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