To understand the world we live in, we use mental models. What is the problem with mental models? (Select all that apply)

•They are personal

•They are incomplete

•They are idiosyncratic

•They are untestable

5 Deep water forms in the ocean when a. cold air decreases water density. b. warm air increases water density. C. rain falls into the ocean. d. salinity increases.

Most nonmetals are solids, but some are gaseous or liquid.

What is the ratio of hydrogen atoms to oxygen atoms in a water molecule?

Oh no! The thermometer punctured a hole in the bottom of the coffee cup, and water is spilling out. Check all actions you would take. Throw the broken pieces away. Use the punctured cup as the outside cup, not the inside cup.

A sample of pure iron has a mass of 5.00 g calculate its volume.

When you measure something in meters cubed, you are measuring

Low density: low pressure: high density Is which. evaporation? water vapor? condensation / liquid water

Which structures are found on sponges? pores medusae polyps stinging cells

Coefficients in a chemical equation are used to: balance the number of atoms on both sides of the equation ensure that all subscripts on both sides of the equation are the same indicate energy changes that occur during the reaction indicate the type

What determines your blood cholesterol level?