Though energy can change forms, the total amount of energy in the universe remains constant.

True or false

What is the relationship between variable x and variable y? As variable x increases, variable y increases. As variable x increases, variable y decreases. Both variables show a trend toward decreasing values.

Nina is researching a biome that has warm, humid summers; cold, long, and snowy winters; and at least four to six frost-free months each year. Which region is Nina studying?

What is the densist element on the periodic table

Which combustion equation violates the law of conservation of matter?

True of false The joints between the vertebrae allow slight movement because they are condyloid joints

When light from the sun warms the ground, the transfer of heat energy is called A) conduction. B) power. C) radiation. D) reflection.

What is alkyl hydrogen sulphate

What is the physical state of each of these materials at room temperature? a. gold b. gasoline c. oxygen d. neon e. olive oil f. sulfur g. mercury

What is one unexpected problem associated with cell phone use? A. It decreases the efficacy of your peripheral vision. B. It distracts your hearing from events on the roadway. C. It causes you to misjudge distances.

Construction crews sometimes use this reaction for welding underwater structures: Fe2O3 + 2Al → Al2O3 + 2Fe How many moles of iron (Fe) would be produced if 2.