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August 22, 2014

Homework Help: Science

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Recent Science Questions

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science gr.8
1) Why would scientists be looking at a species to see if it was actually more than one species? 2) How can discovering this new species of dolphin help the Australian government protect all its dolphins? Article Summary: The article which these questions are from is about a ...
Saturday, December 28, 2013 at 3:17pm

Science
What stage involves histone acetylation, in which the negative charges of the lysines are neutralized so that the histone tails no longer bind to the neighboring nucleosomes? Primary transcription?
Saturday, December 28, 2013 at 11:20am

Science
Consider a wetland ecosystem. In this ecosystem are two species: a small fish species and a wading bird species that feeds on the small fish as its main source of food. Oxygen levels are a limiting factor. Suppose that the local temperature changes in favor of greater oxygen ...
Friday, December 27, 2013 at 9:49pm

Science
Consider a wetland ecosystem. In this ecosystem are two species: a small fish species and a wading bird species that feeds on the small fish as its main source of food. Oxygen levels are a limiting factor. Suppose that the local temperature changes in favor of greater oxygen ...
Friday, December 27, 2013 at 7:25pm

Science
In the western U.S., ranchers aggressively killed wolves because they posed a threat to their cattle. As the wolf population declined, the deer population began increasing. As a result, the surrounding forest ecosystems experienced increasing damage. The large number of deer ...
Friday, December 27, 2013 at 5:15pm

Science
If Changing conditions lead to the decreased ocygen levels in the stream the carrying capacity of the stream for the trout will decreace oxygen levels in water is therefore a ________ with respect to the number of trout that a particular stream can support. Fill in the blank ...
Friday, December 27, 2013 at 4:55pm

Science
Which of the following statements correctly states how human activity and biodiversity affect one another? · As humans develop land for homes and industry, biodiversity increases. · As humans restrict fishing and oil drilling, biodiversity decreases. · As ...
Friday, December 27, 2013 at 4:51pm

Science
If Changing conditions lead to the decreased ocygen levels in the stream the carrying capacity of the stream for the trout will decreace oxygen levels in water is therefore a ________ with respect to the number of trout that a particular stream can support. Fill in the blank ...
Friday, December 27, 2013 at 4:47pm

Science
Which of the following is a behavioral adaptation of a spider? · poisonous venom · web spinning · eight legs · body color my answer is web spinning
Friday, December 27, 2013 at 4:46pm

Science
disturbance of an ecosystem by human activity often has negative effects on the number of species which is a measure of its ___________.?
Friday, December 27, 2013 at 4:36pm

Science
Which of the following statements correctly states how human activity and biodiversity affect one another. · As humans develop land for homes and industry, biodiversity increases. · As humans restrict fishing and oil drilling, biodiversity decreases. · As ...
Friday, December 27, 2013 at 4:05pm

Science
Which of the following is a behavioral adaptation of a spider? · poisonous venom · web spinning · eight legs · body color my answer is web spinning
Friday, December 27, 2013 at 3:32pm

Science
Adult birds of one species hatched eggs of another species along with their own eggs, and raised all of the babies together. The foster chicks use a different warning cry than the other chicks. What can you infer about this warning cry. · It results from instinct. &...
Friday, December 27, 2013 at 3:26pm

Science
Two species have a relationship with one another in an ecosystem. Suppose one of these two species goes extinct. Which type of relationship did the two have if the surviving species population increases after the other goes extinct? · The extinct species was a parasite ...
Friday, December 27, 2013 at 2:42pm

Science
Which of the following organisms only has behavioral controls available to maintain its body temperature? gray wolf hummingbird polar bear tree frog
Friday, December 27, 2013 at 12:34pm

Science
A biologist made population counts of four different species of animals in an ecosystem. What can you infer from these numbers about possible predator-prey relationships between the species? Species A 155 Species B 17 Species C 2,467 Species D 19 · Species A could be a ...
Friday, December 27, 2013 at 10:55am

Science
A nonnative species of animal is introduced into a healthy ecosystem. In its new environment, this species has no predators, although it preys on several native animals in the ecosystem. Make a prediction about the biodiversity and health of this ecosystem in the future. &...
Thursday, December 26, 2013 at 6:56pm

Science
A biologist studying a desert ecosystem observes that the population of a lizard species increases following a particularly hot, dry period that causes a snake population to decline. What could the biologist hypothesize about the roles of these two species? · The lizard...
Thursday, December 26, 2013 at 6:17pm

Science
Which of the following could be true of two different species that have a competitive relationship in the same ecosystem? · One species preys on the other. · The relationship is mutually beneficial. · They share the same niche. · One species ...
Thursday, December 26, 2013 at 6:01pm

