The correct answer is:
That’s because Earth is a solid mass, while the Sun is a gaseous globe.
The explanation:
when the Earth's geosphere -- the solid part of the Earth made up of the core, the mantle and the crust -- is primarily composed of only four. These four are iron, oxygen, silicon and magnesium. These elements make up more than 90 percent of the Earth's mass.
The Sun is a huge, glowing sphere of hot gas. Most of this gas is hydrogen (about 70%) and helium (about 28%). Carbon, nitrogen and oxygen make up 1.5% and the other 0.5% is made up of small amounts of many other elements such as neon, iron, silicon, magnesium and sulfur.
1. A teacher challenges.students to study moon phases to determine if what they have learned from the textbook is accurate. How might a student investigate claims made in a textbook that moo. phases occur in a 28-day cycle?
A. observe the phase of the moon each night until a full moon can be seen.
B. Compare the textbook phases to the actual moon phases seen in the night sky each night in 28 days periods over a three month time frame.
C. Compare diagrams of moon phases from the textbook to diagrams of moon phases on-line
D. Observe the moon phases seen in the night sky as often as possible over a six month period.
2. What causes the apperance of the moon change overtime?
A. The orbit of the Earth around the Moon and its distance from the sun.
B.The Moons position relative to the sun and earth as it revolves around sun.
C. the rotation of the moon on its axis
D. The distance of the moon to the sun
thank you
Constant acceleration.
Decreasing acceleration.
Increasing acceleration.
Moving backwards at constant speed.
Moving forward at constant speed.
Stationary.
Answer:
AB: decreasing acceleration
BC: constant acceleration
CD: constant acceleration.
Explanation:
(1) Here is the plot of velocity and time.
There is no information of distance.
=> There are two options that will be eliminated.
Moving backwards at constant speed.
Moving forward at constant speed.
(2) Only for remaining options will be considered:
Constant acceleration.
Decreasing acceleration.
Increasing acceleration.
Stationary.
(3) The formula for calculating final velocity:
v_final = v_initial + acceleration x time
Let's see BC: (this is a segment straight line)
v_C = v_B + acceleration x time
v_C = v _B = 40 (km/h)
time > 0
=> acceleration a = 0 (km/h^2) => constant acceleration
Let's see CD: (this is also a segment straight line)
v_D = v_C + acceleration x time
v_D = 0 (km/h)
v_C = 40 (km/h)
time > 0
=> acceleration = -40/time (km/h^2) < 0 => constant (negative) acceleration
Let's see AB (a segment straight line + a right curve)
On the segment straight line:
Using the same way we considered CD,
the acceleration is constant (positive) acceleration
On the right curve (with direction from A to B), its slope started to decrease. This slope is the change of acceleration.
=> Generally on AB (considering both segment straight line and the right curve), the acceleration is decreasing acceleration
P.S: Take the derivative of v_final with respect to acceleration a, plot a as a function of time , then you will see what really happened ^^.
Hope this helps!
The outside pressure forces the liquid up the straw and into your mouth. So, just by drinking through a straw, you can observe an important property of fluids. Fluids flow from areas of high pressure to areas of low pressure.
Your answer should be Cold Blooded Animals. Cold blooded animals don't have control over their own body temperature like humans or mammals do, most times cold blooded animals are reptiles, amphibians, etc. so they have to lay on rocks or someplace in the sunlight to warm up and have to go to water or shady areas to cool off. Hope this helps! =^-^=