Term
| What is the gravitational field at the center of Earth? |
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Definition
| Zero; As you fall you are begining pushed downward and upward. The downward force is balanced by the upward. |
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Term
| What happens to your weight in an elevator accelerating upward? |
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Definition
| Your weight becomes greater. |
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Term
| What happens to your weight in a free fall? |
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Definition
| There is no weight. Gravity remains but there is no support force, causing you to feel weightlessness. |
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Term
| Why do ocean tides occur? |
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Definition
| Ocean tides are caused by differences in the gravitional pull of the moon on the opposite sides of the earth. |
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Term
| Describe a lunar eclipse. |
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Definition
| At night, the moon can move into the earths shadow . This shadow is causes us not to be able to see the moon. |
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Term
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Definition
| During the day, the moon can move into the way of the sun and cast a samll shadow on a small part of earth. If you are there it looks like the sun has been totally eslipsed. |
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Term
| What tides occur during a solar eclipse? |
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Definition
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Term
| What are the two processes that keep the sun in exsistence? |
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Definition
| Gravitation and thermonuclear processes. |
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Term
| What are three qualities of a black hole? |
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Definition
| Massive, very dense, and has a large gravitational field. |
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Term
| What happens to the mass of a star when it collapses to form a black hole? |
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Definition
| All the mass is tightly pulled toward the center , it become infinitely dense and gravity becomes so strong that even light can't escape. |
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Term
| How mant high tides occur in a day? |
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Definition
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Term
| Compara the size of atom to the wavelength of visible light. |
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Definition
| Wavelengths can't hit an atom because atoms are so small. |
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Term
| What is formed when atoms combine? |
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Definition
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Term
| How many different elements are in a water molecule? |
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Definition
| Two atoms of hydrogen and one atom of oxygen. |
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Term
| What is the lightest atom? |
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Definition
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Term
| How many different types of atoms are there? |
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Definition
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Term
| What makes an element distinct? |
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Definition
| The number of protons or its atomic number. |
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Term
| Are compounds always molecules? |
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Definition
| No, there is ion compounds and molecule compounds. |
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Term
| The number of what two particules must be balanced in an electrically neutral atom? |
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Definition
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Term
| What is the biggest and smallest between these three? Nucleus, molecule, and a pronton |
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Definition
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Term
| Does a molecule have mass, energy, and structure? |
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Definition
| Yes it has all three. It is bonded in a welldefined way. |
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Term
| Does air have mass, energy, or weight? |
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Definition
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Term
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Definition
| Has a particular amount of neutrons in the nuclei of atoms. |
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Term
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Definition
| An ion is an atom with a net charge due to the gain or loss of electrons. |
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Term
| What is the charge on an ion with one less electron than proton? |
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Definition
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Term
| What determines how atoms conbine to form molecules, electrons, protons, or nucleons? |
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Definition
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Term
| What phase is most of the matter in the universe in? |
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Definition
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Term
| How many electrons can be in the innermost shell of an atom? |
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Definition
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Term
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Definition
| A regular geometric shape found in a soild in which the component particle arranged in an orderly, three dimensional repeating pattern. |
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Term
| What happens to the density of something when you squeeze it into a smaller volume? |
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Definition
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Term
| What happens to the density of something when you cut it in half? |
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Definition
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Term
| What is the density of a lake of water and a cup of that water? |
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Definition
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Term
| What happens to something the has double mass and it's volume is the same. |
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Definition
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Term
| Why are I beams used in construction? |
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Definition
| An i-beam is like a soild bar with some of the steal scooped from its middle where it is needed least. The beam is lighter with the same strength. |
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Term
| Why is steel an excellent construction material? |
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Definition
| Metal is a good conductor. |
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Term
| Compare pressure 1m deep in a lake and 1m deep in a pool |
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Definition
| The pool and the lake have the same pressure |
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Term
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Definition
| AN immested object is buoyed up by a force equal to the weight of the fluid displaces. |
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Term
| Compare bouyant force on the top of a submerged object vs. the top of it. |
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Definition
| There is more force and pressure on th bottom. |
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Term
| What will immested objects do that have a density greater than water? |
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Definition
| The weight of water that was displaced equals the bouyant force. |
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Term
| Wher is presuure transmitted in a fluid according to Pascals principle? |
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Definition
| When preesure is transmitted bottom to top according Pascals principle. |
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Term
| Compare forces, speed, and collinsions in a gas vs. a liquid. |
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Definition
| A gas has pressure and a liquid has a buoyant force ans speed of the molecules are faster in gas, so there are more collinsions. |
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Term
| What is at the top of a barometer? |
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Definition
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Term
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Definition
| An instrument used to measure atmospheric pressure, based on the movement of a lid of a metal box. |
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Term
| Describe the density of air, molecular collinsions, and temp. in tire. |
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Definition
| As you fill up the tire with air, you are cramming more and more air into the smaee volume of tire. This increase the density of air. density is proportional to density. |
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Term
| What two factors does boyles law relate? |
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Definition
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Term
| What is heavier a ballon filled with air or helium? |
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Definition
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