Questions and Answers for Science

Science

What are ten examples of solutions that you might find in your home?

Any substance dissolved in another substance is considered a solution. The solvent (the stuff that does the dissolving) in most household substances is water. So, anything dissolved in water would...

Latest answer posted June 21, 2018 5:01 pm UTC

2 educator answers

Science

What are 5 pure elements that can be found in your home?

Most products and materials that would be found in your home are compounds, mixtures or alloys. Only the most stable elements will resist reacting over time. Metals found in the home are often...

Latest answer posted January 21, 2016 10:24 pm UTC

1 educator answer

Science

What is the difference between saturated, unsaturated, and supersaturated? 

Saturated, unsaturated and supersaturated refer to three different conditions of a solution. A saturated solution contains the maximum amount of solute that will dissolve at that temperature. Any...

Latest answer posted November 19, 2015 4:27 am UTC

1 educator answer

Science

Which elements tend to lose electrons? What charge will they become?

Elements that are metals tend to lose electrons and become positively charged ions called cations. Elements that are nonmetals tend to gain electrons and become negatively charged ions called...

Latest answer posted March 12, 2016 7:52 pm UTC

1 educator answer

Science

How do you calculate the number of neutrons?

Take note that the nucleus of an atom is composed of protons and neutrons. And the number of particles present in the nucleus is referred as mass number (Also, called as atomic mass). mass number =...

Latest answer posted October 22, 2014 12:00 am UTC

1 educator answer

Science

Similarities Between Photosynthesis And Cellular Respiration

Similarities ... → Both involve in production of energy → Both involve the exchange of gases → Both the process takes place in cell organelle which was considered as endosymbiotic organism. They...

Latest answer posted June 23, 2012 5:12 pm UTC

3 educator answers

Science

What are the some example of a solution, solvent, and solute?

A solution is the final product once a solute is dissolved within a solvent. A very important example of a solution used in hospitals is saline used in IVs. Saline is made up of salt and water....

Latest answer posted July 30, 2015 1:34 am UTC

2 educator answers

Science

What are the three parts of the cell theory?

The cell theory is an explanation of what cells are and why they exist. The three main parts are: 1) All living things are made of cells and their products, 2) New cells are created by old cells...

Latest answer posted July 17, 2012 2:55 pm UTC

2 educator answers

Science

What are the four basic functions of a computer system?

Although on the surface it seems that computers are very sophisticated devices, capable of accomplishing complex tasks, in fact, computers can only do a limited number of very simple tasks on a...

Latest answer posted September 19, 2015 9:37 pm UTC

2 educator answers

Science

Why is it important for scientists to know the properties of matter?

It's important for scientists to know the properties of matter because all things are made up of matter. Each type of matter has different physical characteristics and scientists need to know and...

Latest answer posted November 18, 2015 8:36 pm UTC

1 educator answer

Science

What is the difference between uniform and non uniform mixtures?

The difference between uniform and non-uniform mixtures is the degree at which the materials are mixed and the sameness of their composition throughout the mixture. Another word for a uniform...

Latest answer posted September 19, 2015 11:33 pm UTC

1 educator answer

Science

What is the difference between a rift valley and a mid-oceanic ridge?

As tectonic plates move they sometimes move away from each other at divergent plate boundaries. The space left behind opens a large hole between the plates that is either filled with sediment,...

Latest answer posted May 7, 2016 8:13 pm UTC

1 educator answer

Science

List these items in order from largest to smallest: organelle, cell, tissue, organism, population, molecule.

Let's reason our way through this.Organelles are the substructures (such as mitochondria and chloroplasts) inside cells that perform particular functions. They are therefore smaller than...

Latest answer posted July 22, 2016 9:09 pm UTC

1 educator answer

Science

Which characteristics enabled Earth to support and sustain life?  

There are a number of factors that enable life to exist on Earth. Here is a brief list of some of those factors: Distance from Sun: Earth is at the right distance from the Sun, the star it orbits....

Latest answer posted May 12, 2016 1:06 pm UTC

1 educator answer

Science

What is the importance of the high specific heat of water for life on Earth?

Specific heat capacity is the amount of heat required to raise the temperature of a substance by 1 K. It is expressed in the units J/ (kg*K). A high specific heat of a substance means that a large...

Latest answer posted February 19, 2011 3:28 pm UTC

1 educator answer

Science

What are some examples of a closed system?

A closed system does not exchange mass with its surroundings and is only capable of exchanging energy with the surroundings. In comparison, an open system is capable of exchanging both mass and...

Latest answer posted January 16, 2016 2:19 pm UTC

1 educator answer

Science

How can I determine the reactivity of an element?

The reactivities of elements can be predicted by periodic trends (patterns within the Periodic Table.) Let's start with periodic trends. An element's reactivity is its tendency to lose or gain...

Latest answer posted November 27, 2015 7:40 pm UTC

1 educator answer

Science

What are the 10 steps of the scientific method? Please help! i need for Honors acedemic core!

