Which is an example of chemical weathering?(1 point)
Responses
burrowing animals digging a home in rock
burrowing animals digging a home in rock
rock breaking apart during a rock slide
rock breaking apart during a rock slide
decomposition of rock when exposed to acidic plants
decomposition of rock when exposed to acidic plants
a crack in rock growing larger as water freezes in it
a crack in rock growing larger as water freezes in it
decomposition of rock when exposed to acidic plants
In frost wedging, a crack expands when water __________. When the water ___________ it can seep into new fissures in the rock. (fill in the blanks)(1 point)
Responses
melts, melts
melts, melts
freezes, freezes
freezes, freezes
freezes, melts
freezes, melts
melts, freezes
freezes, freezes
The natural shifting of a river’s course has caused the river to separate into two branches. One branch continues in the river’s previous course. The other branch takes a new route across the land. Eventually, it empties into the ocean. Which landform will most likely form where the new branch empties into the ocean?(1 point)
Responses
delta
delta
mountain
mountain
hill
hill
canyon
delta
How did the success of photosynthetic bacteria change Earth’s atmosphere?(1 point)
Responses
decreased oxygen concentration
decreased oxygen concentration
increased hydrogen concentration
increased hydrogen concentration
decreased hydrogen concentration
decreased hydrogen concentration
increased oxygen concentration
increased oxygen concentration
Which statement about biodiversity in coral reefs is accurate?(1 point)
Responses
More new species have evolved in coral reef habitats than in most other types of habitats.
More new species have evolved in coral reef habitats than in most other types of habitats.
Species that evolved in coral reef habitats always stay in those habitats.
Species that evolved in coral reef habitats always stay in those habitats.
Coral reefs have much biodiversity, but most species that live there migrated from other habitats.
Coral reefs have much biodiversity, but most species that live there migrated from other habitats.
Most organisms that live in coral reef habitats are zooxanthellae.
Coral reefs have much biodiversity, but most species that live there migrated from other habitats.
The weathering of four different rock samples with different masses was studied. Each rock sample was placed in a separate beaker containing 500 milliliters of a dilute acid for 10 minutes. Bubbling was observed in some of the beakers. The data table below shows the mass of each sample, in grams, before placement in the acid and after removal from the acid.
Which Earth process is being modeled in this experiment?
(1 point)
Responses
photosynthesis
photosynthesis
physical weathering
physical weathering
erosion
erosion
chemical weathering