Where do clouds form? Select three options.

at the ground

in the upper atmosphere

near the Earth's surface

where the air has very low humidity

where the atmosphere contains few particles

Two sealed 1 l containers full of gas are at room temperature. Container a has a pressure of 4 atm and container b has a pressure of 2 atm. What must be true about the number densities of the gases in these containers?

An object has a mass of 20 g and a volume of 5 cm3. what is the object's density? 4 g/cm3 100 g/cm3 0.25 g/cm3

What is some of the evidence for the speed at which glaciers are melting?

If you are traveling in a primary channel and you encounter a red and green marker (with the green band on top) when proceeding in an upstream direction, what must you do

How can energy change during a chemical reaction? a. transfer of heat and/or work b. increase in heat and/or destruction of matter c. change in the mass of the reactants or thermal energy d. increase or decrease in total energy of a system?

Acceleration is defined as the rate of change for which of the following? A. time B. velocity C. position D. displacement

What are 3 characteristics of a tornado?

Which list shows the element symbols of the 6 biological elements?

A space probe produces a radio signal pulse. If the pulse reaches Earth 12.3 seconds after it is emitted by the probe, what is the distance from the probe to Earth?

Do substances that heat up quickly have high or low specific heat capacity?