Science Questions and Answers
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...
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...
Science
What is the symbiotic relationship between orchids and trees?
A symbiotic relationship is a relationship between two organisms that can be helpful, harmful, or have no effect. A mutualistic relationship benefits both species involved in the relationship....
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...
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...
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...
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...
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...
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...
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...
Science
Write and balance the equation for the reaction of hydrochloric acid (H2SO4) and sodium hydroxide to produce sodium...
First, we should recognize that the formula (H2SO4) is not hydrochloric acid. The root "chlor" in "hydochloric acid" denotes the presence of chlorine, which is not present in H2SO4. Hydrochloric...
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...
Science
In a galvanic cell, if you change the concentration of one of the electrolyte solutions, what effect does it have on...
In a galvanic cell, the reason the voltage is generated is because of the combined electric potentials of the two metals in the metal sulfate solution of the electrolyte. If you increase the...
Science
How would you arrange chromosome, gene, genome, and nucleotide in order from smallest to largest?
From smallest to largest: nucleotide, gene, chromosome, genome. Nucleotides are the smallest building blocks of DNA. There are four nucleotides (A, G, T, C) which arrange in pairs to form the long...
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...
Science
What are advantages and disadvantages of a bar chart?
Advantages: Bar charts are pretty easy to interpret, and there's a very clear relationship between size and value that allows easy comparison. They're simple to make and most people have experience...
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...
Science
How do you find the genotype of an individual on a pedigree?
Using a pedigree to determine the genotype of an individual for a particular trait, based on the individual’s family history can be done via the following steps. Please note that these steps are...
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...
Science
How would you balance the equation P + O2 -> P2O5 ?
The given chemical equation is for reaction between phosphorus (P) and oxygen (O2). The product is phosphorus pentoxide (P2O5). The reaction is : P + O2 -> P2O5 A well-balanced chemical...
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...
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...
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...
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...
Science
What would make your hair and nails all of a sudden start to grow rapidly? There has been no change in diet.
One reason for sudden hair and nail growth could be due to an improvement in your overall health. There are many vitamin deficiencies that can cause your hair and nails to grow slowly. Sometimes...
Science
What is the speed of the pendulum at the lowest point in the following case: A pendulum is swinging so that its bob...
Alternatively we can use the conversion of gravitational potential energy (maximum at top of swing with minimum kinetic energy because it is momentarily motionless) to kinetic energy at the bottom...
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...
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...
Science
An empirical formula of a compound is CH2O and the molecular weight of the compound is 180.18. What is the molecular...
The empirical formula of a chemical compound is CH2O. The molar mass of carbon is 12, the molar mass of hydrogen is 1 and the molar mass of oxygen is 16. The empirical formula of a compound is the...
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...
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...
Science
What type of asexual reproduction does a potato use?
Sexual reproduction, something that is more familiar to humans as it is how humans replicate, requires two parents (or gene sources) contributing genetic information to an offspring that will be...
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 =...
Science
What are the six characteristics animals share?
According to the biologists Gerald and Teresa Audesirk, all members of the animal kingdom have six characteristics in common. They are as follows: All animals are made up of cells that do not have...
Science
What are the advantages and disadvantages of electroplating?
Electroplating is the process of plating one metal over another. It is done for various purposes, most commonly for imparting corrosion resistance and decorative appearance. There are a number of...
Science
Difference Between Dialect And Register
Dialect is a special form of speaking belonging to a group. Register is a linguistic term used to describe changing how one talks based on the situation. I will be using To Kill a Mockingbird by...
Science
the speed of light is 3.0x10^8 m/s. how long does it take light to reach the earth from the sun, which is 1.5x10^11m...
This question can be solved using the classic equation of motion: distance = velocity * time. We have two known parameters and one unknown parameter; however, in order to solve the problem we must...
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....
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...
Science
What body systems are used when running and how do they work together?
A number of body systems are used when we are running. These systems include the nervous system, skeletal system, muscular system, respiratory system and the circulatory system. When we decide to...
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...
Science
What are the six factors that affect climate?
It's important to distinguish between temperature and climate (there seems to be some confusion in the wording of the question). There are six kinds of climate but the main factors that affect (or...
Science
What are the five main types of precipitation?
Precipitation, in the simplest terms, is the process by which water, contained in the clouds, falls down under the influence of gravity. There are several forms of precipitation, including rain,...
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...
Science
What are the steps for testing non-reducing sugar?
Non-reducing sugars do not have the aldehyde group and so they cannot reduce copper sulphate like reducing sugars would do when tested with the Benedict’s reagent. To test for non-reducing sugar,...
Science
What are advantages and disadvantages of classification?
There are many advantages to classification, both in science and "out" of it. Classification allows us to see relationships between things that may not be obvious when looking at them as a whole....
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...
Science
Why is a parallel circuit used in household wiring?
Parallel circuits are used in homes because the loads can be operated independently of each other. That means that you can have an electrical item turned on and running without needing to have all...
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...
Science
What is the enthalpy for the reaction between Mg and HCl?
Mg reacts with HCl according to this equation: `Mg_((s)) + 2 HCl_(aq) -> MgCl_2_(aq) + H_2_(g)` If this reaction takes place under standard conditions the enthalpy change (∆Hº) can be...
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