Science

Recent Questions

science
explain the locations ozone can be found, how ozone is helpful, how is it harmful,what causes the deposition of the ozone layer

SCIENCE!!
1.How do scientists classify small objects in the solar system? A)By size B)By shape C)by size, shape, and temperature D)by size, shape, and composition** (**=ANSWER!!)

science
concept map of flower pollen stamens ovaries pistils stigmas filament anther ovules petals and sepals

General science
Which of the following is not a natural result or response to overpopulation? A. Starvation B. Predation C. Extinction D. Migration C

English
At school, he learns 10 subjects such as math, science, social studies, computers, ethics, etc. He is in math class now. He has a cell phone. He is sitting at the back. One of his friends calls him and asked "Which class are you in?" What is the answer to the question. 1. I'm ...

Science
What if a student gets a 65 on 1 test and 100% on 4 tests? What will there grade be?

Science
True or False? Energy is measured in Newtons?

Science
Which of the following can be accurately said about climax communities? A. Climax communities are always stable. (B. Restoration of the original climax community is always achieved at the same rate.) C. Climax communities are always uniform. D. Restoration of the original ...

Nature Science
Which of the following can be accurately said about climax communities? A. Climax communities are always stable. (B. Restoration of the original climax community is always achieved at the same rate.) C. Climax communities are always uniform. D. Restoration of the original ...

Science
This is not questions its the answers hope it helps took a long time to type. A basketball momentarily changes shape as it bounces off the floor. This is due too balanced forces acting on the ball TRUE* FALSE* A ball slowing down as it rolls across a carpet is a example of ...

Science
Hi!One Question! Which of the following explains why your body may contain a carbon atom that was present in George Washington's body from 1776?

science
a person roller skates down a street heading east which of the following would be true abot friction in this scenario? ----------------------------------- 1.A. friction does not affect the skates in this scenario 2.B. friction pulls the skates wheels eastward 3.C. friction ...

Mathametical Literacy,Agricultural Science,History,Geography,English,Life Orientation and Tshivenda
Which job can I get by these subjects?

Science
'Cl(OCl)Cl' What is the name of it?

science help pls pls
The diagram below shows the movement of energy in the water cycle. Diagram showing the movement of energy in the water cycle. There are three boxes and six arrows that appear in the following order: box labeled 'Atmosphere,' one arrow pointing to a box labeled '?,' arrow ...

science help PLS
Plants take up carbon dioxide from the air and nutrients from the soil. This is an example of interactions between the geosphere, cryosphere, and atmosphere biosphere, atmosphere, and geosphere atmosphere, hydrosphere, and geosphere cryosphere, atmosphere, and hydrosphere

science help
Two factors which cause global climate change are listed below. Factor 1: Volcanic eruptions. Factor 2: Changes in the amount of Sun’s heat received by the Earth’s atmosphere and surface. Which of these statements is correct about the two factors which cause global climate...

science help pls pls
Look at the position of Location 1, Location 2, and Location 3 in this picture. Simple diagram of a lake represented by a wavy circle. The circle is labeled 'Lake,' and there are three points outside of the lake: 'Location 1' is to the northeast of the lake, 'Location 2' is to...

science
what is the name of the gas which forms dry ice ...........u can also send the lab. preparation of it

science
3 identical point charges each one micro coulomb placed at vertices of an equilateral triangle 10cm apart calculate the force on each charge

science
If mass M explore into three pieces two of equal to M/4 move perpendicular to each other with 3m/s 4m/s determined velocity of third

Political science
How did the Stamp Act, Boston Massacre and Boston Tea Party connect with the idea of representation? Use Zinn "Voices of a people's history of the united states" and the Federalist Papers to support your answer. Also, be sure to discuss the ideas of pure democracy, ...

science
You observed light passing through lenses and through a set of prisms. Why does refraction occur?

SCIENCE
History of how this ginger has been used as medicine

Science
What's the difference between the types of light detected by radio, refracting, and reflecting telescopes?

