how often r visited public library last year

quality of science & math educ in us is inadequate

scientists shld be allowed to do research animals' pain & injury

it is liquid at most temperatures on earth

what property of water is most important

which bodily features be best suited to a small animal living in a cold climate

air pressure beneath the wing is greater than that above the wing
pressure within the airplane is greater than that of the outside
engine power is greater than that of friction
the plane's wing is lighter than air

key factor that enables airplane to lift

do you see lightning before hearing thunder

why litmus paper doesn't change color in mixed solution

experiment about goldfish and temperature

yes, because there is plenty of ocean water
yes, because ocean water has many natural fertilizers
no, because ocean water is too salty for plants grown on land
no, because ocean water is much more polluted than rainwater

the wind in the desert blows sand against a rock
a glacier picks up boulders as it moves
a flood washes over a riverbank, and the water carries small soil particles downstream
an icy winter causes the pavement in a road to crack

they take in water and break it down into hydrogen and oxygen
using their gills, they take in oxygen that is dissolved in water
they get their oxygen from the food they eat
they come to the surface every few minutes to breathe air into their lungs

a greater gravitational force on the body

why short breath at the top of a mountain

average all of the weights that were recorded
average the highest and lowest weights recorded

which is the best method to report weight of leaf

which picture shows what she should use for the 2nd pot

if the number of fish in the fish bowl affects the behavior of the fish
if the temperature of the fish bowl affects the behavior of the fish
if the temperature and the amount of light affect the behavior of the fish
if the number of fish, the temperature, and the amount of light affect the behavior of the fish

what is scientist trying to find out from this experiment