What burrows help aerate soil, which is also good for plants?
Options:
- (A) leaves
- (B) adding heat
- (C) Exfoliation
- (D) good
- (E) roots
- (F) wind
- (G) rocks
- (H) annelids
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Let's think first: Earthworm burrows help aerate soil, which is also good for plants. Earthworms Earthworms are in the phylum Annelids. Annelid burrows help aerate soil, which is also good for plants.... So the answer is [(H)]

What can slowly dissolve carbon in sedimentary rock?
Options:
- (A) hydrocarbons
- (B) acetic acid
- (C) precipitation
- (D) evaporation
- (E) rivers and streams
- (F) puddles
- (G) ponds
- (H) nitrogen
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Let's think first: Flowing water can slowly dissolve carbon in sedimentary rock. Rivers and streams are bodies of fresh, flowing water. Rivers and streams can slowly dissolve carbon in sedimentary rock.... So the answer is [(E)]

Where in the plant does growth in width or girth originate?
Options:
- (A) conductive tissue
- (B) carbon dioxide
- (C) Veins and arteries.
- (D) It gets more light
- (E) photosynthesis
- (F) at or near the margins
- (G) vascular tissue
- (H) in the autumn season
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Let's think first: Secondary meristem is located within and around the vascular tissues. Growth in girth is caused by other meristems, called secondary meristems. Plant growth in width or girth emanates from within and around the vascular tissues.... So the answer is [(G)]

What is used as energy by most of the organisms on earth
Options:
- (A) sugar
- (B) heat
- (C) food
- (D) water
- (E) Light
- (F) Energy
- (G) salt
- (H) carbon
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Let's think first: Glucose is used for energy by the cells of most organisms. Blood Sugar Glucose is sugar. Sugar is used for energy by the cells of most organisms.... So the answer is [(A)]

What makes food from co and h 2?
Options:
- (A) producers
- (B) carbon atoms
- (C) Most plants
- (D) production lines
- (E) light energy
- (F) trees
- (G) air pockets
- (H) Chlorophyll
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Let's think first: Producers make food from inorganic molecules. Among the small inorganic molecules which are economically attractive are CO and H 2 . Producers make food from CO and H 2.... So the answer is [(A)]

What kind of animal lives in most terrestrial, freshwater and marine habitats?
Options:
- (A) animals
- (B) swimming
- (C) snails
- (D) tortoises
- (E) barnacles
- (F) swea
- (G) protected
- (H) a fish
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Let's think first: Mollusks live in most terrestrial, freshwater, and marine habitats. Mollusks in the diorama include snails and clams. Snails live in most terrestrial, freshwater and marine habitats.... So the answer is [(C)]