Investigating Heat 5th

Makiah puts red dye in a beaker filled with water. The red dye will spread most quickly in

• hot water

• warm water

• cold water

Two substances are combined. Substance A has a temperature of 20 degrees. Substance B is combined with Substance A and the temperature rises to 40 degrees. Which reaction took place?

• Exothermic reaction because it released heat

• Endothermic reaction beccause it absorbed heat

Which temperature has the lowest kinetic energy?

• 50 degrees Celcius

• 80 degrees Celcius

• 60 degrees Celcius

• 95 degrees Celcius

Which temperature has the highest kinetic energy?

• 50 degrees Celcius

• 70 degrees Celcius

• 80 degrees Celcius

• 95 degrees Celcius

Which is the best explanation for why the body perspires (sweats)?

• As perspiration evaporates, it cools the body

• Perspiration drains the body of its cool liquids

• As perspiration is produced, the warmth of the body is pushed inside the body

Which would be the best conductor?

• Object A had a temperature change from 22 degrees Celcius to 40 degrees Celcuis

• Object B had a temperature change from 22 degrees Celcius to 23 degrees Celcuis

• Object C had a temperature change from 22 degrees Celcius to 50 degrees Celcuis

Which would be the best insulator?

• Object A had a temperature change from 22 degrees Celcius to 39 degrees Celcuis

• Object B had a temperature change from 22 degrees Celcius to 23 degrees Celcuis

• Object C had a temperature change from 22 degrees Celcius to 40 degrees Celcuis

What is the correct rate of heat transfer for a high temperature of 40 and a low temperature of 20 in 10 minutes?

• 2

• 4

• 8

• 20

What is the correct way to calculate rate of heat tranfer?

• High temperature - low temperature

• (high temperature - low temperature) / time

• (High temperature x low temperature) / time

• High temperture / time

What happens when you place an alcohol thermometer in a beaker of hot water?

• the level of the alcohol rises

• the level of the alcohol falls

• the level of the alcohol stays the same