How do you know there was a chemical reaction? Check all indicators below. A solid precipitate formed. The color changed. A gas was produced. The reaction absorbed or released heat.

How many oxygen atoms are in the following compound? 8 C120

Which condition would cause salinity of ocean water to decrease A. High rates of evaporation B. Freezing of glaciers C. Extremely hot weather D. A river flowing into the sea

Relationship between acceleration and free fall

Which of the following should be useful to show the percentage of total growth in plants exposed to various pollutants? A. line graph B. circle graph C. frequency table D. bar graph

Which of these is an example of the interactions between the ocean and the biosphere?

How does the overtone number relate to the standing wave pattern number

Which of the following statements about Em waves is true? A. Em waves all have the same speed B. Em waves all have the same wavelength C. Em waves only travel through water D. Em waves all have the same amount of energy

A teacher has asked four students to state a scientific theory. Which student is correct?

What are the two main currents that affect the US on the east and west coast?

What role do volcanoes play in the flow of energy and cycling of matter on earth?