Show:
Mendeleyev
Einstein
deGrasse Tyson
Hawking
Sagan
100
What is the smallest piece of a substance that is still that substance?
atom
100
What is it called when force is used to decrease a volume of gas?
compression
100
Ali found the average amount of kinetic energy in his cup of hot cocoa. What did he measure?
temperature
100
What is the unit that is used to measure energy?
calorie
100
What is it called when a solid breaks apart and moves into a liquid?
dissolves
200
What is it called when a liquid turns to a gas?
evaporation
200
What is it called when particles are heated with more kinetic energy, move faster, spread farther apart, and take up more space?
expansion
200
What is something that can be dissolved called?
soluble
200
This theory says that energy is never created or destroyed during energy transfer.
conservation of energy
200
What is a solid that dissolves in a solution?
solute
300
What is it called when a gas turns to a liquid?
condensation
300
What is it called when a substance is cooled, the particles move slower, the particles move closer together, and the particles take up less volume?
contraction
300
Rhea put a pan hot off the stove into a sink of cold water. After 15 minutes the pan and water were the same temperature. The system reached had reached _____________
equilibrium
300
What is energy transfer as a result of collisions between particles?
conduction
300
What is the liquid that the solute dissolves into?
solvent
400
Izzy was babysitting. The little kinderbeaner she was babysitting left the door of the refrigerator open. Explain how energy transferred in this situation.
Energy transfers from high energy to low energy. The air outside the refrigerator was warm and had high energy. The air inside the refrigerator was cold and had low energy. The warm air from outside transferred energy to the cold air inside the refrigerator.
400
What is the energy of motion? This energy is related to heat.
kinetic energy
400
What is the ratio of solute to solvent in a solution?
concentration
400
What is the movement of energy from a location of more energy (hot) to a location with less energy (cold)?
energy transfer
400
What is the result of a solute dissolving into a solvent?
solution
500
Sandy had a 20 g chunk of granite. It was 17 degrees. She put it in the freezer for 5 minutes. When she took it out it was 12 degrees. How much energy (in calories) transferred away from the granite? Show your work on paper to earn credit.
-100 calories
500
Beeta couldn't get her new bike tire to fit onto the aluminum wheel. She put her wheel out in the garage where it was only 10 degrees F. The next morning she was easily able to get the tire onto the wheel. Why?
The metal bike wheel contracted from the cold. This made the atoms of aluminum move closer together. The wheel became smaller, so the tire fit.
500
Sati made 4 g sugar dissolve in 15 ml of water. Eva made 11 g of sugar dissolve in 45 ml of water. Whose solution is more concentrated? Show your work on paper to get credit.
Sati's is more concentrated.
500
This is the measurement of mass of a substance compared to its volume.
Density
500
What is it called when the limit of solute that will dissolve is reached in a solution?
saturate