Density another name for a mesh screen
magnet
tool that attracts objects that contain iron
filter
→
a physical property, for example, round, square,
rectangular or flat
sieve
a combination of two or more substances that
keep their individual identities
evaporation
process by which liquid changes slowly to a gas
solution
what an object that is less dense than water will
do when it is placed in water
mixture
a kind of mixture that has the same
composition throughout
float
object used to separate very small particles
from a mixture
physical
type of change that does not involve the
formation of a new kind of matter
shape
the amount of matter in a given object

In a laboratory experiment, a fermenting aqueous solution of glucose and yeast produces carbon dioxide gas and ethanol. the solution was heated by burning natural gas in a bunsen burner to distill the ethanol that formed in the flask. during the distillation, the ethanol evaporated and then condensed in the receiving flask. the flame of the burner was kept too close to the bottom of the flask and some of the glucose decomposed into a black carbon deposit on the inside of the flask. during this experiment the following changes occurred. which of these changes involved a physical change and not a chemical change? check all that apply. 1-condensation of ethanol 2-evaporation of ethanol 3- formation of carbon dioxide gas from glucose burning of natural gas 4-formation of ethanol from glucose by yeast 5-formation of a carbon deposit inside the flask

How does a scientist the government? a. the scientist tells people in society what to do. b. the scientist determines the policies that the government spends money on. c. the scientist provides unbiased information to the government. d. the scientist makes laws based on his or her research results.

3) in peaches, [oh]=3.16x10-11 m a) find [h+ ] b) what is the ph? c) is the solution acidic, basic, or neutral?