Which of these is a chemical change

a / fire works eploding

b/grinding powder

c/iorning shirt

Fossil fuels are also known as__ This is a crossword btw

Choose the correct gas for each question below. Which greenhouse gas is produced by manure or decomposing waste in landfills? Which greenhouse gas is produced by bacteria in soil and water using nitrogen-rich fertilizer?

Which was a testable idea that J. J. Thomson developed through his experiments? Atoms are the most important substances in the universe. It is impossible to divide an atom into smaller parts. There are electrically neutral particles inside atoms.

This question is very hard and I'm having trouble with it

You are out in the bush and the only water available to drink is in a muddy waterhole. you have an empty bottle and a cup. how would you remove dirt from the muddy water so that you could drink the water?

Which consequence of new fishing methods had the most immediate impact on the environment? A. Diesel engines on newer ships contributed to global warming B. Increased reliance on fish in the American diet led to health problems C.

Which statement best describes the basis of the band theory of metallic bonding? a. Molecular orbitals overlap to form atomic orbitals in which the valence electrons of the atoms travel. b.

Which of the following is always valid? Choose only ONE answer. 1. W = - P ∫ dV, for the calculation of work in a mechanically-reversible piston-cylinder arrangement 2. For any fluid undergoing a change in pressure, Cp = dH/dT. 3. ΔH = ΔU + Δ (PV) 4.

Are kilograms heavy?

What is the molarity of a solution containing 55.8 g of MgCl2 dissolved in 1 L of solution?