Why are naturally occurring substances, such as particulates or carbon dioxide, sometimes considered pollutants?

Which of the following is a part of a land based carbon cycle? coral reefs Crab shells Trees Whales

The mass % of C in methane CH4 is a) 74.87 b) 7.743 c) 133.6 d) 25.13 €) 92.26 159

Match the prefix with the power of ten it represents. 1. mega 10-2 2. kilo 103 3. hecto 10-3 4. deka 106 5. deci 10-1 6. centi 101 7. milli 10-6 8. micro 102

Which of the following is true? Covalent bonds are strong intermolecular forces. Covalent bonds are weak intramolecular forces. Covalent bonds are weak intermolecular forces. Covalent bonds are strong intramolecular forces.

Why is there a degrees sign for Celcius and Fahrenheit, but not for Kelvin? I understand that you don't actually say "degrees Kelvin" out loud, but I still don't really know why.

How many moles of MgS2O3 are in 201 g of the compound

What is the process of discovery that allows us to link abservations with actual facts? Science Inquiry Mathematics Repetition

Elastic energy is stored when an object is stretched. Is this an example of potential or kinetic energy? A. Neither B. Both d C. Kinetic O D. Potential Reset Selection

Round each figure to three significant figures

How long does it take earth to complete one rotation