Hagar, I've always taught this as four steps, but I found this at answers.com and am copy pasting it here to help you out: 1. Understand the Problem2. Collect Information3. Form a Hypothesis4....

Latest answer posted July 16, 2011 3:49 am UTC

1 educator answer

Science

What are the purposes of research?

Research is simply a detailed and focused study, using scientific methods, to understand why something happens and/or what are its applications. Research is basically done for two purposes: to...

Latest answer posted October 6, 2015 12:35 pm UTC

1 educator answer

Science

An ion of iron has an 26 protons, 30 neutrons, and 23 electrons. What are its atomic number, atomic mass, and net...

The atomic number of an atom is the number of protons. The atomic mass is the sum of the protons and neutrons. The net charge is the difference between the number of protons, which have positive...

Latest answer posted December 7, 2015 10:02 pm UTC

1 educator answer

Science

Rank the following items in order from largest to smallest: cell, chromosome, gene, DNA, organism, nucleus.

The ranking of the given items from largest to smallest is as follows: Organism > Cell > Nucleus > Chromosome > Gene > DNA DNA is a molecule that can be thought of as the blueprint...

Latest answer posted December 7, 2018 12:04 pm UTC

1 educator answer

Science

What are the 3 main ways to identify an element?

Elements are types of atoms that have a unique number of protons. In fact, from left to right, the periodic table is arranged by the number of protons that each element contains. The periodic table...

Latest answer posted February 26, 2016 1:24 pm UTC

1 educator answer

Science

Classify the most common materials used in your home into pure(element compound)or mixture(heterogenous and homo----)...

Food items are compounds--carbohydrates, lipids, proteins are in fact organic compounds, as they all contain carbon and hydrogen. Besides that, there is oxygen in all three and in protein, the...

Latest answer posted June 28, 2012 11:58 am UTC

1 educator answer

Science

When you get a shot and end up with a big bruise and they say it's because you bruise easy, is this the case?

Some individuals do in fact bruise easily, they may have an ascorbic acid(Vitamin C) deficiency or some coagulopathy. Perhaps they are taking a blood thinner medication like Coumadin, ASA, or...

Latest answer posted June 5, 2010 10:10 am UTC

2 educator answers

Science

give at least 3 examples of community

In ecology, there are different levels of organization regarding the biotic, or living factors, in the ecosystem. An individual is a single organism, a population is a group of organisms of the...

Latest answer posted October 31, 2015 12:24 am UTC

1 educator answer

Science

Arrange these biological terms in order of size (from the smallest to the largest): organ, cell, organism,...

The smallest item in the list would be organelles. Organelles are tiny structures within a cell, that help it to function. Example of organelles are-- nucleus, mitochondria, cell membrane to name a...

Latest answer posted September 9, 2010 3:07 am UTC

1 educator answer

Science

How can you determine whether an equation is endothermic or exothermic?

There are a couple of ways to determine if a reaction is exothermic or endothermic. Endothermic meaning that heat is added to the reaction to make the reactants interact and exothermic meaning heat...

Latest answer posted September 29, 2010 8:45 am UTC

2 educator answers

Science

Two strips of potatos.. one placed in distilled water and the other in air.. what will happen to them both and why?

The process that happens to both potato slices is called osmosis, which is a diffusion of water across the semipermeable membrane the potato slice cells possess. The water will either go into the...

Latest answer posted January 22, 2012 5:13 am UTC

1 educator answer

Science

What is a scientific question?

A scientific question is a question that may lead to a hypothesis and help us in answering (or figuring out) the reason for some observation. Asking a scientific question is a part of the...

Latest answer posted October 6, 2015 5:49 am UTC

1 educator answer

Science

What is meant by "experimental set-up" and "control set-up" in biology?

When you set up an experiment, you have to have one set up where you introduce the independent variable (the experimental set up) and one where you do not (the control). That way, you can compare...

Latest answer posted September 17, 2010 11:32 pm UTC

2 educator answers

Science

What are the functions of a computer?

While the functions and applications of a computer are almost endless, we can sense four primary purposes that are all linked to data (information): Entering data, manipulating data, viewing...

Latest answer posted July 6, 2009 9:23 pm UTC

1 educator answer

Science

CH4(g) + 2O2(g) ->  CO2(g) + 2H2O(g) Why is this reaction classified as exothermic?    

Based on the energy requirements or generation, reactions can be classified as either endothermic or exothermic. The reactions which need energy to proceed are known as endothermic reactions. The...

Latest answer posted May 11, 2016 12:18 am UTC

1 educator answer

Science

What is the relation between the focal length and the radius of curvature ? prove?

The focal length (f) of a lens is the distance between the center of the lens and the point at which the reflected light, of a beam of light travelling parallel to the center line, meets the center...

Latest answer posted June 1, 2013 9:48 pm UTC

1 educator answer

Science

An atom that has gained or lost electrons is called an ___.

Atoms consist of electrons, protons and neutrons. While the protons and neutrons are present inside the nucleus, the electrons orbit around it. Among these particles, protons are positively...

