Answer:
D
Explanation:
1.) The reaction is at dynamic equilibrium.
A: Nitrogen and hydrogen combine at the same rate that ammonia breaks down.
2.) Which statement about the reaction is necessarily correct?
A: Both calcium carbonate and sodium carbonate are being produced.
3.) Both calcium carbonate and sodium carbonate are being produced.
A: The reaction is reversible.
4.) What is the fastest motion that can be measured in any frame of reference?
A: 300,000 km/s
5.) Two people are on a train that is moving at 10 m/s north. They are walking 1 m/s south relative to the train. Relative to the ground, their motion is 9 m/s north.
Why are we able to use these motions to describe the motion relative to the ground?
A: The people are moving much slower than the speed of light so the ground acts as a frame of reference.
CRUST
The crust is the thinnest layer. It is the layer of the earth that we stand and walk on. It is more than 25 miles thick on land and 3 miles under an ocean.
MANTLE
The mantle is the layer directly below the crust. It is the thickest layer. It is divided into two parts the lithosphere and the asthenosphere. The lithosphere is at the top of the mantle, the asthenosphere is at the bottom. Together they make up the mantle.
OUTER CORE
The outer core is directly under the mantle and right above the inner core. the outer core is in a liquid state.
INNER CORE
The inner core is hotter than the surface of the sun. It also is made of solid iron and nickel.
<span>Higher incidence of cancers in humans and the contamination of crops and livestock.</span>
Answer:how long it took him to get there
Explanation:
The difference between a solid and a gas is that the particles are more conjoined together in a solid, when in a gas the particles are more spread out.