Q: What is a worldwide increase in temperature called? ----

A: global warming

Q: Signs in many stores and restaurants warn that microwaves are in use. What is the main reason for this warning? ----

A: Some people have pacemakers that may be affected by microwaves.

Q: All living organisms are dependent on plants because plants ----

A: are producers

Q: A recycling plant manager needs to melt 1500 kg of scrap copper to sell to a wire manufacturer. The copper is at 15C and its melting point is 1083C. The copper has a specific heat of 385 J/kg x K. How much heat is required to raise the temperature of the copper to its melting point? ----
A: 6.2 x 10^8 J