1.Most of the mass of an atom is a. Shared by electrons orbiting in circles b. S
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Question
1.Most of the mass of an atom is
a. Shared by electrons orbiting in circles
b. Spread out like evenly like jello
c. Concentrated in a small, dense center
d. Appearing and disappearing randomly
e. None of the above.
2.Walking through the desert, you look down and see a beautiful, hexagonal crystal. What information does that give you about its atoms?
a. Each atom is a hexagon
b. It must be made of identical atoms
c. The atoms are also arranged in a hexagon pattern.
d. Many atoms were naturally lost to turn a square crystal into a hexagon.
3.Consider two blocks that have the same size. A block of Styrofoam floats on water while a lead block of the same size lies submerged under the water. The buoyant force
a. is greatest on the lead.
b. is the greastest on the styrofoam
c. is the same for both.
d. cannot be compared.
4.Which of the following experiments provides evidence that water pressure increase with depth?
a. Ballons filled with air floaat on top of water
b. Water flows faster from a hole in the bottom of the cup then the top
c. Heavy objects sinnk to the bottom of a pool
d. Water spills out of the top of a container when an object is submerged in in
5. Which part of a river will feature slower moving water?
a. a wide, deep part.
b. a narrow, shallower part.
c. Water will flow at the same rate in all parts.
d. The only thing that matters is how steep the river is.
6. A parcel of warmed air rises due to
a. random molecular motion
b. radiation
c. increased energy of its molecules
d. buoyancy
13. If you continuously apply heat at a continuously apply heat at a constant rate to chunk of -17F ice, what will happen?
a.The temperature will increase indefinitely
b. The temperature will increase at constant rate without pause but the ice will melt at 32F
c. The temperature will increase at a constant rate but stop increasing at 32F until the ice is fully melted and then continue.
d. The temperature will increase at a constant rate until 32F where it will increase at a slower rate while the ice melts.
15.A volume of air that is compressed with no heat entering or leaving becomes
a. cooler.
b. remain unchanged.
c. warmer
d. none of the above.
16. The most disorderly arrangement of energy within matter is also
a. the least probable state of matter
b. the most probable state of matter
c. a matter of certainties, not probabilities.
d. none of the above
Explanation / Answer
1). Most of the mass of the atom is concentrated in the nuclues ....concentrated in a small dense centre.
2.) Atom are arranged in a hexagonal pattern.
3.)buoyant force is more in case of lead because it is submerged under water and displaced more amount of water than other.
4).water flows fast through a hole in the bottom than at a top of a cup.
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