Unit 2: Matter and Energy

When things are hot molecules are moving...

• Fast
• Slow
• They are not moving
• They are moving by not fast or slow

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

When things are cold molecules are moving...

• Fast
• Slow
• They are not moving
• They are moving by not fast or slow

Tags

NGSS.MS-PS1-4

Heat and Temperature are the same thing

• True
• False

Heat passes from...

• High to low
• Cold to hot
• Hot to cold
• Heat cannot be passed

Tags

NGSS.MS-PS3-4

NGSS.MS-PS3-3

Diagram above shows the heating curve of naphthalene. Why the temperature remains constant along BC and DE?

• Heat energy is used to increase the kinetic energy of molecules.
• Heat energy is used to break the inter molecular forces between molecules.
• Heat energy is lost to surrounding.
• Heat energy is used to build up  the inter molecular forces between molecules.

Tags

NGSS.HS-PS3-4

Which material would NOT make a good baking pan (for high temperatures in the oven)?

• aluminum
• plastic
• steel
• glass

Tags

NGSS.MS-PS1-4

A 15.75-g piece of iron absorbs 1086.75 joules of heat energy, and its temperature changes from 25°C to 175°C.  Calculate the specific heat capacity of iron.    

• 0.46 J/gx^oC
• 1.654 J/gx^oC
• 2,567,446.875 J/gx^oC

Tags

NGSS.HS-PS3-1

 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?    

• 297 Joules
• 0.003 Joules
• 297 J/gx°C
• 0.003 J/gx°C

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

When a  piece of aluminum foil is taken out of the oven and cools from 100° to 50°, What is the change in temperature?

• 50°
• 0°
• 100°
• 150°

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

The symbol for specific heat is .......

• c
• Q
• m
• t