Science
Which of the following could be true of two different species that have a competitive relationship in the same ecosystem? · One species preys on the other. · The relationship is mutually beneficial. · They share the same niche. · One species ...
Thursday, December 26, 2013 at 1:31pm

science
the total energy in an L-c-circuit converts from electrical to magnetic in 2uS calculate the frenqency of L-C-Oscillation answer
Thursday, December 26, 2013 at 12:34pm

math
A science teacher has a supply of 50% sugar solution and a supply of 80% sugar solution. How much of each solution should the teacher mix together to get 105 ML of 60% sugar solution for an experiment 70 ML of the 50% solution and 35 ML of the 80% solution 35 ML of the 50% ...
Tuesday, December 24, 2013 at 3:03pm

Science
1. Why is California’s high-speed rail such a groundbreaking effort? 2. Why will it take so long to complete the high-speed rail route? 3.Should other states wait to see if the high-speed rail system works well before starting their own plans for similar systems? Could ...
Monday, December 23, 2013 at 6:26pm

Math
Raul did an inventory of all the books in collection by subject. He displayed his results in the table below . Use the table to solve to solve each problem. Raul's book Collectio Subject of book. Number of books History. 72 Art 81 Science. 54 Travel. 63 Fiction. 90 ...
Sunday, December 22, 2013 at 5:20pm

Science
suppose that a population of skunks lives on an isolated island is 500 skunks are present today and the birth rate is 65 per week and the death is 47 per week how many skunks to you predict will be on the island 105 days from now and what would a graph population versus time ...
Sunday, December 22, 2013 at 4:41pm

Environmental Science
A nuclear burning power plant produces a total power of 1.1kW. It serves a community that requires 2.85 x 107 kJ of power over the entire year. How many days per year does the power plant need to operate to provide all this power? 300 days 250 days 365 days 200 days 150 days
Sunday, December 22, 2013 at 3:33pm

Vikings & SECME
What were the Vikings known for? Were they good in science, engeniring, computers,or mathematics, etc.?
Sunday, December 22, 2013 at 12:43pm

Computer science
Paying Off Credit Card Debt Each month, a credit card statement will come with the option for you to pay a minimum amount of your charge, usually 2% of the balance due. However, the credit card company earns money by charging interest on the balance that you don't pay. So ...
Sunday, December 22, 2013 at 10:06am

Math
Practice Dividing by 9 A Jeweler placed 20 necklaces on 5 different tables. He placed the same number of necklaces on each table . How many necklaces did the jeweler place on each? Raul's book collection Subject of book. Number of books History. 72 Art. 81 Science. 54 ...
Saturday, December 21, 2013 at 9:34am

science(please check answers)
1.which of the following were found to destroy ozone in the upper atmosphere? A. sulfur oxides B. cfcs(i pick this) C. nitrogen oxides D. carbon dioxide 2.which of the following sets of terms is associated with air pollution caused by burning fossil fuels? A. acid rain,ozone ...
Friday, December 20, 2013 at 10:56am

science help needed quick fools
how do the circulatory and endocrine systems work together to help maintain homeostasis
Friday, December 20, 2013 at 9:50am

Science
Explain how an increase in agricultural activity might affect a local fishery.
Thursday, December 19, 2013 at 11:27pm

Science
Design an experiment to determine what level of a new synthetic insect killer called Beegone is lethal to geraniums.
Thursday, December 19, 2013 at 11:09pm

Science
A persistent organic pollutant is estimated to have a half-life of 30y. If 3 tonnes of the chemical exists in a polluted area today, how much of the chemical will remain after 120y.
Thursday, December 19, 2013 at 9:59pm

Science
How do you do a double conversions and metric measurements? 32km/hr > m/s Like how do you convert that?
Thursday, December 19, 2013 at 6:47pm

science sybiotic relationships
What is a commensalism relationship for a Baltimore Checkerspot Butterfly? Please help by 7:00
Thursday, December 19, 2013 at 6:24pm

Science (Help, please!)
"Toy Car A" is propelled by elastic force. The other forces acting on the car are gravity (pulling the car down) and friction force (between the car and the floor). What UNBALANCED forces are acting on the car? "Toy Car B" is propelled by air resistance. ...
Thursday, December 19, 2013 at 10:17am

science
Describe how the Triassic period was a transitional time period during the Mesozoic era. Explain why the boundary between the Triassic and Jurassic periods is similar to the boundary between the Permian and Triassic periods.
Thursday, December 19, 2013 at 9:26am

science
2. Describe the two most important events in the history of animal life that occurred at the beginning and at the end of the Paleozoic era. List and briefly outline the six different periods into which the Paleozoic era is divided. so i cannot find it in my notes, and im ...
Thursday, December 19, 2013 at 9:13am

