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40 Cards in this Set
- Front
- Back
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Describe the Doppler Effect and how it occurs |
Motion of source cause the wavelength to change, which in turn causes the pitch of sound or the color of light to change |
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Describe “Red Shift” and what it tells us about our universe |
Galaxies are red shifted which tells us the universe is expanding. |
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When did the Big Band occur? |
13.7 billion years ago |
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Describe the life cycle of a star such as our sun |
Star Nebula -> Average Star -> Red Giant -> Planetary Nebula -> White Dwarf |
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What is the main force that keeps stars and galaxies together? |
Gravity |
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What determines the color of a star? |
Temperature |
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Force unit |
Newtons |
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What process is used to create a rainbow? |
Refraction |
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What is the bending of light? |
Refraction |
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An ocean wave bending around rocks as it comes into shore is an example of: |
Diffraction |
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As a wavelength gets shorter, what happens to the frequency? |
It gets higher |
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How can white light be separated into colors? |
By using a prism |
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How are light and sound waves different? |
Sound waves need a medium, or something to travel through |
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If the frictional force is greater than the applied force, will the object accelerate? |
No |
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PE and KE unit |
Joules |
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What types of radiation tend to be more dangerous and why? |
Shorter wavelength = higher energy=more dangerous to living cells. |
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____ energy is converted into ____ energy in a blender. |
Electrical -> mechanical |
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If the incident ray is 50 degrees, then the reflection ray will be ____ degrees. |
50 degrees (always the same) |
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When a ball is tossed up in the air, when will it have its greatest PE? |
Highest point |
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How is energy produced in the Sun? |
Nuclear fusion |
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What elements are involves in the process of fusion? |
Hydrogen (H), Helium (He) |
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Describe the difference between fusion and fission |
Fusion = Atoms combined, Fission = Atoms split |
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Describe the difference between potential energy and kinetic energy |
Potential = stored energy, Kinetic = moving energy |
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“If one bulb goes out, then they all go out” describes a ____ circuit. |
Series circuit |
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Energy is the flow of ____ |
Electrons |
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When an atom gains or loses electrons, it becomes an ____ |
Ion |
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Oxygen has 8 protons in its nucleus. The atomic number of oxygen is ____ |
8 |
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If a solution has a pH value of 9, it is considered a(n) ____ |
Base |
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Who do Nobel Gasses not react? |
Their outer electron shell is filled |
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Conservation of mass means
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Mass cannot be created nor destroyed |
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If an atom has 12 protons and 12 electrons, is it electrically neutral? Explain. |
Yes, positive charges equal negative charges |
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What is voltage? |
Electric Potential or the amount of “push” a current has is called the voltage. |
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The third step in the Scientific Method is: |
Form a hypothesis |
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Velocity units: |
m/s |
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Acceleration units: |
m/s ^2 |
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Milk is a ____ mixture |
Homogeneous |
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Describe the differences between ionic and covalent bonding |
Ionic-opposites attract. Covalent-shareelectrons |
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Draw the Lewis dot diagram for Chlorine. |
Cl with 7 dots |
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How many sigfigs? 0.007010 cm |
4 |
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Describe what the H-R Diagram tells us about star groups. |
Temp vs luminosity. 4 main groups of stars. |
