Which of the following statements about good experiments is TRUE? a) A good experiment must include all possible causal factors in one experimental group.
b) A good experiment must have an experimental group. A control group may be useful but is not critical.
c) A good experiment should include a potentially confounding factor in at least one group.
d) A good experiment includes replication by applying treatments to multiple experimental units

metamorphism is the change of minerals or geologic texture (distinct arrangement of minerals) in pre-existing rocks (protoliths), without the protolith melting into liquid magma (a solid-state change). the change occurs primarily due to heat, pressure, and the introduction of chemically active fluids. i hoped i !

supercell thunderstorms are perhaps the most violent of all thunderstorm types, and are capable of producing damaging winds, large hail, and weak-to-violent tornadoes