Answer: Orbital Motion Unit Test
1. A line between a planet and the sun sweeps out two equal areas at different places as it moves along its orbit. Which factor remains constant as this happens?
Answer: The time required to sweep out the areas.
2. Which are features of Copernicus's model of the solar system? Select three correct answers.
Answers: The sun is at the center.
The planets move in perfect circles.
The stars are fixed to an outer sphere.
3. An asteroid approaches Jupiter and is slung around around into a new trajectory across the solar system. Which of the following are possible? Select three correct answers.
Answers: The asteroid spirals into the sun.
The asteroid continues out of the solar system.
The asteroid enters a stable elliptical orbit around the Sun.
4. A satellite orbiting the Earth at an orbital radius r has a velocity v. Which represents the velocity if the satellite is moved to an orbital radius of 5r?
Answer: 1/√5 v
5. Which did Kepler notice about planetary motion that caused him to propose Kepler's first law of orbital motion?
Answer: The distance to the Sun varies.
6. Which statements about the geocentric model are false? Select two correct answers?
Answers: It explains why Mars appears to move backward for a few months approximately every two years.
It shows the Sun at the center of the solar system.
7. The mass of an object doubles. What happens to the gravitational force between it and another object whose mass stays the same, assuming they remain the same distance apart?
Answer: The amount of the gravitational force doubles.
8. What shape is the moon's orbit around Earth?
Answer: An ellipse that is almost circular.
9. Which of the following statements about Newton's theory of universal gravitation are true? Select the three correct answers?
Answers: The theory applies to all objects in the universe.
Gravitational force increases as the distance between objects decreases.
Gravitational force increases as the mass of objects increases.
10. Which form of Kepler's third law can you use to relate the period T and radius r of a planet in our solar system as long as the unit year is used for the period and astronomical unit is used for the radius?
Answer: T²= r³
11. Based on Kepler's observations about planetary motion, what is the relationship between a planet's orbital velocity and its distance from the Sun?
Answer: The greater the distance, the slower the orbital velocity
12: For a moon orbiting its planet, rp is the shortest distance between the moon and its planet and ra is the longest distance between the moon and its planet. What is a moon's orbital eccentricity if rp is equal to 0.27ra?
Answer: 0.57
Explanation:
Sorry I didn't do the short answer questions but these are all the correct answers to the science unit test.
The statements about the geocentric model that are false include:
B. It explains why Mars appears to move backward for a few months approximately every two years.C. It shows the Sun at the center of the solar system.The geometric model also refers to geocentrism. It refers to a theory of the solar system that's based on the fact that the Earth is at the center. It's the description of the universe with the Earth at the center.
Therefore, it shows the Earth at the center of the solar system and it shows that the orbits of the planets as circular. It doesn't explain why Mars appears to move backward for a few months approximately every two years. It also doesn't show that the Sun is at the center of the solar system.
In conclusion, the correct options are B and C.
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someone please please help me with this I would really appreciate it with a explanation ! (No links )
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Answer:
a
Explanation:
they have the same amino acid sequence
Answer:
correct answer is A macaque and baboon
Explanation:
wash the food using _____ as soon as you are finished using it to prevent food particles from sticking to it
Answer:
I guess you meant wash the utensils instead of food.
Answer: using water & soap.
I need help I will mark brainliest
Can someone give me the step by step answer
Answer
68.6 m
Explanation:
Given-
Mass = 0.5 kgPotential energy = 34.3 JTo find -
Height of the tree upto which the squirrel climbed.
Solution-
Potential energy of a body = mgh
34.3 = 0.5×h (mg = 0.5kg)
h = 34.3/0.5
= 68.6 m
Option third.
ipt Which is one way that carbon returns to the atmosphere during slow-track carbon recycling?
O A. Green plants release carbon dioxide into the atmosphere when they perform photosynthesis.
OB. Humans release carbon dioxide into the atmosphere when they burn fossil fuels.
O C. Bacteria release carbon dioxide into the atmosphere when they break down dead plants.
OD. Animals release carbon dioxide into the atmosphere when they eat plants.
Answer:
Bacteria release carbon dioxide into the atmosphere when they break down dead plants.
What is biology and why is it an important subject to study?
Answer:
Biology is the study of life, bio meaning life and logy meaning study.
Explanation:
It is an important subject to study because it teaches you about life and how it works.
( please help) What type of mutation is shown in the diagram above?
A. Inversion
B. Insertion
C. Deletion
D. Point
Answer:
D.
Explanation:
I think it may be point because only one section is changing.
Please help me with this
Answer:
Water and dissolved minerals move through xylem.
Xylem contains specialized cells.
