Which of the following weathering processes involves the constant freezing and thawing of water ? a. unloading b. frost wedging c. exfoliationd. spherical weathering

Iron reacts with oxygen to produce iron oxide (rust). this reaction is represented in an equation as 4fe + xo2 → 2fe2o3. identify the value of x that will balance the equation.

Aphids are tiny insects that feed on plants. ladybugs are to plants because they eat aphids. which type of organism are aphids in this scenario? co decomposers predators prey producers

What are some possible short and long term medical concerns for crew members on longer space exploration trips