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July 22, 2014

Homework Help: Science

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Recent Science Questions

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science
why it is important to take care of the eyes and go for a regular checkup?
Friday, December 13, 2013 at 4:17pm

science
which of the following could be true of two different species that have a competitive relationship in the same ecosystem? A.one species preys on the other B.they relationship is mutually beneficial C.they share the same niche D.one species benefits, while the other is neither ...
Friday, December 13, 2013 at 3:48pm

science
A salamander is a keystone species in a forest ecosystem with high biodiversity. This species migrates from woodland areas to a local stream to reproduce. If a road is built that cuts off the woodland areas from the stream, what effect will this have on the forest ecosystem? A...
Friday, December 13, 2013 at 2:41pm

Science.
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 ...
Friday, December 13, 2013 at 2:32pm

science
What determines the carrying capacity of a particular population by an ecosystem? A.keystone species B.pioneer species C.limiting factors D.renewable resource
Friday, December 13, 2013 at 1:16pm

science
What is true? A.biodiversity provides additional that raise the carrying capacity of an ecosystem B.biodiversity increases an ecosystem's ability ti withstand changes C.biodiversity makes an ecosystem more difficult to destroy D.biodiversity provides additional sources of ...
Friday, December 13, 2013 at 1:15pm

Science
This is an image of the ocean floor. Identify the list of letters in the answer choices that correctly identifies the following sea floor features in the order they are listed here: abyssal plain, continental shelf, submarine canyon, continental slope here are the four choices...
Friday, December 13, 2013 at 12:41pm

science
radioactive decay occurs when atoms a) lose mass b) join with atoms of another element c) break down to form atoms of another element d) are exposes to chemical weather
Friday, December 13, 2013 at 12:08pm

science
if you were looking for an example of a trace fossil, for which of the following might you search? a) footprints and trails b) a whole body preserved in rock c) dinosaur teeth d) a hardened mineral smaple
Friday, December 13, 2013 at 12:03pm

science very urgent help?
Susan has heard that taking an over-the-counter ‘energy’ pill, which contains as much caffeine as a strong cup of coffee, makes people feel alert and ‘speedy’. She wonders if taking this pill will make a difference to the reaction times of people doing an ...
Friday, December 13, 2013 at 7:15am

science
hello, I am a grade six student. my question is: What are two types of ocean biome? i answered that in a drop quiz by neritic and oceanic. however , my teacher answered that by fresh water and salty water biomes. I am not convinced. The oceans are salty, how could they include...
Friday, December 13, 2013 at 6:28am

MAA Global Science
A lump of ice falls from a jet plane as it tries to land at an airport. If the ice hits the ground with a vertical speed of 85m/s, what was the height of the plane when the ice fell off.
Friday, December 13, 2013 at 12:00am

science
What determines the carrying capacity of a particular population by an ecosystem? A.keystone species B.pioneer species C.limiting factors D.renewable resources
Thursday, December 12, 2013 at 8:37pm

Physics-science
what is the heat required in kilo calories to covert 2kg of ice at 0 c completely into stream at 100c
Thursday, December 12, 2013 at 8:12pm

science
sound and light prentice hall science Explorer book 6th grade page 15 section 2 assessment 1.c. comparing and contrasting which wave properties are distances? which are measured relative to time
Thursday, December 12, 2013 at 7:59pm

science
why does buying food that is grown in your local area help prevent loss of biodiversity?
Thursday, December 12, 2013 at 7:38pm

science
What is a form of pollution triggered by a formation of a gas and can have dramatic effects? fog pesticides acid rain oil spill
Thursday, December 12, 2013 at 6:43pm

science
Use of which of the following does not contribute carbon dioxide to the environment? refrigerator charcoal grill computer bicycle
Thursday, December 12, 2013 at 6:36pm

science
Explain how your skin can be considered an organ.
Thursday, December 12, 2013 at 5:21pm

science
What activities would contribute the most global warming?
Thursday, December 12, 2013 at 4:59pm

science
the honeyguide bird leading the honey badger to the bees hive, both eat meat what is the symbiosis for this
Thursday, December 12, 2013 at 4:01pm

science i really really need help
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...
Thursday, December 12, 2013 at 3:51pm

