Kaydyn Dillbeck IDLA Physical Science 10/26/14 Questions for U4A1 Section 1: 1. Kinetic molecular theory- used to explain the behavior of gases and is based upon the following postulates: • Gases are composed of a many particles that behave like hard spherical objects in a state of constant, random motion. • These particles move in a straight line until they collide with another particle or the walls of the container. • These particles are much smaller than the distance between particles, therefore the volume of a gas is mostly empty space and the volume of the gas molecule themselves is negligible. • There is no force of attraction between gas particles or between the particles and the walls of the container. • Collisions between …show more content…
Matter is made up of atoms; atoms are made of positively charged protons, neutral neutrons, and negatively charged electrons. 3. The measure of space that the molecules occupy (volume) is derived from the space in between the molecules and not the space the molecules contain themselves. 4. The motions for: • Solid- are not able to move out of their positions relative to one another, but do have small vibrational movements. • Liquid- is able to move past each other. • Gas- move quickly and are able to spread apart from one another. 5. Bulb thermometers contain mercury and/or alcohol. Mercury and alcohol grow when the temperature is heated and shrink when it cools. The liquid contained inside has no choice but to move upward and downward as the temperature creates the substances to grow or shrink. 6. Thermometers have a large bulb and a narrow tube to accentuate the change in volume. 1. Fahrenheit- • Used in the United States • 32 degrees is the freezing point of liquids • 212 degrees is the boiling point of …show more content…
Radiation- the emission of energy as electromagnetic waves or as moving subatomic particles, especially high-energy particles that cause ionization. 13. Sunlight is a form of radiation that is radiated through space to our planet without the aid of fluids. 14. The sun transfers heat through radiation of space. 15. Conduction is not responsible for bringing heat to Earth because there are no liquids in space. 16. Radiation brings heat to our planet. 17. Radiometer- an instrument for detecting or measuring the intensity or force of radiation. 18. Thermal creep- more severe in materials that are subjected to heat for long periods, and generally increases as they near their melting point. 19. Heat escapes quickly from the black sides of the vanes. Thus, the black molecules cool off first. Meanwhile, the white molecules take longer to lose heat and cool down. The result is that gases from the white vane push off with more force (Newton's third law) and the vanes spin in the opposite direction. 20. 10 things: 1) Furnace- keeping it clean 2) Thermostat- lower the heat 4-5 degrees while sleeping or if no one is home 3) Laundry- run with cold water 4) Door frames- sealant or caulk around the crack 5) Windows- plastic window cover to trap in
The temperature probe was then quickly cooled to room temperature. When this was achieved, the hot water was immediately transferred into the calorimeter. This method of keeping the temperature probe cooled before measuring a new temperature was repeated throughout the entire experiment. Temperature data was collected for 180 s while swirling the temperature inside the calorimeter. The calorimeter still contained the warm water.
Our latest lab covered a detailed description of atoms and molecules, laid out in a distinctive way using balls and sticks for valence electrons and bonds. We were given charts to fill out recoding our findings regarding several molecules and their electron count, type of bonds,
All matter is made of particles called atoms. An atom is smallest unit of matter. A matter can be solid, liquid or gas. When a group of atoms bond together this makes a molecule. The molecule is the base of chemical compounds that is involved in chemical reactions.
Density is the calculation or equation of mass divided by volume and it can be used to identify different substances. Density is always the same in one object or substance because density is a constant ratio. Objects have “lighter” densities will float while objects that are “denser” will
It is being changed by a ball in a oven to make it hot or a ball in the freezer to make it cold. Temperature can be measured by
Atoms are the basic building blocks of all matter(Doc.3). These small particles have a nucleus and a certain number of protons ,neutrons ,and electrons(O.I). The number of protons is independent to the element, and can be used to find it on the periodic table(Doc.2). Protons are positively charged particles(Doc.3).
Solids, liquids and gases are the commonly known states of matter that consist of distinguishable physical properties. A solid has a fixed volume and shape consisting of rigid particles locked into place. Because a solid’s particles have little free space to slide past one another, solids are not easily compressible and do not flow easily. An example of a solid is a couch. A
A Radioactive isotopes undergo a process of “radioactive Decay” there are three types of decay the first being Alpha, beta and Gamma Radiation. Each form of radioactive decay is different; Alpha radiation is produced by an atom in the form of two protons and two neutrons, and is often called a Helium atom, even though it does not have the properties of Helium. Throughout the beta decay process, an electron is released from the atom. Whereas Gamma radiation, is different in the way that it is not a particle, but pure energy.
Chapter 2- Heating Earth’s Surface and Atmosphere : Chapter 3- Temperature : Chapter 1- Introduction to Atmosphere Chapter 2 connects with temperature well. The sun’s rotation and revolution are the reasons for seasons which is also the reason for changes in temperature. In Chapter One we learned about the atmosphere specifically and without the atmosphere, there would be no changes in temperature.
There are several gas laws including Boyle’e law, Charles’s Law, Avogadro’s Law, Lussac’s law and the ideal gas law. All the gasses in someway obey these laws. In order to understand how and why gases behave and are influenced by we must understand the gas laws. In 1811 Avogadro’s research led to the discovery of his law which states that the number of moles are proportional to the volume of a gas at a constant temperature and pressure.
Also, salt is an ionic compound and not a polar covalent compound, even though it did not melt last, due to the fact that the elements Na and Cl, both lose or gain an electron and then bond because of their opposite charges, which is a property only ionic bonds possess. The wax was the only substance whose results were synonymous with my hypothesis, since it required a low temperature for its melting point and was not soluble in water, both properties of nonpolar covalent compounds. Potential sources of error included not labeling the spots each substance was placed in the aluminum foil boat, seeing as the result for sugar seemed to be the correct conclusion for salt and vice versa. A future experiment would involve individually testing each substance in an aluminum foil boat, of the same brand, on a heat plate in order to avoid uncertainty. Each substance should be timed to record the precise time each substance began to melt or burn.
A liquid has indefinite shape, definite volume, and no compressibility. In addition, gas has indefinite shape, indefinite volume, and compressibility. Furthermore, in order to identify elements, one will have to look at the atomic number, therefore, establishing the number of protons. Last but not least, a chemical change is a change in a substance
Radioactive material can result in burns, toxicity, increased rates of cancer, decay of the bones and diseases of the blood. Radioactivity is tasteless and odorless and encourages the change of electrical charges in the body. If exposed to enough radiation it allows cells to freely convert into cancer cells. Humans have the ability to handle a specific amount of radioactivity before deemed dangerous. A nuclear reactor releases a small amount of radioactive particles into the atmosphere during normal function.
There are many complicated ways to describe the atomic model, quantum physics and nuclear physics but this is that fast track plane language version. This is a short and sweet explanation of how we know that stars are made of an atom called hydrogen. This will also explain what atoms are and how we know that. All things that we can see are made up of atoms. Atoms are made of protons, neutrons and electrons.
Radiation can be defined as the energy travelling through space which comes from a source and may be able to penetrate various materials. There are two types of radiation and they are the non-ionizing and ionizing radiation. Non-ionizing radiation consists of light, radio and microwaves. Whereby ionizing radiation can produce charged particles in matter, and ionizing radiation is produced by unstable atoms. The difference between unstable atoms and stable atoms is that unstable atoms have an excess of energy or mass or both.