Objective 1
1) Fahrenheit, Celsius, and Kelvin
2) Thermal energy relates to temperature and heat because heat is the transfer of thermal energy from an object with a higher temperature to an object with a lower temperature.
3) Having specific heat means having the amount of heat that's needed to raise the temperature of one kilogram by one Kelvin gram.
4) An ice cube melts in your hand because the heat from your hand is transferring to the ice cube and it is causing the ice cube to heat up and melt.
5) Some materials get hotter than others faster because the object either contains a lot of moisture, or if the object has a lower specific heat. (If the material had a higher specific heat, it would take a long time for it to heat up)
source 1
source 2
Objective 2
1) Thermometers measure temperature by using Mercury inside of it, which get bigger when the temperature goes up, and gets smaller when the temperature is colder or gets lower.
2) The three types of temperature are alike because they all measure temperatures, but they're different because they all have different ways to measure the temperature.
3) 5 degrees C = 41 degrees F
4) 860 degrees F= 460 degrees C
5) 209,000 joules
source 1
source 2
source 3
Objective 3
1) The three forms of heat transfer are conduction, convection, and radiation.
2) Heat always moves
3) Conductors and Insulators are different because conductors transfer thermal energy well, but insulators don't transfer thermal energy well.
4) A copper pipe would work better as a conductor because conductors transfer
thermal energy in a metal a lot easier than other things.
5) To keep warm, I would first create a fire. Then, I would heat blankets by the fire. Then I would stay in the warm blankets :) Creating the fire is conduction, and heating the blankets would also be conduction.
Objective 4
1) Matter causes state because of pressure, temperature, or heat.
2) The particles of the substance begin to move faster, causing the substance to heat up.
3) The temperature stays the same when the state of matter changes because the energy is being used to transform the matter, in stead of being used to change the temperature of the matter.
4) Solids melt when they reach an extreme temperature, just like any other substance.
5) You should poke holes in a baked potato before baking it because the steam and heat from the baked potato will be kept inside of the potato, causing it to over heat and EXPLODE.
source 1
source 2
source 3
source 4
Objective 5
1) Heat engines use thermal energy to create mechanical energy from the thermal energy.
2) Internal combustion engines are different from external combustion engines because internal uses the fuel in a cylinder directly, but external uses an outside boiler to heat and then use the fuel. They're similar because they are both used on transportation vehicles today.
3) Cars use internal combustion engines because it would be difficult to drive down the road with an external combustion engine on the side of your car. This could cause many driving problems. (or that's what I think)
4) Inside of the refrigerant, liquid turns into a gas. This is to chill the items in the fridge without giving them frost or creating ice on them.
5) If the compressor in a fridge stopped working, then it would affect the heat transfer system because the heat of pressurization wouldn't have anywhere to go, and the fridge would heat up.
source 1
source 2
source 3
Thursday, November 18, 2010
Thursday, November 11, 2010
Science HW part dos
Objective 4
1) The thermal energy particles on a warmer day are moving around more and which causes it to be hotter. The thermal energy particles on a cold day are not as active, therefore it is cold.
2) Ice cream melts on a warm summer day because the thermal particles of the ice cream are not moving quickly, but then the heat from the fast moving particles in the air cause the ice cream particles to move quickly, and then it starts to melt.
3) Vibrating particles have to do with the boiling point of particles because the hotter the particles get, the faster they move, so when they boil, they are at TOP SPEED.
4) Condensation occurs when water turns from a gas directly to a solid. This can happen when water vapor touches a cold bottle or glass.
5) Sublimation happens when air saturated with water hits a sudden point of temperature that is below freezing.
Objective 5
1) In Boyle's law, the relationship described is between pressure and volume. It states that if the volume goes up, pressure goes down, and when volume goes down, pressure goes up.
2) Scientist only half fill high altitude balloons because the higher the pressure is then the smaller the balloon is going to be, so the balloon only needs half as much air as it would in a normal area.
3) pV=k is the mathematical equation, and the formula is when the amount of volume goes up then the pressure goes down, and when the volume goes down, the pressure goes up.
4) Boyle's law applies to physicians because the temperature of your body also applies to the law so if your temperature goes up your blood pressure goes down and when your temperature goes down your blood pressure goes up.
5) Scuba divers rely on Boyle's law because when the divers go down, their amount of pressure in their tanks and in their body will go up, and it seems that the air tanks are releasing air. Really the air tanks are expanding because when the pressure increases, the volume decreases. Sometimes you can notice this happening with your wet suit too, but it is most noticeable with the air tank.
Objective 6
1) Charles's law is the law that states when volume goes up, temperature goes up, and when volume goes down, temperature goes down too.
2) quickly
3) Etienne Montgolfier was the first person to fly in a hot air balloon.