Science
Which of the following ets of terms could be used in a deseription of the peripheral nervous system?
Thursday, December 12, 2013 at 2:39pm

Computer Science
Answer the following question without running the code. The procedure isMyNumber is used to hide a secret number (integer). It takes an integer x as a parameter and compares it to the secret number. It returns: -1 if the parameter x is less than the secret number 0 if the ...
Thursday, December 12, 2013 at 2:21pm

science i really really need help
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...
Thursday, December 12, 2013 at 1:01pm

Science Easy 2 Points!
Which of the following best explains why it is nessecary for the body to eliminate waste? a) to allow the body to maintain a certain size b) to keep the body's internal enviroment in balance c) to make room for nutrients coming in d) to reduce unpleasent odors What happens...
Thursday, December 12, 2013 at 12:19pm

science
Make a cross to show what will happen if a round seed (homozygus) is crossed with wrinkled green seed?
Thursday, December 12, 2013 at 12:14pm

Science
Explain how the process of fertilization take place in human female ?what would happen if there is no fertilization?
Thursday, December 12, 2013 at 12:12pm

science i really really need help
What is the independent variable? Select one option from the list below. 1 is the correct answer help me please .thanks 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 ...
Thursday, December 12, 2013 at 12:08pm

Science-bobpursley/Ms.Sue
1. A trilobite is considered an index fossil because this organism existed during a limited period in Earth's history. That means that any fossil located in a layer of rock beneath a layer containing trilobite fossils is ____________ than a trilobite. 2. According to this ...
Thursday, December 12, 2013 at 11:02am

science urgent help
What is the independent variable? Select one option from the list below. 1 is the correct answer help me please .thanks 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 ...
Thursday, December 12, 2013 at 2:26am

Science
6) - Which of the following compounds in the liquid phase can be considered an electrolyte?
Thursday, December 12, 2013 at 2:18am

science
Why are liners laid down at the bottom of a landfill before waste in the landfill?
Wednesday, December 11, 2013 at 9:45pm

science
which of the following would be most likely to lead to increase biodiversity? A.clear-cutting B.oil drilling C.national park planning D.farming
Wednesday, December 11, 2013 at 9:43pm

Science
What are two ways meiosis can cause genetic variability?
Wednesday, December 11, 2013 at 9:18pm

Science
No further energy can be removed from a substance when it is at ____ ____ Please help!
Wednesday, December 11, 2013 at 9:15pm

Science
You are creating a carbon cycle poster. In which direction would you draw arrows to show the movement of carbon through the process of respiration?
Wednesday, December 11, 2013 at 7:41pm

Science
Could you please explain meiosis in stages including interphase 1 (crossing over)? I need to understand this for a project at a 7th grade level.
Wednesday, December 11, 2013 at 7:11pm

science
I really need help with science and this is the questin reason for blank because earth is titled 23 1/2 from a line perpendicular to it's orbit,the legth of daylight varies and because of the angle at which the sun's energy strikes a given location through the year.
Wednesday, December 11, 2013 at 5:49pm

Science-3 questions.
Which of the following best describes the climates of Europe and North America during the 1.8 million years of the Quaternary period? hot and dry cool and rainy periods followed by droughts warm and mild a series of ice ages followed by periods when the glaciers melted Which ...
Wednesday, December 11, 2013 at 3:55pm

