Question

1. how much does a chemical reaction rate typically increase for every 10°c rise in temperature?

a. it triples
b. it doubles
c. it increases by 50%
d. it increases by 25%

1. which factor most significantly affects frost wedging?

a. wind velocity
b. freeze - thaw cycles
c. chemical composition
d. rock color

1. which earth system is responsible for recycling nutrients back into the environment? a. producers

b. decomposers
c. consumers

Explanation:

1. According to the Arrhenius equation - like relationships in chemistry, the rate of a chemical reaction typically doubles for every 10°C rise in temperature.
2. Frost - wedging is a physical weathering process mainly affected by freeze - thaw cycles. Water seeps into cracks, freezes, expands, and widens the cracks.
3. Decomposers break down dead organic matter and recycle nutrients back into the environment. Producers make their own food using sunlight, and consumers eat producers or other consumers.

Answer:

1. b. It doubles
2. b. Freeze - thaw cycles
3. B. Decomposers