A) Nuclear fusion B) Chemical reactions C) Nuclear fission D) Photosynthesis
A) Analysis of cloud patterns B) Oral traditions passed down through generations C) Palm reading D) Radiometric dating of rocks and meteorites
A) 10,000 years ago B) 500 million years ago C) About 4.6 billion years ago D) 1 billion years ago
A) Photosphere B) Troposphere C) Stratosphere D) Exosphere
A) Crust B) Outer core C) Inner core D) Mantle
A) Ptolemaic model B) Big Bang theory C) Steady State theory D) Nebular hypothesis
A) Radioactive decay B) Volcanic activity C) Tidal forces D) Solar radiation
A) Helium B) Carbon C) Hydrogen D) Oxygen
A) Mantle B) Crust C) Outer core D) Inner core |