Science (Balanced/Unbalanced Forces)
"Toy Car A" is propelled by elastic force. The other forces acting on the car are gravity (pulling the car down) and friction force (between the car and the floor). What UNBALANCED forces are acting on the car? "Toy Car B" is propelled by air resistance. ...
Thursday, December 19, 2013 at 12:52am

science
At exactly 2:00 pm, Speedy the Snail crawls onto a meter stick at the 10 cm mark. If he reaches the 65 cm mark at exactly 2:10 pm, what is his speed? Answer: 65 cm - 10 cm = 55 cm ÷ 10 min = 5.5 cm/min
Wednesday, December 18, 2013 at 11:47pm

Science :)
1. Forests and fisheries are examples of abiotic factors. energy factors. renewable resources. nonrenewable resources. 2. How has the human population changed during the last 50 years? The human population has increased exponentially. The human population has decreased ...
Wednesday, December 18, 2013 at 8:32pm

science
Define the geological time scale and explain why geologists use it to show Earths History.
Wednesday, December 18, 2013 at 12:40pm

Science
Explain how gravitational, electrical and magnetic force act on a maglev train??? Please help I need to know please!!!! before tomorrow please
Wednesday, December 18, 2013 at 11:38am

science
Which of the following vertebrates had the chance to become abundant after the dinosaurs became excintct ?
Wednesday, December 18, 2013 at 8:35am

science
Earth's atmosphere,oceans, and continents began to form during the first several hundred million years a) Precambrian time b) the Paleozoic era c) the Mesozoic era d) the Cenozoic era
Wednesday, December 18, 2013 at 8:34am

Science
Goldie goldfish a speed swimmer loves to race around the parks poud which is .5 miles around. If she can swim 20 laps around the track in 2 hours, what is her average speed?
Wednesday, December 18, 2013 at 7:32am

Science
No gross pus or purulent discharge was or were noted at the old incision site. Should this be was or were? I think it should be was.
Wednesday, December 18, 2013 at 1:32am

Science
I'm supposed to fill in a table. The angle of incedence in air is given (starting with zero degrees and then at 10, 20, 30, 40, 50 and 60 degrees. Using the sin function on my calculator, I'm supposed to figure out the angle of refraction in an acrylic block. Can ...
Tuesday, December 17, 2013 at 7:54pm

Science (Mars rovers)
What were some of the differences between spirits , opportunity,and curiosity's tools .
Tuesday, December 17, 2013 at 6:07pm

science
whats conditioning in science
Tuesday, December 17, 2013 at 5:16pm

Science
two nonmetals from group 16 are likely to form a
Tuesday, December 17, 2013 at 4:58pm

Science
What are the reason why Global Warming is destroying our environment? And what causes Global Warming?
Tuesday, December 17, 2013 at 4:30pm

science
why is Denver Colorado weather different then western new York?
Tuesday, December 17, 2013 at 4:24pm

Science question
for my science project I have to chose a planet that I would like to visit. I choose "Venus." I know it's not possible to travel to Venus, but I don't believe man has visited in other planet in our solar system, besides the moon. and the moon isn't really...
Tuesday, December 17, 2013 at 3:35pm

Physical science
Two balls collide head-on on a table. The first ball has a mass of 0.50 kg and an initial velocity of 12.0 m/s. The second ball has a mass of 0.75 kg and an initial velocity of -16.0 m/s. After the collision, the first ball travels at a velocity of -21.6 m/s. What is the ...
Tuesday, December 17, 2013 at 3:25pm

science help!!!!
Disturbance of an ecosystem by human activity often has negative effects on the number of species, which is a measure of its __________________.
Tuesday, December 17, 2013 at 1:44pm

science
If changing conditions lead to decreased oxygen levels in the stream, the carrying capacity of the stream for the trout will decrease. Oxygen level in water is therefore a(n) _____________ with respect to the number of trout that a particular stream can support
Tuesday, December 17, 2013 at 1:18pm

science
Explain why a chemical with a long-half life may create problems in the environment?
Monday, December 16, 2013 at 10:58pm

Science
What if the orange fish had been best camouflaged, so that a few green fish were eaten each generation?
Monday, December 16, 2013 at 10:32pm

Science
Real population change much slowly than these toothpick fish. Explain why?
Monday, December 16, 2013 at 10:29pm

