What items will you need to measure?

Answer explanation

100 mL of water

200 mL of water

Temperature of both

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

What equipment will you need?

Answer explanation

Hot Water

Cold Water

Electric hot plate

Temperature Probe

3 beakers (containers)

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

NGSS.MS-PS3-5

What is the correct order for the procedure?

• Measure the final temperature

• Measure the temperature of both beakers

• Heat or cool both beakers to the correct temperature

• Measure 100 mL of water in one beaker and 200 mL of water in another beaker

• Mix both beakers together into the third beaker

Answer explanation

Hot Water

Cold Water

Electric hot plate

Temperature Probe

3 beakers (containers)

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

NGSS.MS-PS3-5

Click on the particles of hot water

Answer explanation

Moving fast with large arrows

Tags

NGSS.MS-PS3-3

NGSS.MS-PS3-4

NGSS.MS-PS3-5

Draw a picture of the particles in cold water

Answer explanation

Moving slow with small arrows

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-4

Which picture shows thermal equilibrium?

Tags

NGSS.MS-PS1-4

Explain on a MICROSCOPIC scale, how heat transfers when we combine hot and cold water.

Answer explanation

The average kinetic energy (temperature) of hot water is higher than the average kinetic energy of cold water. When the two samples are mixed, the particles of the hot water begin to collide with the particles of the cold water. After some collisions and some time, eventually the average kinetic energy of the cold and hot water mixed will be the same. The thermal energy of the hot water is higher, so it will transfer some heat energy to the cold water, eventually reaching thermal equilibrium.

Tags

NGSS.MS-PS1-4

Click on the colder water sample.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

If we mix both water samples, draw the new graph.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

NGSS.MS-PS3-5

What happens to a liquid on the micro and macroscopic scale when it is heated?

Answer explanation

Macroscopic: Water may start to boil. Bubbles may start to form.

Microscopic: The particles are given more kinetic energy, meaning they begin to move faster. Faster moving particles means more thermal energy as well as a higher temperature.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4