The air above earth's surface is at different temperatures. What is responsible for this difference in temperature?

the moon

the sun

landforms

earth's rotation

The standard metric unit of mass is the

If a person's eardrum perceives a sound with a high pitch what can be predicted about the wavelength of the sound wave? The wavelength is double the pitch. The wavelength must be short. The wavelength must be long.

What happens to glucose or galactose when the cu2 + in benedict's reagent is reduced?

The rate of a reaction can be observed by measuring the change in the amount of a reactant over time, as given in the graph below. How does the rate of a reaction change with time and how does the collision theory explain this change?

Which of these is a chemical property? A. Mercury is a dense liquid. B. Iodine vapor has a purple color. C. Aluminum is a very conductive metal. D. Ice melts at 0°C. E. Iron rusts in wet weather.

The temperature program for a separation starts at a temperature of 50 °C and ramps the temperature up to 270 °C at a rate of 10 °C/minute.

Why are scientific explanations subject to change? A) Scientists always need better technology. B) Scientific explanations are only a best guess. C) New scientific explanations are always better than old explanations.

The solid above sink to the bottom when you put a container filled with it what does that tell you about density

What has more mass a whole sponge or that same sponge broken into tiny pieces

Calculate the [H3O+] of solutions a and b; calculate the [OH-] solutions c and d. 9. pH = 2.76 10. pH = 3.65 11. pOH = 3.65 12. POH = 6.87