Science
If the fish from a particular stream have become genetically adapted to their home stream over many generations, what might happen if their fertilized eggs are used to "restock" a different stream that has become depleted of fish?
Monday, December 16, 2013 at 10:07pm

science
What is the formula for mass and volume when dealing with density??
Monday, December 16, 2013 at 9:16pm

7th grade science
a textbook has 2,000 g mass/ 4,000 cm to the 3rd pwr what is the density how do you figure this out I went home sick today and this is the homework I missed in class today. Can anybody tell me how to do this I have a work sheet on how to figure mass density and volume. Its due...
Monday, December 16, 2013 at 9:10pm

science(check answers again)
1. carrying capacity is the maximum number of (blank)that an ecosystem can support A. different species B. individuals in a population C. habitats(I PICKED THIS) D. limiting factors 4. Complete the following sentence with the best phrase below removing just one species from an...
Monday, December 16, 2013 at 7:14pm

science plz help right now!!!!
check my answers please 1. carrying capacity is the maximum number of (blank)that an ecosystem can support A. different species B. individuals in a population C. habitats D. limiting factors (i picked) 2. In an island ecosystem a species of beetle feeds on the leaves of a ...
Monday, December 16, 2013 at 6:42pm

Science
One light year is about 9 trillion kilometers. Arcturus is a star that is 37 light years from Earth. If you are about 11 years old now, how old will you be when light that is leaving Arcturus today reached Earth? How far, in kilometers, will it have traveled? please explain ...
Monday, December 16, 2013 at 6:36pm

science
If changing conditions lead to decreased oxygen levels in the stream, the carrying capacity of the stream for the trout will decrease. Oxygen level in water is therefore a(n) _____________ with respect to the number of trout that a particular stream can support
Monday, December 16, 2013 at 5:28pm

science
Before beginning any land development project, people should carry out a(n) ___________________ analysis to consider all of the potential impacts of the project on the local ecosystems
Monday, December 16, 2013 at 4:43pm

Quick science question
In the newspaper one day, you read that the highest tides of the season are expected in the next month. What can you infer about the positions of the Sun, Earth, and the Moon? What phase of the Moon will probably be visible?
Monday, December 16, 2013 at 4:09pm

SCIENCE? HELP!
1. How does conservation plowing help limit the destruction of soil? • by rotating crops, removing moisture, and holding soil in place • by returning soil nutrients, retaining moisture, and holding soil in place • by rotating crops, retaining moisture, and ...
Monday, December 16, 2013 at 2:35pm

science
A nonnative species of animal is introduced into a healthy ecosystem. In its new environment, this species has no predators, although it preys on several native animals in the ecosystem. Make a prediction about the biodiversity and health of this ecosystem in the future? A....
Monday, December 16, 2013 at 1:13pm

science
A biologist studying a desert ecosystem observes that the population of a lizard species increases following a particularly hot, dry period that causes a snake population to decline. What could the biologist hypothesize about the roles of these two species? A.The lizard preys ...
Monday, December 16, 2013 at 1:12pm

science very urgent need help
An experiment is set up to test whether a particular insect prefer a dark or a bright environment. A chamber with a gradient in light intensity from one end (dark) to the other (bright) has been made. The experimental hypothesis is: “There will be a large difference ...
Monday, December 16, 2013 at 10:48am

Science Work
1. Which of the following traits is acquired A. the number of petals that grow in a plant's flowers B. the wing shape of a wild bird C. the ability of some gorillas to use sign language D. a cheetah's ability to run faster than any other animal 2. The height of a plant...
Monday, December 16, 2013 at 8:25am

Chemistry
ONe day, you were walking along the road with your friend and saw a piece of solid that you've never seen before. You were curious about the identity of the substance so you tried to give it to the Department of Science. You found out from them that it is a new found ...
Monday, December 16, 2013 at 7:29am

Science, very urgent please help
An experiment is set up to test whether a particular insect prefer a dark or a bright environment. A chamber with a gradient in light intensity from one end (dark) to the other (bright) has been made. The experimental hypothesis is: “There will be a large difference ...
Monday, December 16, 2013 at 5:25am

science
2. According to your text, the groundwater aquifers of India have been severely over pumped. (Points : 1)
Sunday, December 15, 2013 at 11:29pm

science work
1. Which of the following traits is acquired A. the number of petals that grow in a plant's flowers B. the wing shape of a wild bird C. the ability of some gorillas to use sign language D. a cheetah's ability to run faster than any other animal 2. The height of a plant...
Sunday, December 15, 2013 at 9:20pm

science
sodium is a metal and chlorine is a poisonous gas. Neither is safe to eat. However, when sodium and chlorine combine, it produces edible table salt. What can be concluded?
Sunday, December 15, 2013 at 9:20pm

