Name two ways the properties of iron and oxygen are different from the compound iron oxide (rust).

Calculate the amount of heat needed to raise 1.0 kg of ice at - 20 degrees Celsius to steam at 120 degree Celsius

Magnetic poles that are alike a. attract each other. b. repel each other. c. do not interact. d. have the same shape.

When the total amount of a quantity is the same before and after some event occurs, we say that the quantity is (blank)

Which statement is true about wind energy? A) It is clean and non-polluting. B) It is only effective near water. C) It is costly and hard to produce. D) It is not as useful as fossil fuels.

During which two phases would surfer's most likely benefit A. New and Full Moon B. New moon and Waxing Crescent C. Full Moon and Waxing Gibbous D. 1st Quarter and 3rd Quarter

A rectangular block has dimensions 2.9 cm x 3.5 cm x 10.0 cm. the mass of the block is 615.0 g. what is the volume and density of the block? (answer it with correct numbers of significant figures)

Which of the following are products of cellular respiration? Sunlight Oxygen ATP Water Carbon Dioxide

Do magnetic field lines ever start or end anywhere?

What effect do oceans have on the temperature of coastal areas? A. Ocean breezes warm the coastal land constantly. B. Ocean currents always cool a coastline. C. Ocean winds prevent extremes of temperature on coastal lands. D.

Vf=vi+at solve for t