Vessel elements are short and wide tracheid cells are long and narrow.
Xylem cells die at maturity.
Explanation:
HELPPP PLEASE
When does the Summer and Winter Solstice happen in each hemisphere?
June (Northern Hemisphere)
June (Southern Hemisphere)
III
December (Northern Hemisphere)
December (Southern Hemisphere)
:: Summer Solstice in the Northern Hemisphere
:: Winter Solstice in the Southern Hemisphere
Summer Solstice in the Southern Hemisphere
:: Winter Solstice in the Northern Hemisphere
What are other consequences of wolf introduction that have been good for the humans in Yellowstone National Park?
Answer:
New research shows that by reducing populations and thinning out weak and sick animals, wolves have a role in creating resilient elk herds. Wolves and black-billed magpies scavenge at a dump where carcasses are stored in Yellowstone National Park.
Explanation:
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E. coli is normally found in the human digestive system to assist with the digestion and absorption of certain nutrients. However there is a pathogenic version of E. coli found in ground beef that has caused sickness periodically. What step can a person take to prevent getting infected during an outbreak?
a. Rely upon the fact that they have never had food poisoning.
b. Participate in an antibiotic preventative treatment to kill any current E. coli symptoms.
c. Monitor where the contaminated beef was found and avoid using it for meals
d. Ignore the concerns and drink large amounts of acidic juices when eating burgers.
Answer:
d
Explanation:
From the early 1700s to the modern day, how did various lines of evidence refine scientists’ understanding about the ancestry of Cetaceans?
a. Anatomy
b. Fossils
c. Embryological development
d. DNA (including amino acid sequences)
The various lines of evidence refine scientists’ understanding of the ancestry of Cetaceans by Fossils. So, the correct option is B.
What do you mean by Fossils?Fossils may be defined as the preserved remains, or traces of remains, of ancient organisms. It is the dead and organic remains of past organisms.
To estimate the ancestry of Cetaceans, which are categorized under marine mammals, scientists need to study their fossils, if possible. Because fossils reveal the evolutionary history in a better way.
Therefore, the various lines of evidence refine scientists’ understanding of the ancestry of Cetaceans by Fossils.
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What conditions might cause the most water and sediment to be collected at the bottom of the stream table?
Answer:
Silent stream having uniform velocity cause the most water and sediment to be collected at the bottom of the stream table
Explanation:
A silent stream having uniform velocity allows the sand, soil, mud and dust in it to settle down and continuously flowing through various terrains (as governed by the law of precipitation).
If the stream water is moving at high speed and there is lot turbulence then the suspended particles in it will never settle.
A roller coaster car is at the top of a 72 m hill and weighs 966 N. What is the coasters potential energy?
Answer:
Calculate it. PE= Fwh = (72 m) (966 N) = 69552 Joules 7.
Explanation:
a hydrological imbalance caused by a period of abnormally dry weather is known as a drought for farmers the longer this imbalance lasts the greater the risk their crops fail how might a drought become a problem for food consumers
AnsWhat is a drought? A drought is defined as "a period of abnormally dry weather sufficiently prolonged for the lack of water to cause serious hydrologic imbalance in the affected area." -Glossary of Meteorology (1959).wer:
Explanation:
Answer: They will pay higher prices for crops affected by drought.
Explanation: I took the USA Test Prep assignment and that was right soooo yeah.
HELP PLEASE I WILL GIVE YOU THE BRAINLIEST
Answer:
rain, steep, agriculture, ?, keep
Explanation:
3’ TGAGCTGCGCA 5’
Which mRNA strand is complementary to the one shown above?
a. 5’ TGTAGCTGCGCT 3’
b. 5’ TCTCGTATGCGU 3’
c. 5’ ACATCGACGCGT 3’
d. 5’ ACUCGACGCGU 3’
Answer:
letter. D . 5' ACUCGACGCGU 3'
you can find it when you look at the decoding genetic code too.
The mRNA strand that is complementary to the one shown above is 5’ ACUCGACGCGU 3’.
What is a complementary strand?Complementary strand is a strand that is opposite of a template strand.
During transcription, mRNA strand is synthesized from a DNA template. The following applies during transcription:
Adenine pairs with UracilGuanine pairs with CytosineTherefore, the mRNA strand that is complementary to the one shown above is 5’ ACUCGACGCGU 3’.
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Last Saturday my game was rained out. This is an example of what affecting your life?
A) Climate
B) Ozone
C) Weather
D) Temperature
Answer:
A
Explanation:
It is A because rain is a type of weather and because it rained you couldn't go to your game.
hope this helped :))))
Answer:
c. weather.