Science
1. How did life begin? 2. Are we alone in the universe?
Sunday, December 15, 2013 at 6:29pm

science
what are some ways Earth is protected by its atmosphere?
Sunday, December 15, 2013 at 12:11pm

science
Is Saturn outer or inner planet???
Sunday, December 15, 2013 at 12:01pm

Help Science!!! :( need help
Is earth an inner planet or outer planet???
Sunday, December 15, 2013 at 8:36am

Science....
1.If a geologist found two fossils of different species buried next to each other in a rock layer, he or she might hypothesize that the two organisms may have been alive during the same time period. true*** false 2.How do layers B and D compare in age? If rock layers between B...
Saturday, December 14, 2013 at 10:41pm

Science
Explain how chemiosmosis functions in the cell. Discuss the energy transfers and explain the role of ATP in this process.
Saturday, December 14, 2013 at 10:18pm

Science help, Ms.Sue
1. After a rock layer is eroded, which additional event must occur to create an unconformity, or a gap in the geologic record? an earthquake or motion along a fault new deposits of sediment must build up on the eroded area folding of sedimentary rock layers a volcanic eruption...
Saturday, December 14, 2013 at 5:41pm

science
A nonnative species of animal is introduced into a healthy ecosystem. In its new environment, this species has no predators, although it preys on several native animals in the ecosystem. Make a prediction about the biodiversity and health of this ecosystem in the future? A....
Saturday, December 14, 2013 at 3:14pm

science
A biologist studying a desert ecosystem observes that the population of a lizard species increases following a particularly hot, dry period that causes a snake population to decline. What could the biologist hypothesize about the roles of these two species? A.The lizard preys ...
Saturday, December 14, 2013 at 3:13pm

Science help,plz:)
Okay, these are my last questions of the day.... 1. After a rock layer is eroded, which additional event must occur to create an unconformity, or a gap in the geologic record? an earthquake or motion along a fault new deposits of sediment must build up on the eroded area ...
Saturday, December 14, 2013 at 2:53pm

Science question?
1. Under which of the following conditions would a fossil most likely form? A living thing dies and sediment is very slowly deposited on top of its body. A living thing dies and sediment quickly covers its body. A living thing dies and its skeleton is left exposed to the ...
Saturday, December 14, 2013 at 1:17pm

science i reall need help i am stuggling
Sue is setting up an experiment to test whether fly maggots select a dark or a brightly lit environment. She sets up a chamber in which there is a gradient in light intensity from one end (dark) to the other (brightly lit). The experimental hypothesis was “There will be a...
Saturday, December 14, 2013 at 6:20am

science
during the Devonian period,animals that could live on land began to evolve, these animals till spent part of their lives in the water. what were these animals called? a) trilobites b) reptiles c) amphibians d) dinosoars
Friday, December 13, 2013 at 6:55pm

science
during the Devonian period,animals that could live on land began to evolve, these animals till spent part of their lives in the water. what were these animals called? a) trilobites b) reptiles c) amphibians d) dinosoars
Friday, December 13, 2013 at 6:55pm

science
In an island ecosystem, fox and skunks both hunt mice and toads. Which of the following correctly describes some of these relationships? A.Skunks and mice have a competitive relationship B.Skunks and toads have a predator-prey relationship C.Fox and skunks have a predator-prey...
Friday, December 13, 2013 at 6:13pm

science
during the Devonian period,animals that could live on land began to evolve, these animals till spent part of their lives in the water. what were these animals called? a) trilobites b) reptiles c) amphibians d) dinosoars
Friday, December 13, 2013 at 6:12pm

science
A nonnative species of animal is introduced into a healthy ecosystem. In its new environment, this species has no predators, although it preys on several native animals in the ecosystem. Make a prediction about the biodiversity and health of this ecosystem in the future? A....
Friday, December 13, 2013 at 6:10pm

science
A biologist studying a desert ecosystem observes that the population of a lizard species increases following a particularly hot, dry period that causes a snake population to decline. What could the biologist hypothesize about the roles of these two species? A.The lizard preys ...
Friday, December 13, 2013 at 5:42pm

Science
1. Which of the following traits is acquired A. the number of petals that grow in a plant's flowers B. the wing shape of a wild bird C. the ability of some gorillas to use sign language D. a cheetah's ability to run faster than any other animal 2. The height of a plant...
Friday, December 13, 2013 at 5:04pm

Science
What is the difference between a heterogenous and homogeneous mixture? And some examples for each heterogenous and homogeneous.
Friday, December 13, 2013 at 5:04pm

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