5th Q4 Comprehension Section of Study Guide

What is the narwhal's horn actually?

• A special type of bone

• Their left front tooth

• A mythical unicorn horn

• A part of their dorsal fin

Where do narwhals spend their winters?

• In the Pacific Ocean

• In the Indian Ocean

• In Baffin Bay

• In the Mediterranean Sea

Why can narwhals swim easily under Arctic ice?

• They have special gills

• They lack dorsal fins

• They have a strong tail

• They are very small

What is one threat to narwhals due to climate change?

• Less sunlight

• More food availability

• Increased ice coverage

• More predators like orcas

How do scientists use narwhals to study climate change?

• By studying their sleeping habits

• By attaching tags to measure water temperatures

• By observing their migration patterns

• By analyzing their swimming speed

What did researchers observe about narwhals when noisy ships passed by?

• They swam faster

• They became more vocal

• They fell silent

• They hunted more

What change in narwhals' diet has been observed due to climate change?

• They eat more seaweed

• They eat more fish from open waters

• They eat more Arctic cod

• They eat more halibut

How do narwhal tusks help scientists understand climate change?

• By measuring the narwhals' weight

• By indicating the narwhals' speed

• By revealing dietary changes over time

• By showing the narwhals' age

What is the significance of the rings in a narwhal's tusk?

• They show the narwhal's age

• They indicate the narwhal's health

• They provide data about the Arctic climate

• They reveal the narwhal's speed

What is one potential impact of climate change on narwhals' energy levels?

• Increased energy due to warmer waters

• Increased energy due to more food

• Decreased energy due to fewer calories

• No change in energy levels