Explanation:
the rainy weather ruined your day.
Give two possible effects of an increase in global air temperature on living organisms
[2 marks]
Answer:
Heat waves can be dangerou, causing illnesses such as heat cramps and heat stroke, or even death. Warmer temperatures can also lead to a chain reaction of other changes around the world. That’s becuase increasing air temperatures also affects the ocean, weather patterns, snow, ice, and plants and also animals.
Explanation:
hope this help you
The two possible effects of an increase in global air temperature on living organisms are as follows:
It destructs the habitat of the aquatic ecosystem. It creates a serious cause of numerous diseases like heat stroke, heat cramps, etc. What are the causes behind increasing the global air temperature?The causes behind increasing the global air temperature are as follows:
Cutting down trees due to urbanization and industrialization. Excessive usage of carbon-based fuels. Liberation of greenhouse gases in the atmosphere.An increase in global air temperature almost affects each organism on the earth's surface. Plants are also threatened by the loss of water through stomatal pores. Due to high air temperature, the temperature of rivers, seas, oceans, ponds, etc also increases. As a result of this, the organisms living in those regions have been impacted a lot.
Therefore, the two possible effects of an increase in global air temperature on living organisms are well described above.
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When a dead organism brakes down, _____________ is released.
A. carbon
B. oxygen
Answer:
carbon
Explanation:
i hope this helped ;)
Viruses have structures that allow them to inject their genetic material directly into the DNA of the host cell. This strategy benefits the virus in that –
Answer:
Most time they replicate and after they replicate enough they break the cell and move into another cell. They also have more chances of being spread to another person
Explanation:
1. What forces cool moist air from the oceans to rise as it moves towards land? *
(1 Point)
O
Prevailing winds
Mountain ranges
Seasonal winds
Answer:
Seasonal Winds
Explanation:
as the air warms it causes the sea levels to rise and as air cools it moves land towards the sea
earth is divided into large geographic regions or which are based on differences in climate
A model of how DNA is organized to form genes is shown here. What likely explains how DNA within a single gene can cr
multiple phenotypes within the same organism that contains the same genome in each cell?
Answer:
Differential splicing of exons after intro removal can produce multiple phenotypes. Differential timing of when genes are expressed can produce different phenotypes.
Explanation:
Differential splicing of exons after intro removal can produce multiple phenotypes. Differential timing of when genes are expressed can produce different phenotypes.
Answer:
The answers from the other person are correct.
B. Differential splicing of exons after intro removal can produce multiple phenotypes.
D. Differential timing of when genes are expressed can produce different phenotypes.
Explanation:
What are the abiotic factors the characterize a forest ecosystem
Answer:
The most important abiotic feature of a forest ecosystem may not be obvious, despite its ubiquity and importance: sunlight. Tangible abiotic factors include soil, minerals, rocks and water. But abiotic factors can be intangible, such as temperature, other types of radiation and the chemistry of soil and water.
Explanation:
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Answer:
B is the correct answer. :)
PLEASE HELP ME also its actually science
A female firefly responds to signals flashed by a male firefly. What are these fireflies participating in?
A courtship
B hibernation
C migration
D defense
Answer: I think it’s A
Explanation: the male is trying to attract the female for mating
Which of the following exists as a single, self-supporting cell that travels using numerous hairlike cilia?
OA. Amoeba
OB. Euglena
OC. paramecium
OD. Volvox
Answer:
amoeba i think i might be wrong
Explanation:
Answer:
OC
Explanation:
Structure - Single self-supporting cell
Moves - Using celia (numerous, short hair-like structure)
Food - Consumer: draws food into a mouth-like opening lined with cilia
Reproduction - Both sexually and asexually. Can reproduce asexually two or three times a day.
How many kingdoms are there in the domain Eukarya? O A. 1 O B.2 O c. 4 O D. 3
Answer:
There are 4 kingdoms
There are currently four kingdoms in the domain named Eukarya. The correct option is c.
What is domain?In biological classification, a domain is a taxonomic category above the kingdom level. Bacteria, Archaea, and Eukarya are the three domains of life.
These domains are defined by differences in cell structure, biochemistry, and other characteristics of the organisms that inhabit them.
Bacteria and Archaea are both prokaryotic domains, whereas Eukarya is a eukaryotic organism domain that includes animals, plants, fungi, and protists.
In biology, a kingdom is a taxonomic rank made up of smaller groups known as phyla (or divisions, in plants).
Historically, the highest taxonomic rank, or the most general taxon used in classifying organisms, is kingdom.
Animalia, Plantae, Fungi, and Protista are the current kingdoms in the domain Eukarya.
Thus, the correct option is c.
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