CHEMISTRY HIGH SCHOOL

The apparent westward movement of a planet against the background of stars is called ____. (1 point)retrograde motion
revolution
rotation
universal gravitation

Answers

Answer 1
Answer:

Answer:

retrograde motion  

Explanation:

All the planets have direct motion or progade motion i.e. they move in eastward direction around the Sun. The exceptions are Venus and Uranus which apparently move westwards. This is type of motion is known as retrograde motion. Venus and Uranus move opposite to the other planets motion against the background of stars.

Answer 2
Answer:

Answer:

retrograde motion

Explanation:

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A city planner needs a new method for cleaning a town’s water supply. He hires a scientist to research the issue. Because the scientist is being paid by the city planner, her research is not valid.True

False

Answers

False i am 87 % sure
false  

just because she is being paid by him does not mean anything unless the planner is cheating and or she has some reason to be inaccurate

How does the reaction affect oxygen atoms?

Answers

In the oxygen structure, all electrons are paired, thus, making oxygen dimagnetic. But actual experiments have shown that oxygen has paramagnetic properties. They are attracted to magnets. 

The oxygen atoms react according to the kind of reaction it undergoes. Mostly, O2 is present in combustion reactions. For example, combustion of carbon:

C + O2 ---> CO2

Fill in the Blank. 1. You want to be shielded from all three types of nuclear radiation. If you find shielding that blocks _________________ radiation, then it will most likely also block the other two types. 2. When nuclear radiation enters the tube of a Geiger counter, it ____________________ the atoms of the gas contained in the tube. 3. The particles that make up protons and neutrons and are thought to be basic units of matter are ____________________.

Answers

1.  If you find shielding that blocks gamma radiation,then it will most likely also block the other two types. (as the hardest radiation)
2. When nuclear radiation enters the tube of a Geiger counter, it the excited atoms of the gas contained in the tube. (this type deposits all energy into a single atom)
3 The particles that make up protons and neutrons and are thought to be basic units of matter are quarks.

How does a warm front form

Answers

A warm front occurs when a cold air mass retreats and is replaced by a warm air mass

Which of these statements best describes the similarity between the two events shown in the diagram?Select one:
a. Both may result in eclipses of the sun or moon.
b. Both may cause the moon's shadow to fall on Earth.
c. Both may cause Earth's shadow to fall on the moon.

Answers

Answer:

Both may result in eclipses of the sun or moon

Explanation:

Got it right on the test

Which of the following form solid solutions? Select all that apply.naturally occurring minerals
gases present in air
HCl and water
sugar and water
metal alloys

Answers

 I believe the answer is
naturally occurring minerals
metal alloys

The metal alloy is a solid solution that made of metal and other elements. 
The example of an alloy is bronze, which is made of copper mixed with nickel, aluminum, zinc or manganese. Most minerals should form a solid solution too, but not all of them.Gases present in air is not solid at all. A solution of HCl and sugar will not form solid solution either.

Answer:

naturally occurring minerals

metal alloys

Explanation:
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