Latest answer posted May 15, 2016 6:20 pm UTC

1 educator answer

Science

What are the differences and similarities between elements, compounds and mixtures?

Atoms, elements, compounds, and mixtures are all forms of matter. Matter is defined as anything that has mass and volume. Atoms, elements, and compounds are all pure substances. A pure substance is...

Latest answer posted February 28, 2016 12:54 pm UTC

2 educator answers

Science

What would happen to the life of a cell if there was no Golgi apparatus?  

The golgi apparatus contains vesicles and folded membranes and is involved in cellular transport. It is a packaging organelle. The golgi apparatus packages proteins into vesicles inside of the cell...

Latest answer posted July 11, 2016 8:43 pm UTC

1 educator answer

Science

What are some similarities between igneous and metamorphic rocks?

Igneous, sedimentary, and metamorphic are the three types of rocks. Among these, igneous and metamorphic rocks share the following similarities: Both of them are types of rocks. Temperature is a...

Latest answer posted April 9, 2018 11:17 am UTC

1 educator answer

Science

Is frying an egg a physical or chemical change?

Matter is composed of particles. Particles are composed of one or more type of atom. Changes in Matter Physical Change: Physical change occurs when the particles of a substance become rearranged,...

Latest answer posted May 15, 2016 4:23 pm UTC

1 educator answer

Science

when will the average velocity be equal to instantaneous velocity?

Average velocity is equal to the instantaneous velocity when acceleration is zero. In order for acceleration of an object to equal zero, there can be no change in speed or direction. For example,...

Latest answer posted July 27, 2011 10:46 pm UTC

1 educator answer

Science

How do the functions of ribosomes, the Golgi body, and the endoplasmic reticulum relate to one another?

Ribosomes, along with RNA (m, t, and r), work to produce proteins. If ribosomes are located on the endoplasmic reticulum, then it is called a rough endoplasmic reticulum (due to the "bumpy"...

Latest answer posted September 29, 2015 12:37 am UTC

2 educator answers

Science

What are the 4 types of consumers?

The four types of consumers in ecology are herbivores, carnivores, omnivores, and decomposers. Herbivores are consumers who only eat vegetables, plants, grass, or some type of vegetation. An...

Latest answer posted December 5, 2015 8:34 pm UTC

1 educator answer

Science

How are sound and light alike and different?

Sound and light are similar in that both are forms of energy that travel in waves. They both have properties of wavelength, freqency and amplitude. Here are some differences: Sound can only travel...

Latest answer posted February 25, 2016 2:51 am UTC

1 educator answer

Science

Why is a car not a living thing?

A car is not a living thing because it does not fulfill some key characteristics that define living things. All living things are composed of cells. Unicellular organisms are composed of a single...

Latest answer posted April 18, 2016 12:33 pm UTC

1 educator answer

Science

What is an example of a poor conductor?

A material can be a poor conductor of heat, electricity, or both. A poor conductor means that the substance will not easily conduct heat or electricity (or both) as easily as a conductor. For...

Latest answer posted July 8, 2018 12:07 pm UTC

1 educator answer

Science

There are 3 different possible structures (known as isomers) for a dibromoethene molecule, C2H2Br2. One of them has...

The three isomers are shown in the attached diagram. The structure on the left has no net dipole moment and the structures in the center and on the right do. Here's why: The structure on the left...

Latest answer posted October 27, 2015 2:09 am UTC

1 educator answer

Science

A ball is dropped from the top of a tall building of height = 50 m. About how long does it take for the ball to hit...

Any object will accellerate due to gravity -9.81 m/s^2. By integrating this acceleration over time, one obtains the velocity at any time t. v = gt + v0. In this case, the ball started at rest, so...

Latest answer posted September 6, 2010 2:24 pm UTC

1 educator answer

Science

What reaction happens when you mix sand and water?

When we mix sand and water, no reaction takes place. The sand simply settles down at the bottom of the water container. This is because sand is heavier than water and hence cannot float in water....

Latest answer posted March 18, 2016 9:19 am UTC

1 educator answer

Science

When wood burns, what kind of energy is created?

To understand what energy is created by burning wood, one must first look at the two basic types of energy: potential energy and kinetic energy. Potential energy is defined as any type of stored...

Latest answer posted November 18, 2015 11:13 pm UTC

1 educator answer

Science

Write a balanced equation for NaCl (aq) + AgNO^3 (aq).

Sodium chloride (NaCl) and silver nitrate (AgNO3) are both solids that are highly soluble in water. They give a double displacement reaction where the ions switch places and give sodium nitrate...

Latest answer posted October 20, 2012 2:44 pm UTC

1 educator answer

Science

What is the difference between art and science?

There are two paramount differences between art and science. The first is that art is subjective while science is objective. The second is that art expresses knowledge, most often in the form of...

Latest answer posted June 17, 2010 4:17 am UTC

3 educator answers

Showing 1-50 of 20122