Recent Calculations Show That the Tunguska Explosion in Siberia in 1908

question 143

Multiple Choice

Recent calculations show that the Tunguska explosion in Siberia in 1908 was probably caused by a

• A) large stony meteorite about 1 m across striking the ground at a high speed.
• B) small nuclear explosion.
• C) small comet nucleus about 1 km across suddenly vaporizing in the atmosphere.
• D) small stony asteroid about 80 m across exploding well above the ground.

---

Definitions:

Participant Observation

A research method where the researcher immerses themselves in the environment or society they are studying, often participating in the activities being observed.

Non-participant Observation

A research method where the observer does not engage with the participants, allowing for the study of behaviors and events in their natural setting without influence.

Independent Variable

A variable in research that is manipulated or changed to observe its effect on a dependent variable.

Experimental Group

The group in an experiment that receives the variable being tested, allowing researchers to measure the effect of the variable on this group.