Check my Science questions?
1. Why is it rare for the soft parts of an organism to become a fossil? The soft parts take a long time to decay. The soft parts can be eaten by other animals. The soft parts cannot be buried in sediment. The soft parts form petrified fossils. 2. Which of the following terms ...
Wednesday, December 11, 2013 at 1:36pm

science
Complete the following sentence with the best phrase below. Removing just one species from an ecosystem B.would have little effect; unless it was a key stone D.would have a negative effect; especially if it was a keystone species
Wednesday, December 11, 2013 at 1:10pm

science
during radioactive decay atoms of a radioactive element break down and change into other atoms of another element-all at once a) true b) false
Wednesday, December 11, 2013 at 12:56pm

science
fossils allow scientists to predict which species will become extinct in the future a)true b)false folding as well as motion along faults can change the position o rock layers and how they line up with other layers a) true b) false
Wednesday, December 11, 2013 at 12:54pm

science
Which of the following pairs of terms could describe a bullfrog that is active at night and enters a state of complete inactivity during cold months? cooperation and hibernation aggression and circadian rhythm circadian rhythm and hibernation courtship and cooperation
Wednesday, December 11, 2013 at 12:14pm

science urgent need help
What is the independent variable? Select one option from the list below. 1 is the correct answer help me please .thanks 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 ...
Wednesday, December 11, 2013 at 12:14pm

science
during the Cambrian explosion that began the Paleozoic era, the many new forms of life that evolved ? a) lived on land b) were invertebrates lived in the sea c) were vertebrates covered with scales or fur d) were single celled
Wednesday, December 11, 2013 at 10:38am

science
which of the following occurred during the Mesozoic era ? a) the rise of reptiles b) the rise of planets c) the rise of invertebrates d) the rise of mammals a??
Wednesday, December 11, 2013 at 10:35am

science
How does x ray radiation affect seed germination? I dont really understand this.
Wednesday, December 11, 2013 at 9:26am

Science need help
What is the independent variable? 1 is that the correct answer help plz 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 ...
Wednesday, December 11, 2013 at 8:58am

science help plzzzzzzzzzzzzzzz?
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...
Wednesday, December 11, 2013 at 5:39am

Calculating acceleration science
A baseball picture who is standing 18.5 m from the batter throws a fastball moving at 40 m/s the batter swings contacts the ball for 0.03 and hits the ball straight back to the picture at 50 m/s. The velocities are constant Please show the work I want to learn. Thank you
Wednesday, December 11, 2013 at 1:38am

please help me!! with this science!!!!!
Multiple Choice: 1. If a kestrel eats a mouse that eats grass, the kestrel is a (1 point) producer. second-level consumer. first-level consumer. decomposer. 2. Which of the following best explains why a species of lizard is able to live in the desert but not in tundra regions...
Wednesday, December 11, 2013 at 1:17am

Math
In a science experiment, Ms. Dixon's students find that there is 0.00385 times as liquid in Beaker A as in Beaker B after two days. There are 3.5 millimeters of liquid in Beaker B. How much Liquid is in Beaker A?
Tuesday, December 10, 2013 at 8:37pm

Science
When scientists group up similar things together what are they doing? -~-My answer-~- classifying
Tuesday, December 10, 2013 at 8:06pm

Science
When is scientific knowledge changed?
Tuesday, December 10, 2013 at 7:49pm

Science
What is a example of a scientific law?
Tuesday, December 10, 2013 at 7:45pm

science
in a wet type of voltaic cell, what is electrolyte? a. a bridge made of salt b.a copper strip c. an acidic liquid d. a spontaneous flow of electrons
Tuesday, December 10, 2013 at 7:28pm

Science
What is the best tool to create a model of a complex this system?
Tuesday, December 10, 2013 at 7:22pm

Help me with this science.
Multiple Choice: 1. Which organisms are capable of converting gaseous nitrogen in the air into a form that other living organisms can use? (1 point) nitrogen-fixing bacteria denitrifying bacteria decomposers producers 2. Which step in the nitrogen cycle is accelerated at the ...
Tuesday, December 10, 2013 at 6:51pm

Science help,Anyone?
1. Why is it rare for the soft parts of an organism to become a fossil? The soft parts take a long time to decay. The soft parts can be eaten by other animals. The soft parts cannot be buried in sediment. The soft parts form petrified fossils. 2. Which of the following terms ...
Tuesday, December 10, 2013 at 4:52pm

