Unit 7 Flashcards
Which pictures show the same type of thermal energy transfer?
The stove and the iron
Concept 3 pg 19
Plastic is an example of_
Insulator
Concept 3 pg 19
Transfer of energy by the movement of heated particles
Convection
Concept 3 pg 19
Green plants convert light energy from the sun into ____ during photosynthesis.
Chemical potential energy
Concept 3 pg 3
As the time required to do a given amount of work decreases, the power developed
It increases
Concept 2 pg 11
Through which of the following will convection most likely occur?
Liquids and gases
Concept 4. Pg 26
When an object is dropped what happens to potential and kinetic energy as it falls?
GPE goes down and me goes up
Concept 1 pg 3
When you hold an ice cube, your hand feels cold because
Because heat flows from your hand to the ice cube
Concept 3 pg 19
The diagram to the right shows four locations in a temperature field. The temperature of each location is given in degrees Celsius. Heat energy will normally flow from:
20 to 35oC
Concept 3 pg 19
A material that resists/limits the flow of heat by conduction, convection, and radiation is a(n) ____.
Insulator
Concept 3 pg 19
The mechanical energy of a coconut falling from a tree ____.
Remains constant
Concept 2 pg 10
A constant force of 2.0 N is used to push a 3.0 kg box 4.0 m across the floor. How much work is done?
8J
Concept 4 pg 26
A medicine ball has 10 J of energy and is thrown upward with a velocity of 2 m/s. What is its mass?
5kg
Concept 1 pg 3
Amount of heat needed to raise the temperature of 1 kg of a material by 1 °C.____
Specific heat
Concept 3 pg 20
Temperature measures the average ____ of the particles in a material.
Kinetic energy
Concept 1 pg 3
