Explain why standard units of measurement are particularly important to scientists.

Ann propped up a graham cracker in a shallow bowl. She then set up an electric fan to blow on the graham cracker at three different speeds. what is anns dependent variable in this experiment?

Can dowels be chopsticks, since both of them are wood?

The cell theory was A. developed by Robert Hooke. B. developed before microscopes were invented. C. developed only after electron microscopes became widely used. D. developed by many scientists over many years.

Who is responsible for the general theory of relativity?

At constant pressure, 492 mL of a gas at 31.00C is heated and the volume expands to 876mL. What is the new temperature in Kelvin? A) 171 K B) 291 K C) 328 K D) 541 K

Air is transferred from a 75 L tank where the pressure is 125 psi and the temperture is 288 k to a tire with a volume of 6.1 L and a pressure of 25 psi. What is the new temperture.

Which of the following is a measure of randomness in a system? A) entropy. B) kinetic energy. C) potential energy. D) chemical energy.

What substance can be broken down by chemical means? A) ammonia B) aluminum C) antimony D) argon (Castle learning question)

How the law of conservation of mass could be useful for investigating chemical changes

A covalent chemical bond is one in which outer-shell electrons of two atoms are shared so as to satisfactorily fill the outer electron shells of both atoms. protons and neutrons are shared by two atoms so as to satisfy the requirements of both atoms.