A student holds an ice cube in her hand. After some time passes, the ice cube begins to melt. Which word describes the process of heat transfer?

• conduction
• convection
• insulation
• radiation

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

NGSS.MS-PS3-5

On a sunny day, Yolanda fills a small backyard pool with water. As time passes, the water warms. Which statement explains this effect?

• The sun heats the water through gravity.
• The sun heats the water through radiation 
• The sun heats the water through convection.
• The sun heats the water through conduction.

Tags

NGSS.MS-PS1-4

Melinda is trying to understand the difference between heat and temperature. She records some ideas. Which statement is correct?

• Heat and temperature are synonyms. 
• Heat and temperature are antonyms.
• Heat is a measure of the hotness or coldness of an object, and temperature is the transfer of energy between objects. 
• Heat is the transfer of energy between objects, and temperature is the measure of heat energy.

Which of the following is capable of generating heat?

• attraction
• repulsion
• friction
• gravity

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Each picture shows a source of heat. Which heat source transfers heat energy through radiation?

• the sun
• boiling water
• ice cube melting
• stirring hot liquid

• Heat from the hot liquid will warm the spoon until the spoon is hotter than the liquid. 
• Heat from the hot liquid will warm the spoon until they are both the same temperature.
• Heat from the hot liquid will warm the spoon, but the liquid will remain hotter than the spoon. 
• Heat from the hot liquid will not have any effect on a metal spoon, so the spoon will remain cool. 

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-5

Lu Shen is trying to understand convection. She sees some notes and wonders which to believe. Which statement is correct?

• Convection happens when the sun warms Earth. 
• Convection happens when two solids transfer heat energy. 
• Convection happens when liquids and gases transfer heat energy.
• Convection happens when heat energy is transferred without matter to carry it. 

• electric charge 
• electric current
• static electricity
• electrostatic discharge

An electron has a negative charge. What is true about the charge of a particle that is attracted to an electron?

• It is positive.
• It is negative.
• It is neutral.
• It is repulsive.

Tags

NGSS.MS-PS2-3

What is the main difference between an electric current and static electricity?

• Electrons in an electric current move by electrostatic discharge.
• Electric charges flow in an electric current but not in static electricity.
• Static electricity occurs in at least two objects. An electric current occurs in only one.
• Negative charges form static electricity. An electric current involves positive charges.