SCIENCE
History of how this ginger has been used as medicine

science help ASAP
can someone Explain the process of succession plz

Maths lit,life science,agriculture,geograph
Plzzz help me which carree can i choose?

Science
Belonging to one communtity

Science AP Chemistry
It is necessary to add iodide ions to precipitate the lead(II) ions from 250 mL of 0.076 M Pb(NO3)2(aq). What minimum iodide ion concentration is required for the onset of PbI2 precipitation? The solubility product of PbI2 is 1.4 × 10−8 . Answer in units of mol/L. What ...

science
How much sodium bromide do I need to make 100 ml of 0.2m solution?

math lit,life science,agriculture,geogrphy,L.O,
Which good career path is good for the following subject

Science
a bullet with mass 0.281 kg is fired from a rifle. It stick into a block of wood with a mass of 17.8 that was at rest. The block/bullet combo moves at 3 m/s. What was the initial velocity of the bullet?

politcal science
As of January 2015, how many members of the House of Representatives and the Senate are NOT members of the Democratic or Republican party? 0 123 100 2

politcal science
Which of the following is NOT one of the Republican party factions? Fiscal Conservatives Libertarians Organized labor Neoconservatives

politcal science
Who is the only third-party candidate to win more than 25% of the popular vote? Question 7 options: Millard Fillmore Theodore Roosevelt George Wallace Ralph Nader

politcal science
In Washington's Farewell Address, what type of policy did he advocate when dealing with foreign countries? Question 6 options: Complete isolation for all foreign countries Extensive treaties with other countries Expansion of US power over foreign countries Neutrality in ...

science help PLS
Which of the following types of stars started out on the main sequence with the largest initial mass? In Graph A, the curve peaks at 800 nm, in the red section of the visible light spectrum. In Graph B, the curve peaks at 550 nm, in the green section of the visible light ...

History ,life science,Geography,Lo,Maths lite,English and Setswana
Careers in history

science
interpret the number of moles of oxygen atoms in po3- 4

7th Grade Science
Hi, I really need help with this. I'm supposed to find information about biodiversity and fishing or housing and answer these two questions: "What challenges does [your topic] pose to biodiversity? What do you think should be done and why?" The websites my school gave me are ...

Science
Two teams are pulling on a rope. Team 1 pulls with a force of 124 newtons, while team 2 pulls with a force of 110 Newton in the opposite direction which of the following correctly describes the motion that will result A. Team 1 will move, team 2 will not B. Team 2 will move, ...

Science
Please Check! 1. How does nanotechnology help engineers make products for the future? a. By changing a materials atomic structure, it can be made from elements that are easier to obtain.*** b. By changing a material's atomic structure, its physical properties can also be ...

Science Please Check
Please Check 1. How does nanotechnology help engineers make products for the future? a. By changing a materials atomic structure, it can be made from elements that are easier to obtain.*** b. By changing a material's atomic structure, its physical properties can also be ...

Science
is there a chart available that show the vapor pressure of Isopropyl alcohol and water solutions at 68 degrees F ?

science
Briefly describe how you would prepare 500cm of 1mole of NaCl solution in the laboratory.(Na-23,Cl-35.5)

Science
What is a real-world example for biochemical conversion?

science
four ways humans use natural resources

SCIENCE NOW
name two hormones produced by the ovaries and explain what they do?

science
during which phase can fertilization occur A. phase 1 B. phase 2 C. phase 3 D. any of the phases *******? more info phase 1 is between 1-7 phase 2 is between 7-14 phase 3 is between 14-28

Science
How does sea-floor spreading occur? A, New materials are being added to the asthenosphere. B, Earthquakes break apart the ocean floor. C, Sediments accumulate at the area of spreading. D, Molten material beneath Earth's crust rises to the surface. •• 2, Which features form...

Science
Which of the following shows fossils as evidence of continental drift? A. Limestone layers in the Appalachian Mountains of North America were exactly the same as the limestone in Scotland's highlands B. Mesosaursus, an ancient reptile, had been discovered in South America and...

