What do organisms cluster around in the ocean floor?
Options:
- (A) kalenchoes
- (B) ferns
- (C) bacteria
- (D) Chimneys
- (E) an object
- (F) alveoli
- (G) graptolites
- (H) allow growth
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Let's think first: Organisms cluster around hydrothermal vents in the ocean floor. Chimneys top some hydrothermal vents. Organisms cluster around chimneys in the ocean floor.... So the answer is [(D)]

Some insets can use their antennae to detect what?
Options:
- (A) light waves
- (B) photons
- (C) Electrical energy
- (D) vibrating air
- (E) new lands
- (F) water sources
- (G) bending light rays
- (H) electricity
--
Let's think first: Some insects can use their antennae to detect sound. When ears detect the vibrating air, signals are sent to the brain that are interpreted as sounds. Some insets can use their antennae to detect vibrating air.... So the answer is [(D)]

What does fire require to get started?
Options:
- (A) an engine
- (B) activation energy
- (C) water
- (D) energy usage
- (E) direct energy
- (F) dogs
- (G) activated almonds
- (H) adding heat
--
Let's think first: All chemical reactions require activation energy to get started. Fire is a chemical reaction. Fire requires activation energy to get started.... So the answer is [(B)]

What forms in shallow tropical water?
Options:
- (A) ocean
- (B) romance
- (C) bushes
- (D) ferns
- (E) reefs
- (F) bamboo
- (G) fossils
- (H) snorkelling
--
Let's think first: Corals form large colonies in shallow tropical water. Huge colonies of hard corals form coral reefs . Reefs form in shallow tropical water.... So the answer is [(E)]

The group of bipedal dinosaurs that included dromaeosaurs eventually evolved into:
Options:
- (A) insects
- (B) animals
- (C) mammals
- (D) running
- (E) Man
- (F) alpacas
- (G) genus
- (H) birds
--
Let's think first: Birds evolved from a group of bipedal dinosaurs called theropods. Dromaeosaurs are part of the theropod group of dinosaurs. Birds evolved from a group of bipedal dinosaurs that included Dromaeosaurs.... So the answer is [(H)]

What can regrow sections that they have lost?
Options:
- (A) leeches
- (B) alveoli
- (C) crocodiles
- (D) vegetation
- (E) a fish
- (F) bacteria
- (G) barnacles
- (H) sharks
--
Let's think first: Annelids have the amazing capacity to regrow segments that break off. Annelids include earthworms and leeches. Leeches have the amazing capacity to regrow segments that break off.... So the answer is [(A)]