Sharks

Sharks — Questions & Answers

Discover the fascinating world of Sharks in this medium level Ocean Trivia Quiz for Grade 7-8. Students will enhance their vocabulary, critical thinking, and subject knowledge while enjoying interactive gameplay.

1. What is the primary sense that most sharks use to detect prey in murky water?

   Sight Hearing Smell Touch

   ✓ Smell

   Sharks have an incredible sense of smell, allowing them to detect tiny amounts of blood or other substances in the water from great distances.

2. Which of these is NOT a type of shark?

   Great White Shark Hammerhead Shark Whale Shark Dolphin

   ✓ Dolphin

   Dolphins are marine mammals, not sharks. Sharks are fish.

3. What is the purpose of a shark's Ampullae of Lorenzini?

   To help them swim faster To detect electrical fields from other animals To store food To regulate body temperature

   ✓ To detect electrical fields from other animals

   The Ampullae of Lorenzini are jelly-filled pores that allow sharks to sense the weak electrical fields generated by the muscle contractions of their prey.

4. Which shark is known for its distinctive flattened head shape, resembling a hammer?

   Tiger Shark Hammerhead Shark Mako Shark Bull Shark

   ✓ Hammerhead Shark

   Hammerhead sharks are easily recognizable by their unique hammer-shaped heads, which help them to better detect prey and improve their maneuverability.

5. What do most sharks eat?

   Seaweed and plants Small fish and squid Plankton and krill Insects

   ✓ Small fish and squid

   While some sharks, like the whale shark, eat plankton, most sharks are carnivores that prey on fish, squid, crustaceans, and sometimes marine mammals.

6. How do sharks primarily breathe underwater?

   Through lungs like mammals By absorbing oxygen through their skin Using gills to extract oxygen from water By holding their breath for long periods

   ✓ Using gills to extract oxygen from water

   Sharks, like other fish, breathe by passing water over their gills, which extract dissolved oxygen from the water.

7. What is the largest known shark species in the world?

   Great White Shark Tiger Shark Whale Shark Megalodon

   ✓ Whale Shark

   The Whale Shark is the largest known living shark species, reaching lengths of up to 18 meters (60 feet) and feeding on plankton.

8. Shark skin is covered in tiny, tooth-like scales called:

   Placoid scales Epidermal scales Dermal scales Ctenoid scales

   ✓ Placoid scales

   Shark skin is covered in placoid scales, also known as dermal denticles, which are structurally similar to teeth and help reduce drag while swimming.

9. Which of these is a common misconception about sharks?

   Sharks are cold-blooded Sharks are always aggressive towards humans Sharks have existed for millions of years Sharks have cartilage skeletons

   ✓ Sharks are always aggressive towards humans

   While sharks can be dangerous, they are not always aggressive towards humans. Most shark bites are cases of mistaken identity or defensive actions.

10. What is the scientific term for the 'sixth sense' that some sharks possess, allowing them to detect electrical fields?

    Echolocation Magnetoreception Electroreception Bioluminescence

    ✓ Electroreception

    Electroreception is the ability to detect weak electrical fields, which sharks use with their Ampullae of Lorenzini to find hidden prey.