Science
ing to Wegener's hypothesis of continental drift,? A.Earth's surface is made up of seven major landmasses. B.the continents do not move. C.Earth is slowly cooling and shrinking. D.the continents were once joined together in a single landmass.•• Correct me plz

science
You wish to obtain a magnification of -2 from a convex lens of focal length f. The only possible solution is to?

science
the density of an object with a volume of 60.0 mL and a mass of 400.0g is___? a. 0.150g/mL b. 2.89g/mL c. 5.50 g/mL or d. 6.67 g/mL

Science
1. Which climate is warm, wet, and located on the edges of the tropics? A. temperate marine B. highlands C. temperate continental D. polar 2. Which statement best explains why tropical climates are so hot? A. They receive little rain B. They receive more direct sunlight than ...

science
1. Two point charges 4 μC and 2 μC are separated by a distance 1 m in air. At what point on the line joining the two charges is the electric field intensity zero?

science
If the number of loops on an electromagnet increases, the strength of the magnet will?

Earth Science (check answers)
Describe the importance of maintaining the ocean ecosystem. It is important to maintain because the ocean ecosystems because it provides reefs that support a complex ecosystem of ocean organisms that live and help each other to survive. Virtually every phyla on Earth is ...

science(physics)
A 2kg stone is droped from the top of a 20m building a)what potential energy does it posses b)At what height does its potential energy become equal to its kinetic energy? c)what is its kinetic energy just before it hits the ground? d)With what velocity does it reach the ground...

math
In an examination 70 student failled in math¡A90failed in science and 20 failed in both. if 80 student passed in math using venn-daigram¡A find how mamy student were passed in both subject¡H

science
hello! just needing help with this question. Why does milk have to be an emulsion to be considered a complete food?

science
state the type of transformation of energyin a dry cell discharges and in a hydro electric power plant.

science
A 12V battery has 6cells in series. The E.m.f of the battery is 13.8V and the load drawing 10amp is connected to the battery. THe PD is now 12.0V. Calculate the internal resistance per cell of the battery

science physics
A penny is dropped from a window and takes 1.82s to reach the ground. From what height was it dropped.

Science
Sammy and Andy wanted to measure their classroom. Would this work? Why or why not

Science
15)Which of the following shows the correct sequence of what happens to the water molecules in an ice cube when it is removed from the freezer? 1. the molecules gain enough energy to break free from each other. 2. the ice begins to melt 3. the molecules vibrate in a fixed ...

Science
13.)How can substance A and B be compared? Choose all that apply. A.)The particles of substance A have more energy than the particles of substance B.*** B.)The particles of substance A are more tightly held together than the particles of substance B. C.)The particles of ...

Science
Describe the importance of maintaining the ocean ecosystem.

Science
What should I take next year? I am in the 5th grade. I want to know what classes i should take for 6th grade.

Science-The Solar System
What are two major differences in the composition of the inner and outer planets? I know that the inner planets are small, hard, and rocky, and the outer planets are large and gaseous. What is another difference?

Science
Q: Mant people who care about natural resources would choose to use wind power at their homes. however, wind power is not an option for people in many parts in the country. Explain what benefits of wind power are and why is it not available to everyone in the U.S. In your ...

Science
How does the principals of convection, conduction, and radiation explain how the water in the saucepan gets hot?

science
1. What would happen to an object if the force of gravity on Earth was decreased by half? (1 point) Its mass would decrease. Its weight would decrease.* Its density would decrease. Its volume would decrease. 2. Which of the following represents a heterogeneous mixture? (1 ...

maths,agricultur;life science,business
identify three courses or study fields you are interestedin following after grd12.write them down in order of preference.provide 2 reasons why you find this a suitable course for each choice

Science
A slab of granite has a mass of 1400.0 grams. The specific heat of granite is 0.040 J/gC. How much heat must be absorbed to raise the granite slab's temperature by 75 degrees C? 11.8 kJ 80.5 kJ 88.2 kJ 19.5 kJ I've tried solving this several times and I never get one of these ...

