1) A student is investigating various types of matter based on a simplified
model created in science class. The student examines the salad
dressing bottle, noticing that the oily component and the vinegar
component have separated. The herbs are also distinctly visible in the
oil layer. How would the model help the student determine the
classification of matter for the salad dressing?
If the oily layer can be physically removed from the
vinegar, it must be a mixture. If the herbs can be
physically removed, it must be a solution.
If the oily layer can be physically removed from the
vinegar, it must be a pure substance. If the herbs can
be physically removed, it must be elemental.
B)
C)
If the oily layer can be physically removed from the
vinegar, it must be a pure substance. If the herbs can
be physically removed, it must be a compound.
D)
If the oily layer can be physically removed from the
vinegar, it must be a mixture. If the herbs can be
visibly seen in the midst of the dressing, it must be a
suspension

Aball tossed vertically upward from the ground next to a building passes the bottom of a window 1.8 s after being tossed and passes the top of the window 0.20 s later. the window is 2.0 m high from top to bottom. what was the ball's initial velocity? the unit vector j^ is directed upward. how far is the bottom of the window from the launch position? how high does the ball rise above the launch position?

Need asap ! what is the relationship between atmospheric pressure and the density of gas particles in an area of increasing pressure? (2 points) as air pressure in an area increases, the density of the gas particles in that area decreases. as air pressure in an area increases, the density of the gas particles in that area increases. as air pressure in an area increases, the density of the gas particles in that area remains constant. as air pressure in an area increases, the density of the gas particles in that area increases and decreases in an alternating pattern. 3. which of the following correctly describes a way in which earth's atmosphere interacts with the geosphere? (2 points) it contains gases that living organisms breathe. it contains gases that trap incoming solar radiation. it provides a medium for cycles that provide nutrients to living organisms. it provides a medium for water to move between earth's surface and the air. 4. which of the following is considered a drawback to using wind energy as a source of power? (2 points) wind energy is nonrenewable. wind energy produces large amounts of air pollution. 5. a meteorologist predicts that the weather in a region will soon change from clear skies to probable thunderstorms. prior to making this prediction, what did the meteorologist most likely observe on a barometer? (2 points) the barometer fell slightly. the barometer fell substantially. the barometer rose slightly. the barometer rose substantially. 6. which of the following do meteorologists not typically use weather balloons to record? (2 points) atmospheric pressure cloud types humidity temperature 7. during which step in the can crush lab did water vapor force air from the can? (2 points) the can was filled nearly to the top with water. the can was placed on the hot stove top burner for several minutes. the can was removed from the hot stove top burner. the can was placed upside-down in the water-filled pan.

One form of energy can be another type of energy. a. created to form b. transformed into c. destroyed and then created to form