and Its Processes

What depth range do abyssal plains typically occur at?

• Between 9,800 and 20,000 feet deep

• Below 30,000 feet

• At sea level

• Between 100 and 500 feet deep

How are abyssal plains formed?

• By river deposits

• From seafloor spreading

• Due to ice melting

• Through volcanic activity

What is the pH value of acidic solutions?

• Less than 7

• Exactly 7

• pH is not applicable

• More than 7

What role do acids play in food?

• Sweetening agents

• Preservatives and taste modifiers

• Coloring agents

• Thickening agents

What happens when two air masses with different temperatures meet?

• A storm can develop

• It becomes warmer

• Air pressure decreases

• No change in weather

What increases air pressure?

• Higher altitudes

• Increasing humidity

• Lower temperatures

• Decreasing humidity

What is the asthenosphere made of?

• Liquid magma

• Pure iron

• Gaseous substances

• Solid but plastically flowing rock

Why does the asthenosphere behave plastically?

• It's made of liquid

• Due to its high temperature

• Low pressure

• It contains a lot of water

Where are atolls most commonly found?

• Atlantic Ocean

• Pacific and Indian Oceans

• Southern Ocean

• Arctic Ocean

What is the significance of an atoll's lagoon?

• Acts as a natural harbor

• Supports coral reef growth

• There is no significance

• It's used for fishing