What type of rock is created when lava cools and hardens?

Hands moving on a battery-operated clock is an example of what kind of energy conversion? A. Kinetic energy being converted to chemical potential energy B. Gravitational potential energy being converted to heat energy C.

How can the periodic table predict properties of elements?

Select the correct answer. The presence of which phenomenon proved the predictability of the big bang theory? O A. death of large, ancient stars B. cosmic microwave background (CMB) O c. formation of the Orion nebula D.

Describe a neutralization reaction and give its two products

A Block has a volume of 0.09 m³ and a density of 4000 kg/m³. what's the force of gravity acting on the block in water

Suppose you wanted to change the rate of a chemical reaction. what might you change in the reaction? explain the factor

Carbon-13 is an isotope of carbon. The atomic number of carbon is 6. How many neutrons does carbon-13 have?

What is the basic building block of matter to a chemist

Between magnesium and calcium, which has the highest ionization energy, and why?

approximately how many different cells can be found in a human cell? A. less than one hundred B. less than 10 C. more than a million D. more than one thousand