In which sealed container would the organisms be able to continuously cycle O2 and CO2 gases?
O
A. A terrarium with a frog and a pool of water
O
B. An aquarium with water plants and a snail
O
C. A terrarium with mice and wood shavings
O
D. An aquarium with fish and plastic plants

How is coal extracted from mountaintop removal mines? a. dynamite is used to create underground tunnels where miners go to extract the coal. b. dynamite is used to break apart rocks and then draglines are used to remove the broken rock and reach the coal. c. coal in mountaintops is extracted by digging strips in the landscape to reach the coal. d. placer deposits in mountain river bottoms are removed by

Two carts, one of mass 2m and one of mass m, approach each other with the same speed, v. when the carts collide, they hook together. assume that positive momentum is to the right. which graph best represents the momentum of both carts over time, before and after the collision?

Why do different substances have diffrent properties