Which of these is a chemical change

a / fire works eploding

b/grinding powder

c/iorning shirt

Regarding the area labeled D, which best describes the characteristics of the ocean current in this location? A. cold, high salinity, and less dense waters B. warm, low salinity, and less dense waters C. warm, high salinity, and dense waters D.

Explain why the population of trout might increase if the population of frogs decrease?

Complete combustion of 7.40 g of a hydrocarbon produced 23.8 g of co2 and 8.11 g of h2o. what is the empirical formula for the hydrocarbon?

What is the ionic formula for Na + and O-2

Which would result in radioactive decay? Check all that apply

A gene is a to a chromosome as (A) a pea is to a pod (B) a front to a back (C) a bike is to a car (D) a building is to a window

How are you enjoying this weather? (i need good reasons}

In today's experiment, some lab students let their chromatograms elute slightly longer than others. If one student's solvent front traveled to 9.80 cm, and another student's solvent front traveled 8.

What does squeezing do to the particles of snow or ice?

The strong nuclear force holds together which two particles in an atom? Electrons and neutrons Protons and electrons Neutrons and protons Neutrons and beta particles