Thermal energy is heat transferred through conduction by direct contact.
A. True
B. False

In a popular classroom demonstration, solid sodium is added to liquid water and reacts to produce hydrogen gas and aqueous sodium hydroxide. part a write a balanced chemical equation for this reaction. express your answer as a chemical equation. identify all of the phases in your answer.

What are scientists who study fossils called? ( a ) astronomers. ( b ) biologists. ( c ) geologists. ( d ) paleontologists.

Which fossil fuel is mainly used for heating and cooking? a. electricity b. coal c. petroleum d. natural gas