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WorksheetsHeat
Total questions: 26
Worksheet time: 1hrs 5mins
Name
Class
Date
1.
Heat transfers from ______ objects to cold objects.
a)
Cold
b)
Hot
c)
Convection
d)
Radiation
2.
What type of heat transfer happens in liquids and gases?
a)
Conduction
b)
Convection
c)
Radiation
3.
Touching hot sand is....
a)
Conduction
b)
Convection
c)
Radiation
4.
Hot air ______ while cool air ____
a)
Sinks, Rises
b)
Rises, Rises
c)
Rises, Sinks
d)
Convection, Radiation
5.
Hot air rising from a campfire is...
a)
Conduction
b)
Convection
c)
Radiation
6.
Boiling water is an example of what two types of heat transfer
a)
Conduction and Radiation
b)
Conduction and Convection
c)
Radiation and Convection
7.
Rubber is considered an _____
a)
Conductor
b)
Insulator
c)
Radiation
d)
None of the above
8.
Sun tanning is an example of....
a)
Conduction
b)
Convection
c)
Radiation
9.
Which of the following is not a conductor
a)
Wood
b)
Copper
c)
Iron
d)
Silver
10.
Energy that is transferred from hotter objects to cooler objects is...
a)
Thermal/Heat
b)
Temperature
c)
Electricity
d)
Conduction
11.
Which of the following is not an example of convection
a)
Cool breeze coming off the ocean
b)
Water boiling when you make Mac & Cheese
c)
A fireplace heating up a room
d)
Lighting a candle
12.
What is the formula to calculate heat energy required to raise the temperature of any substance?
a)
Q = m Cp ∆T
b)
Q = m Cp
c)
Q = ½ m v
d)
m = Q Cp
13.
There are four cups of hot cocoa. The cup sizes are shown. The temperature of the cocoa in each cup is 25 degrees celsius. Which cup has the MOST thermal energy?
a)
Large cup (Trenta)
b)
Small cup (Tall)
c)
Venti
d)
All three are the same temperature so they have same thermal energy
14.
How many joules of heat are needed to raise the temperature of 10.0 g of aluminum from 22°C to 55°C, if the specific heat of aluminum is 0.90 J/gx°C?
a)
297 Joules
b)
0.003 Joules
c)
297 J/gx°C
d)
0.003 J/gx°C
15.
When a piece of aluminum foil is taken out of the oven and cools from 100° to 50°, What is the change in temperature?
a)
50°
b)
0°
c)
100°
d)
150°
16.
What is the formula to calculate heat energy required to raise the temperature of any substance?
a)
Q=mc∆t
b)
Q=mc
c)
Q= ½mv
d)
m=QC
17.
Specific heat is....
a)
The measure of kinetic energy of an objects particles
b)
A measure of the energy needed to increase the average kinetic energy of the particles
c)
The heating caused by the motion of flluid due to temperature difference
d)
The transfer of energy by electromagnetic radiation
18.
How many Joules of energy are required to change 10 gram of liquidwater from 20 C to 90 C?
a)
1400 J
b)
2800 J
c)
210,000 J
d)
1,400,000 J
19.
20 g of water. specific heat of water is 4.18 J/x°C. temperature changes from 25° C to 20° C, how much heat energy (Q) moves from the water to the surroundings?
a)
418 Joules
b)
209 J
c)
83 J
d)
4.18 J
20.
If 200 grams of water is to be heated from 24.0° C to 100.0° C to make a cup of tea, what is the mass and what is the change in temperature?
a)
m=200g
∆t= 66
∆t= 66
b)
m=200g
∆t=124
∆t=124
c)
m=200
∆t=100
∆t=100
d)
m=200g
∆t=76
∆t=76
21.
The specific heat(c) of copper is 0.39 J/g °C. What is the temperature change(∆t) when 100 Joules of heat(Q) is added to 20 grams?
a)
12.82 °C
b)
24.12°C
c)
351 °C
22.
The air consists of a variety of substances at room temperature.
Assuming each substance has exactly the same temperature, which molecule will have the greatest magnitude of velocity?
Assuming each substance has exactly the same temperature, which molecule will have the greatest magnitude of velocity?
a)
Methane
b)
Nitrogen
c)
Oxygen
d)
Argon
23.
In the lab, a student places a 5 kg container of water on a hot plate. The heating of the water is constant. The student records the temperature and graphs it as a function of time on the graph below:
On the above graph, at which point will the molecules have the greater velocity
On the above graph, at which point will the molecules have the greater velocity
a)
A
b)
B
c)
D
d)
E
24.
For object A to have a higher absolute temperature than object B, which of the following must object A have?
a)
Higher average internal kinetic energy
b)
Greater mass
c)
Higher average internal potential energy
d)
Greater specific heat
25.
As the temperature of a confined gas rises, which of the following characteristics of the gas molecules increases?
a)
Size
b)
Number
c)
Density
d)
Average speed
26.
Near the ceiling of a room the air is warmer; the warm air rises because of
a)
conduction
b)
convection
c)
radiation
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