physical science
Balance of the following equation Ca+O2=CaO

Math literature, Life Science, Geography and Tourism
What job can I do will doing those subjects

U.S. History
I have to do a slide presentation, and just needed some ideas to write about. Students will create a 3-slide presentation on any development in culture, science, and technology from 1914-1945, in America. So can you give me some ideas to write about?

science
acetic acid has a pka of 4.8 how many ml of 0.1M acetic acid and 0.1M sodium acetate are required to prepare 1L of 0.1M buffer with a PH of 5.8? solve

Science
1. Which of the following about the suns structure is true? A.The sun has a solid surface. B. The sun has an interior and an atmosphere. * C.The sun's is similar to Earth's; it has a core, mantle, and crust. D. The sun's outermost layer is called the radiation zone.

Science
Where on the ocean floor will you find the greatest amount of living organisms? Answer: the coral reefs The greatest amount of living organisms can be found in the photic zone where sunlight can penetrate water, and where organisms that photosynthesize depend on sunlight. ...

Science
Where on the ocean floor will you find the greatest amount of living organisms? Answer: the coral reefs The greatest amount of living organisms can be found in the photic zone where sunlight can penetrate water, and where organisms that photosynthesize depend on sunlight. ...

Science
Where on the ocean floor will you find the greatest amount of living organisms? Answer: the coral reefs The greatest amount of living organisms can be found in the photic zone where sunlight can penetrate water, and where organisms that photosynthesize depend on sunlight. ...

Earth science
Where on the ocean floor will you find the greatest amount of living organisms? Answer: the coral reefs

7th Grade Science About Mitosis & Meiosis
Hello, I really need help about mitosis and meiosis. So in my project, it asks me to explain three differences between mitosis and meiosis. I only have one difference and this is what I wrote: Mitosis-A type of cell division in which daughter cells are identical to parent ...

Science: Physics
mr. slott at his fighting weight of 1000N jumps down from a platform meters above a trampoline with a spring constant (k) of 500N/M. How much does Mr.Slott strech the trampoline (x) before it brings him to a stop

science
How are Earth and Venus similar ? How are they different? give 2 similarities and 2 difference thanks

Science, don't leave me hanging plz.
1. Which of the following describes how matter moves between producers, consumers, and decomposers in an ecosystem? A. one-way flow from producers to consumers to decomposers. B. one-way flow from decomposers to consumers to producers. C. cyclic flow from producers to ...

Science
Hi, can someone explain how cell membranes and their components participate in intercellular signaling. Maybe give an example of cell membrane involvement in one particular type of cellular signaling.

Science
Can someone describe the G protein receptor system and the tyrosine-kinase receptor system. I wanna know how these two systems are similar and how these two systems are different in their of structures and functions.

Science
If it requires 23.4 milliliters of 0.65 molar barium hydroxide to neutralize 42.5 milliliters of nitric acid, solve for the molarity of the nitric acid solution. Show all of the work used to solve this problem. Unbalanced equation: Ba(OH)2 + HNO3 -> Ba(NO3)2 + H2O

science
If the density of Hg is 13.53 and 62.5 respectively. How many grams,moles,atoms of Hg do you have?

Science
using the equation c3h5+5o2=3co2+4h2o, calculate the mass of c3h8 that can produce 100g of h2o

Life Science
The process by which cellular material is divided between two new cell. (2 words)

Science
Two equal vectors are working at a point.The resultant is equal to one of those vectors.Prove that the resultant bisects the angle between the vectors.

Health
Which profession should a person who suffers from chronic asthma probably stay away from? A. Criminal attorney <<<<< B. Earth science teacher C. Grocery store manager D. veterinarian.

science
how does the weight placement in a rocket effect the distance

Science Experiment Help (pt 2)
did the experiment (correctly this time), still need help with the answer to this question: What other mixture can be separated by crystallization? thnx for the help!

science
What is density of acetone at 23°C

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