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This or That
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Energy
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Change
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Scientific Method
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Vocab
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Grab Bag
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This or That Energy Change Scientific Method Vocab Grab Bag $100 $100 $100 $100 $100 $100 $200 $200 $200 $200 $200 $200 $300 $300 $300 $300 $300 $300 $400 $400 $400 $400 $400 $400 $500 $500 $500 $500 $500 $500
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Physical or Chemical Property?
Odor
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Odor is a physical property.
You can observe it without the presence of a chemical reaction. You can smell coffee without observing a chemical reaction.
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Pure substance or Mixture?
24K gold
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24K indicates all gold atoms Any other carat is an alloy (14K)
Pure substance 24K indicates all gold atoms Any other carat is an alloy (14K)
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0K or 0°C Which is colder?
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Zero Kelvin, that’s absolute zero
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Homogeneous or Heterogeneous Mixture
5% vinegar solution?
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You can only see one phase (uniform composition)
Homogeneous Mixture You can only see one phase (uniform composition)
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Cp tin=.228J/g°C Cp copper=.388J/g°C
Which contains more heat: 1g of tin heated 1 degree or 1g of copper heated 1 degree?
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If the temperature raised a degree it must have absorbed .388J
Copper If the temperature raised a degree it must have absorbed .388J
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State the Law of Conservation of Energy.
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Energy cannot be created or destroyed, only transferred.
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Name at least 5 types of energy.
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Chemical Nuclear Kinetic Potential Sound Solar Electrical Light Heat
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Endothermic or Exothermic
Baking bread?
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Baking bread is an endothermic reaction
Energy is absorbed into the bread. Energy is needed for the “rising” to occur.
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The energy given off when bonds are broken is an example of __________.
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Chemical Energy
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Which particle model has more kinetic energy?
b. Which is an element?
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There is less order so this one has more K.E.
This is the element.
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Briefly describe the heat transfer when someone gets into a cold swimming pool.
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Heat from your body is transferred into the colder pool.
Cold is NOT transferred to your body.
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Chemical or physical change
Dissolving sugar?
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No change in composition occurs
Physical change No change in composition occurs
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Exothermic or Endothermic?
Condensation
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Exothermic Condensation is gas to liquid…
there is less energy in a liquid than a gas, so energy must have been released.
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One base unit is the meter. Give an example of a modified base unit.
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Any base unit with a metric prefix. Ex. Millimeter,mm
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This type of change indicates
Mute before playing This type of change indicates a chemical reaction. What is it? *note-movie is off the top of the screen to hide the answer.
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A precipitate $200 for color change answer only
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An inactive sugar pill is a ____________.
It helps determine whether the subjects mind was the independent variable
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placebo
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In this type of experiment, it is unknown to the researcher whether the subject is receiving a placebo or an active drug.
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A double-blind experiment
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Sleep studies were done on women who were having nightmares.
It was found that they were all eating Ben and Jerry’s Ice Cream 10 minutes before bed. What is the dependent variable?
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The occurrence of nightmares
The IV effects the DV.
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Researchers found a correlation between males age and high death rates. What variable would be changed for the control group?
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Either: Males above age 24 Females age 15-24
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Males age tend to have higher mortality rates due to their risky behaviors. Name 3 other variables that would affect the dependent variable.
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Distance traveled to school/work, parents, type of food they eat, genetics, disease, bad luck
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Explain the difference between mass and weight.
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Mass is the amount of matter.
Weight is the force produced by gravity acting on mass.
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Define kinetic energy then define potential energy.
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K. E. - the energy of motion. P. E
K.E.- the energy of motion. P.E.- the energy of position; stored energy
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Which term describes the energy that is transferred between two objects?
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Heat describes the energy that is transferred between two objects.
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Define specific heat capacity.
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Specific heat capacity is the amount of energy that is required two raise 1 gram of a substance 1°C.
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Daily Double!! Click here for question
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Fill in the blanks with terms
Fill in the blanks with terms. In scientific experiments, the ______ effects the _____.
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The independent variable effects the dependent variable.
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Convert 155K to °C
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155K – = °C
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What is this an example of?
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A heterogeneous mixture.
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Name 4 characteristics of a gas.
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Compressible, High K.E., Variable volume, Variable shape Free to flow
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Using the definitions of temperature, average, and evaporation explain how it is possible for an ice cube to evaporate in the freezer.
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Temperature is the average K. E. of a substance
Temperature is the average K.E. of a substance. In this case, average means some particles are moving faster than average (some slower). The faster particles have enough energy to break free from the surface (evaporation).
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Say and spell your teacher’s name
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Czyryca
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Double Jeopardy!!
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Write the Final Question Here
Jeopardy Write the Final Question Here
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Write the Final Answer Here
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