BM

Common table salt, NaCl, is used to season and preserve food. What is table salt?

• compound

• element

• solution

• mixture

Tags

NGSS.MS-PS1-1

A small beaker contains 300 mL of water at 20°C. A large beaker contains 300 mL of water at 60°C. A student places the small beaker in the large beaker and allows this setup to stand undisturbed for a few hours. The temperature of the water in each beaker is then measured.

Assuming that the temperature of the room where the beakers are has no effect on the movement of the energy between the fluids in the beakers, which of the following demonstrates the way thermal energy moves in this experiment?

• Water in the small beaker is 40°C, while water in the large beaker is also 40°C.

• Water in the small beaker is 20°C, while water in the large beaker is 60°C.

• Water in the small beaker is 10°C, while water in the large beaker is 70°C.

• Water in the small beaker is 0°C, while water in the large beaker is 80°C.

Tags

NGSS.MS-PS3-4

NGSS.MS-PS1-4

A glass jar holds 100 mL of water at 75°C (167°F). A metal spoon at 23°C (73°F) is placed into the water. What will most likely happen after they are in contact for five minutes?

• The temperature of the spoon will decrease as thermal energy flows into the water.

• The temperature of the water will decrease as thermal energy flows into the spoon.

• The temperature of the water and spoon will remain the same as no thermal energy is transferred.

• The temperature of the water and spoon will both increase as thermal energy transfers between them.

Tags

NGSS.MS-PS3-4

NGSS.MS-PS1-4

Which of the following best describes a situation that would result in convection?

• Putting a metal spoon in a mug of hot water

• Leaving a glass of ice in the sun

• Turning on an air conditioner in a hot room

• Turning on an electrical current

Tags

NGSS.MS-PS3-3

NGSS.MS-ESS2-6

A student was given the volume and description of a substance and was asked to determine its density. What information is missing?

• size

• mass

• boiling point

• melting point

What is a common advantage of nuclear, wind, hydroelectricity, and solar energy?

• All four energy sources produce no carbon dioxide.

• All four energy sources are renewable.

• All four energy sources require limited facilities to produce electricity.

• All four energy sources are reliable, having no fluctuations in production.

When the Sun heats one region in an ocean, the movement of the water in the ocean circulates the heat. What is this called?

• Radiation

• Conduction

• Convection

• Absorption

Tags

NGSS.MS-ESS2-4

Which of the following is an advantage of using wind turbines to generate energy for a city?

• Wind turbines are quiet and improve scenic areas.

• Wind turbines are suitable for any location in the country.

• Wind turbines require little space and produce continuous power.

• Wind turbines do not emit carbon dioxide and do not require sunshine.

Tags

NGSS.MS-ETS1-2

When it is cold outside, wearing a coat prevents —

• conduction, the transfer of heat from a person's body to the atoms in the air.

• convection, the transfer of heat through empty space.

• radiation, the transfer of heat to fluids, such as water vapor in the air.

• radiation, the transfer of heat in circular a pattern from the person's body to the air.

When ice is put in lemonade, the temperature of the lemonade decreases because —

• heat transfers from the ice to the lemonade through conduction.

• cold transfers from the ice to the lemonade through convection.

• heat transfers from the lemonade to the ice through conduction.

• cold transfers from the lemonade to the ice through convection.

Tags

NGSS.MS-PS3-4

NGSS.MS-PS1-4

NGSS.MS-PS3-5