Burning logs in the fire place produce heat energy. The dog gets warm from the fire when heat energy is transferred by A) the air. B) radiation. C) conduction. D) the flames.

What is the composition of the black powder in a firework?

Describe the relationship between the atomic number, mass number, number of protons, number of neutrons.

What are the ways genes are rearranged during meiosis

The nitrogenous bases cytosine and thymine are a. purines. b. a phosphate group. c. a sugar group. d. pyrimidines.

CH4 + 2O2 CO2 + 2H2O + Heat Which of the following statements about this reaction is true? A. The reaction consumes water. B. The reaction releases oxygen. C. The reaction releases heat. D. Heat is absorbed by the reaction.

Which sub-layer thins out into space, where there is no air

Complete and balance the molecular equation, including phases, for the reaction of aqueous ammonium bromide, nh4br, and aqueous lead (ii) acetate, pb (c2h3o2) 2.

A magnesium atom has 2 valence electrons in its third shell. Which is a TRUE statement about what happens when it forms an ion? A. It will be an anion. B. It will have more electrons than protons. C.

What scientific discoveries led to changes in Dalton's atomic theory?

What does berkelium react with