SOURCE 1
SOURCE 2
SOURCE 3
SOURCE 4
SOURCE 5
SOURCE 6
SOURCE 7
1) The thermal energy particles on a warmer day are moving around more and which causes it to be hotter. The thermal energy particles on a cold day are not as active, therefore it is cold.
2) Ice cream melts on a warm summer day because the thermal particles of the ice cream are not moving quickly, but then the heat from the fast moving particles in the air cause the ice cream particles to move quickly, and then it starts to melt.
3) Vibrating particles have to do with the boiling point of particles because the hotter the particles get, the faster they move, so when they boil, they are at TOP SPEED.
4) Condensation occurs when water turns from a gas directly to a solid. This can happen when water vapor touches a cold bottle or glass.
5) Sublimation happens when air saturated with water hits a sudden point of temperature that is below freezing.
Objective 5
1) In Boyle's law, the relationship described is between pressure and volume. It states that if the volume goes up, pressure goes down, and when volume goes down, pressure goes up.
2) Scientist only half fill high altitude balloons because the higher the pressure is then the smaller the balloon is going to be, so the balloon only needs half as much air as it would in a normal area.
3) pV=k is the mathematical equation, and the formula is when the amount of volume goes up then the pressure goes down, and when the volume goes down, the pressure goes up.
4) Boyle's law applies to physicians because the temperature of your body also applies to the law so if your temperature goes up your blood pressure goes down and when your temperature goes down your blood pressure goes up.
5) Scuba divers rely on Boyle's law because when the divers go down, their amount of pressure in their tanks and in their body will go up, and it seems that the air tanks are releasing air. Really the air tanks are expanding because when the pressure increases, the volume decreases. Sometimes you can notice this happening with your wet suit too, but it is most noticeable with the air tank.
Objective 6
1) Charles's law is the law that states when volume goes up, temperature goes up, and when volume goes down, temperature goes down too.
2) quickly
3) Etienne Montgolfier was the first person to fly in a hot air balloon.
SOURCE 1
SOURCE 2
SOURCE 3
SOURCE 4
SOURCE 5
SOURCE 6
SOURCE 7
Wednesday, November 10, 2010
Science HW part uno
Objective 1
1) The mass of the matter stays the same anywhere, but the weight of the matter could change depending on where it is.
2) 619.65 cm cubed
3) g/cm cubed
4) D= mass/volume
5) length x width x height
Objective 2
1) A physical change changes the state that the substance is in. It does not create a new a new substance. A chemical change can create a new substance and does happen on a molecular level.
2) Four ways that you can tell tell that a chemical reaction has taken place is it has changed colors or scent, its presence has changed, or its temperature has changed.
3) The law of conservation of mass was created by a French Chemist named Antoine Lavoisier in 1789. The law states that mass can and is not created/destroyed during a chemical reaction. Basically when a chemical reaction occurs, the starting and ending mass are the same amounts.
4) Temperature and Thermal energy are different because temperature is the measure of thermal energy in a substance.
5) An example of an endothermic reaction is ice cubes melting. An example of an exothermic reaction is condensation of rain water from water vapor or a cloud.
Objective 3
1) Thermal energy, kinetic energy, electric energy, electromagnetic energy, potential energy and chemical energy.
2) Kinetic energy
3) Potential energy
4) Electromagnetic energy is the energy of radiation.
5) It is chemical energy, and an example of chemical energy is plant photosynthesis.
SOURCE 1
SOURCE 2
SOURCE 3
SOURCE 4
SOURCE 5
SOURCE 6
SOURCE 7
SOURCE 8
1) The mass of the matter stays the same anywhere, but the weight of the matter could change depending on where it is.
2) 619.65 cm cubed
3) g/cm cubed
4) D= mass/volume
5) length x width x height
Objective 2
1) A physical change changes the state that the substance is in. It does not create a new a new substance. A chemical change can create a new substance and does happen on a molecular level.
2) Four ways that you can tell tell that a chemical reaction has taken place is it has changed colors or scent, its presence has changed, or its temperature has changed.
3) The law of conservation of mass was created by a French Chemist named Antoine Lavoisier in 1789. The law states that mass can and is not created/destroyed during a chemical reaction. Basically when a chemical reaction occurs, the starting and ending mass are the same amounts.
4) Temperature and Thermal energy are different because temperature is the measure of thermal energy in a substance.
5) An example of an endothermic reaction is ice cubes melting. An example of an exothermic reaction is condensation of rain water from water vapor or a cloud.
Objective 3
1) Thermal energy, kinetic energy, electric energy, electromagnetic energy, potential energy and chemical energy.
2) Kinetic energy
3) Potential energy
4) Electromagnetic energy is the energy of radiation.
5) It is chemical energy, and an example of chemical energy is plant photosynthesis.
SOURCE 1
SOURCE 2
SOURCE 3
SOURCE 4
SOURCE 5
SOURCE 6
SOURCE 7
SOURCE 8
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