Science HELP!!!!
Which waves have the longest wavelength and the lowest energy on the electromagnetic spectrum? 1. X-rays 2. infrared 3. radio waves 4. gamma rays
Tuesday, December 10, 2013 at 4:37pm

Urgent Science~!
Carla applied a force of 35 N to a wheelbarrow full of bricks and moved it 2.5 m. Which of the following can be determined from this information? The wheelbarrow supplied 87.5 J of work. The wheelbarrow has a mechanical advantage of 14.*** The wheelbarrow is 7 percent ...
Tuesday, December 10, 2013 at 12:48pm

Science need help
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...
Tuesday, December 10, 2013 at 7:18am

Science help,please...
1. Why is it rare for the soft parts of an organism to become a fossil? The soft parts take a long time to decay. The soft parts can be eaten by other animals. The soft parts cannot be buried in sediment. The soft parts form petrified fossils. 2. Which of the following terms ...
Monday, December 9, 2013 at 8:22pm

science
after six half-lives what percentage of a radioactive sample will remain? a) 0%-1% b) 1%-3% c) 3%-6% d) 6%-10%
Monday, December 9, 2013 at 8:16pm

science
how would 10 grams of helium be different that 10 grams of helium in a sealed container.
Monday, December 9, 2013 at 7:28pm

8th grade science :(
How are the Heliocentric Model and the Geocentric Model Similar? List as many ways as you can.
Monday, December 9, 2013 at 6:54pm

Science
A monkey that weighs 270 newtons is hanging from the branch of a tree. What is the size and direction of the monkey's force on the tree branch?
Monday, December 9, 2013 at 6:32pm

Help me with this science. 30 POINTS .
1. Which organisms are capable of converting gaseous nitrogen in the air into a form that other living organisms can use? (1 point) nitrogen-fixing bacteria denitrifying bacteria decomposers producers 2. Which step in the nitrogen cycle is accelerated at the beginning of the ...
Monday, December 9, 2013 at 6:25pm

science
I need the definition of an observation that use color, shape, texture, smell, taste
Monday, December 9, 2013 at 6:19pm

Science
How are the reactants and products of photosynthesis and cellular respiration related?
Monday, December 9, 2013 at 6:05pm

Science--HELP!!
1. In which of the following situations is a sound wave most likely to travel through air? A) An alarm clock rings in a vacuum. B) A giant star explodes. C) A grasshopper eats a leaf. D) An astronaut uses tools in space. 2. Which of the following factors determines the ...
Monday, December 9, 2013 at 6:00pm

science
which of the following will make it harder in the future to develop sustainable methods for humans using resources? A. there will be fewer renewable resources B.more humans will populate the earth C.biodiversity naturally reduces over time D.more humans will recycle materials
Monday, December 9, 2013 at 5:40pm

science
which of the following would help decrease the human ecological footprint? A.using bottled water instead of tap water B.using public transportation instead of riding in a car C.buying books instead of borrowing from the library D.using hot water instead of cold water to wash ...
Monday, December 9, 2013 at 5:14pm

science
A 50 N girl climbs the ladder with a 60 N painting in 5 seconds. She has done 120 J of work. How much power does she need?
Monday, December 9, 2013 at 4:01pm

science
How is biodiversity related to human activities that use natural resources? A.biodiversity decreases as humans use natural resources wisely B.biodiversity decreases as humans limit there use of natural resources C.biodiversity increases as humans deplete natural resources D....
Monday, December 9, 2013 at 2:50pm

science
which of the following will make it harder in the future to develop sustainable methods for humans using resources? A.biodiversity decreases as humans use natural resources wisely B.biodiversity decreases as humans limit there use of natural resources C.biodiversity increases ...
Monday, December 9, 2013 at 2:05pm

science
Complete the following sentence with the best phrase below. Removing just one species from an ecosystem: A.would have no effect, because it is just one species of many B.would have little effect, unless it was a keystone species C.would have a negative effect, unless it was an...
Monday, December 9, 2013 at 1:58pm

