Which of the following boxes represents a pure compound? A B C

Use the bond energies below to determine whether the following reaction is exothermic or endothermic: question physical science II.png

Which of the following is a correctly balanced equation?

Newton’s second law of motion tells us that the net force applied to an object equals its 

We can see each other in the classroom right now because we 

The planets never travel in a straight line as they orbit the Sun. According to Newton’s second law of motion, this must mean that

What does temperature measure?

How would you classify the following material? milk

Sodium, Na, atomic number 11, has only one valence electron. Upon losing this electron, what other atom in the periodic table does the sodium thus resemble?

Considering Einstein’s famous equation, E = mc 2, which of the following statements is true?