Heat generated by fossil fuels is, which causes climate change? A. Oxygen
B. Co2
C. Nitrogen
D. Hydrogen ​

After hydrogen and oxygen, witch element makes up almost all of the most common substance in your body

The health, management and conservation of biodiversity, is a challenge facing ecosystems worldwide. the major factors that affect the health and function of the great barrier reef are climate change and pollution. which question investigates the effects of a biotic factor on the reef ecosystem?

Which of these serves as a reference for comparison during a scientific investigation? a)outcome variable (dependent variable) b) test variable (independent variable) c)control group d)hypothesis