science
Which of the following could help reduce loss of biodiversity? A. increasing construction of tall buildings B. increasing farming operations C. increasing conservation measures. D. increasing the human ecological footprint
Monday, December 9, 2013 at 1:37pm

science
which of the following pairs of terms could be used to describe a bullfrog that is active at night and enters a state of complete inactivity during cold months? A. cooperation and hibernation B. aggression and circadian rhythm C.circadian rhythm and hibernation D. courtship ...
Monday, December 9, 2013 at 1:32pm

science
The acceleration of gravity is a constant equal to
Monday, December 9, 2013 at 9:45am

science
what are some similarities between Pahoehoe lava and Scoria aa lava?
Monday, December 9, 2013 at 1:07am

science gr.8
classify each as plane mirror, convex, or concave and briefly explain how the mirror is used to see images. 1) full length bedroom mirror 2) make-up mirror (compact makeup mirror) 3) car rear view mirror 4) dental mirror (used to look in mouth) 5) store security mirror 6) ...
Sunday, December 8, 2013 at 4:13pm

science
compare and contrast uplift and subsidence and give an example of how each can happen
Sunday, December 8, 2013 at 2:53pm

science
explain isostasy as it pertains to mountains
Sunday, December 8, 2013 at 2:33pm

BIOLOGY
Identify name at least one biological science problem and prepare a procedure on how to solve such problem then recommend solutions.
Saturday, December 7, 2013 at 10:18pm

BIOLOGY
Why are traits/scientific characteristics important in the field of science?
Saturday, December 7, 2013 at 10:11pm

BIOLOGY
Why is there a need for a scientist to know the limitations of science?
Saturday, December 7, 2013 at 10:09pm

science
I need an acrostic poem for the element Sodium?? puhleez?! THANX!!!
Saturday, December 7, 2013 at 9:54pm

Science
For a cell of the CsCl type (figure 9.18), how is the length of one side of the cell,s, related to the sum of the radii of the ions, r subscript cation + r subscript anion? Figure 9.18 : i . imgur . com / zHj2SGW.png Another question : Consider the NaCl unit shell in figure 9....
Saturday, December 7, 2013 at 4:47pm

Science need help???
A student wishes to test the accuracy of the measuring jug she is using in an experiment. The label on the jug claims that it measures volume to an accuracy of plus or minus 5 cm3. The density of water is about 0.999 g cm−3, which means that 100 cm3 of water should have ...
Saturday, December 7, 2013 at 12:05pm

Science
Ions are electrically charged particles that are formed when certain compounds are dissolved in water. These solutions will conduct electricity. The Swedish scientist Svante Arrhenius coined the term ion (which means wanderer) to explain why solutions of electrolytes will ...
Saturday, December 7, 2013 at 11:14am

life science,history,6eography,and maths lit
im in grade 12 and i dn't no wht job must i take so can you plz tell me wht kind of jobs is available
Saturday, December 7, 2013 at 5:19am

5th grade science
Which of the following best describes an electric charge? -Positive or negative terminal of a battery -property of electrons, protons, and neutrons -materials that conducts current -has a north pole and a south pole
Friday, December 6, 2013 at 5:43pm

5th grade science
Which of the following is an example of a nonmnetal conductor? copper wire, salt water, plastic covering of a wire, or cotton clothing?
Friday, December 6, 2013 at 5:42pm

science
which of the following sets of term is associated with air pollution caused by burning fossil fuel jiskha homework
Friday, December 6, 2013 at 4:06pm

science
An object accelerates (changes its speed) only if the forces acting on it in one direction are greater than the forces in the opposite direction, All of the following objects will accelerate EXCEPT?
Friday, December 6, 2013 at 2:58pm

science
Which of the following best describes an electric charge? -Positive or negative terminal of a battery -property of electrons, protons, and neutrons -materials that conducts current -has a north pole and a south pole
Friday, December 6, 2013 at 2:50pm

science
Which of the following is an example of a nonmnetal conductor? copper wire, salt water, plastic covering of a wire, or cotton clothing?
Friday, December 6, 2013 at 2:46pm

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