One of the signs of a chemical reaction is taking place

What eats grass in a tundra

Which has not been a major source of CFCs

What skills enabled Galileo to interpret the results of his experiments

True or False, same substances have the same properties?

Which of the following are quantized? A) canned soup from the grocery store b) the weight of jelly beans c) elevation of a person on a ramp

A population of crabs live on a light-colored sandy beach. In this environment there is a population of birds that eat the crabs. One year, there is a volcanic eruption near the beach and dark volcanic ash covers the beach.

It would take one light year to travel to the sun? True or false?

A specific, electrically neutral atom of boron has 5 protons, 5 electrons, and 6 neutrons. what is the mass number of this atom of boron? 6 5 11 16

When does hail happen?

For the reaction, calculate how many moles of the product form when 0.012 mol of O2 completely reacts. Assume that there is more than enough of the other reactant. 4Al (s) + 3O2 (g) →2Al2O3 (s) Express your answer using two significant figures.