how do you do this problem?
Which of the following is not a feature of sedimentary rocks?
ripple marks
porphyritic texture
stratification
concretions
Gold and diamond are not generally classified as rock-forming minerals because
neither is a silicate.
neither is common.
neither occurs in granite.
neither bubbles when exposed to acid.
Which of the following power sources is most efficient for producing electricity?
uranium
anthracite
wind
bituminous coal
A Foucault pendulum provides evidence of Earth's
rotation.
axial tilt.
parallax.
revolution.
All of the following methods of generating electricity involve a turbine except
burning coal.
nuclear fission.
solar cells.
water power.
Update:thank you so much for your help!
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Hannah,
The above answers are correct except for Q2: There are plenty of rock forming minerals that are not silicates, so this is not the reason. The reason is that they are so uncommon that their presence or absence in a rock is not considered a defining feature in categorizing the rock, thus they are not considered "rock forming minerals".
Q1.
Porphyritic texture is a texture found in volcanic rocks that indicates that the magma sat and cooled a bit below the Earth's surface. This is not found in sedimentary rocks.
Q2.
Neither are silicate. That is why we do not consider 'em to be rock forming mineral.
Q3.
Of course uranium... Browse the net, and find the output of different reactors.
Q4.
Rotation. The plane of swing appears to be shifting from a reference frame in earth, but it "is" fixed in respect to stars and other "mathematically still (they are so called, 'cause there motion is so minute from earth, they can be considered truly still.)" objects, according to the oscillation mechanics. So obviously earth rotates.
Q5.
Solar cell involves no turbine. Why and how? No comments :)
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