An atom has an atomic number of 12 and a mass number of 25. How many neutrons does the atom have?

12

13

25

37

Which observation supports the idea that light is made of particles?

List two major properties of most metals on the periodic table

Select the choice that describes neurons with the fastest conduction velocity for action potentials.

How many joules (J) are needed to increase the temperature of 10.0 g of lead (Pb) from 30 ˚C to 50 ˚C? (Cp for Pb = 0.128 J/g˚C) 25.6 J 38.4 J 64.0 J 102.4 J

The surface temperature on Venus may approach 737 K. What is this temperature in degrees Celsius? The temperature on Mercury may drop to - 265 °F at night. What is this temperature in degrees Celsius?

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?

Describe two ways that water moves through earthy atmosphere in the water cycle.