How does heat (thermal energy) flow?

• Always from cold to warm

• Always from warm to cold

• Both warm to cold & cold to warm

• It depends on the temperature

Tags

NGSS.MS-PS1-4

What is the equation for specific heat capacity?

• Q=mc∆t

• Q=mc

• Q= ∆mct

• m=QC

Tags

NGSS.MS-PS3-4

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?

• Large cup (Trenta)
• Small cup (Tall)
• Medium cup (Venti)
• All three are the same temperature so they have the same thermal energy

Tags

NGSS.MS-PS3-4

Copper, Stainless Steel, Carbon Steel, and Zinc were all heated using 10,000 JOULES of thermal energy. Using the chart, which material would have the LARGEST change in temperature and heat up the fastest?

• Copper

• Carbon Steel

• Zinc

• Stainless Steel

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

The specific heat of aluminum is 0.21 cal/g°C.  How much heat(Q) is released when a 10 g piece of aluminum foil is taken out of the oven and cools from 100° to 50°?

• 105 J
• 10.5 J
• 1.05 J
• 50 J

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

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 of copper?

• 12.82 °C
• 24.12°C
• 351 °C

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

The arrows in the picture below show several ways heat is transferred from the Sun as it strikes sand on the surface of a beach. Which arrow shows convection?

• 1

• 2

• 3

• 4

Tags

NGSS.MS-PS3-4

If you walk barefoot on hot asphalt, energy is transferred by which process?

• Convection

• Radiation

• Conduction

• Reflection

Vivian placed an ice cube in a tray of warm water. The following picture shows her investigation. Which statement describes the energy transfer that happens in Vivian’s investigation?

• Energy in the form of heat is transferred from the ice cube to the water by radiation.

• Energy in the form of heat is transferred from the water to the ice cube by radiation.

• Energy in the form of heat is transferred from the ice cube to the water by conduction.

• Energy in the form of heat is transferred from the water to the ice cube by conduction

Tags

NGSS.MS-PS3-4

NGSS.MS-PS3-5

Kumar is studying how Earth is warmed by sunlight. The following illustration shows his model of the sun and Earth.

Which process is mostly responsible for warming the soil in Kumar’s model?

• Conduction between the lamp and the soil causes the soil to warm.

• Convection currents between the lamp and the soil cause the soil to warm.

• Expansion of particles in the soil causes the soil to warm.

• Radiation from the lamp reaches the soil and causes the soil to warm.

Tags

NGSS.MS-PS3-3

NGSS.MS-PS3-4