Why does food wrapped in aluminum foil keep warm for a long time?

The silver surface of the foil reflects heat in and prevents heat loss by radiation.

Aluminum foil is an insulator and prevents heat loss by conduction.

Aluminum foil forms an air-tight seal and prevents heat loss by convection.

The silver surface of the foil absorbs heat from the surroundings and keeps the food warm.

Amber likes riding her bicycle through her neighborhood where there are lots of hills. She rides down a very steep hill, and then goes up a small hill. She doesn't need to pedal as her bicycle carries her up the small hill. How does Amber's kinetic energy and potential energy change as she goes uphill?

Her kinetic energy decreases and her potential energy increases.

Her kinetic energy and her potential energy both increase.

Her kinetic energy and her potential energy both decrease.

Her kinetic energy increases and her potential energy decreases.

For part of a project, Antonio is creating a poster to describe different ways energy is used in his home. Before he creates the poster, he makes several observations of energy being used and writes them in his notebook. Which of the following actions in Antonio's list describes potential energy being converted to kinetic energy?

A battery is used to operate a remote control car.

An electric blanket is used to keep warm.

A microwave oven is used to reheat leftovers.

A lamp is turned on and used to read the paper.

Sasha drops some of her ice cream sundae on a hot sidewalk. Which of the following correctly describes what happens next?

Heat from the sidewalk is transferred to the ice cream, increasing the temperature of the ice cream.

The temperature of the sidewalk and the ice cream both remain unchanged.

The temperature of the ice cream increases as it sends cold into the sidewalk.

Cold from the ice cream is transferred to the sidewalk, decreasing the temperature of the sidewalk.

Erin places some ice cubes into freshly made tea that is still quite warm. Which of the following correctly describes what happens to the ice cubes?

Some of the heat from the tea is transferred to the ice cubes and causes them to melt.

The temperature of the ice cubes remains the same as the temperature of the tea drops.

The cold from the ice cubes is transferred into the tea and causes the cubes to warm up and melt.

Heat is transferred between the ice cubes and the tea, which causes the temperature of the tea to increase.

On a particularly cold winter day, Kurt takes a plate of hot food outside to eat lunch. His mother calls him back inside and he forgets the plate outside. Which of the following will happen next?

Heat from the food transfers to the surrounding air until the food reaches the same temperature as the air.

Cold from the air gets inside the food until the food is the same temperature as the air.

Cold from the air moves into the food until the temperature of the food drops below the temperature of the air.

Heat from the food increases the temperature of the surrounding air until the air is the same temperature as the food.

Georgia places a pot of cold water on a hot stove. She accidentally turns the stove off. What will most likely happen after about 30 minutes?

The temperature of the water will increase, and the temperature of the stove will decrease until they are both room temperature.

The temperature of the stove will decrease, but the temperature of the water will remain the same.

The temperature of the water will continue to increase until some of it is changed to a gas and evaporates into the surrounding air.

The temperature of a clay ball is 10ºF and the temperature of the water in a bucket is 30ºF. A student places the clay ball into the bucket of water. Which of the following describes how thermal energy is transferred between the ball and the water?

Thermal energy is transferred from the water to the ball until they are both at 25ºF.

Thermal energy is transferred from the ball to the water until they are both at 25ºF.

Thermal energy is transferred from the water to the ball until the ball is at 30ºF and the water is at 10ºF.

No thermal energy would be transferred between the ball and the water, so the ball will stay at 10ºF and the water will stay at 30ºF.

In order to make iced tea Lois brings a pitcher of water to a boil, adds tea and then ice to cool the tea. Which of the following best describes the direction of the flow of thermal energy?

The energy flows from the tea to the ice.

The energy flows from the ice to the tea.

The energy flows between the ice to the air equally.

The energy flows between the ice and the tea equally.

The table below shows the temperatures of several different objects made of the same material. Use the table to answer any questions that follow. What will happen if the ball is placed inside the box?

Thermal energy will flow from the box into the ball until they come to the same temperature at 25°C.

Thermal energy will flow from the ball into the box until they come to the same temperature at 50°C.

Thermal energy will flow from the ball into the box until the box decreases in temperature to 20°C.

Thermal energy will flow from the box into the ball until the ball increases in temperature to 30°C.

Lainey wanted to know how long it would take to convert ice into steam. She held the test tube with ice over open flame and recorded her observations in her lab journal. The image below shows what Lainey observed. Which statement below best explains Lainey’s observations?

Heat was added causing the water to move through the states of matter.

Water releases heat to the air causing the state of matter to change.

The rise in temperature caused the water to move through the states of matter.

Absorbing heat from the air allows the water to move through the states of matter.

As energy in the form of heat is added to an ice cube, it begins to melt. What causes melting?

The transfer of thermal energy to the ice cube causes it to melt.

The transfer of thermal energy away from the ice cube causes it to melt.

Heat causes the molecules in the ice cube to expand and forces them apart

Heat removes thermal energy from the ice cube and causes it to become liquid water

Heat Transfer and Temperature

Authored by Charles Martinez

Science

6th - 8th Grade

NGSS covered

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MULTIPLE CHOICE QUESTION

45 sec • 5 pts

What kind of heat transfer happens when the sun is heating your body?

Conduction

Radiation

Convection

Density

MULTIPLE CHOICE QUESTION

45 sec • 5 pts

What heat transfer happens when you burn your hand by touching a fire?

Radiation

Conduction

Convection

I don't know!!!!!!!!!!!

MULTIPLE CHOICE QUESTION

45 sec • 5 pts

Warm air rises and the cool air sinks demonstrates this type of heat transfer.

conduction

convection

radiation

Insolation

Tags

NGSS.MS-ESS2-5

NGSS.MS-ESS2-6

MULTIPLE CHOICE QUESTION

45 sec • 5 pts

Warm air is __________ dense than cold air and rises creating convection currents.

less

Tags

NGSS.MS-ESS2-5

NGSS.MS-ESS2-6

MULTIPLE CHOICE QUESTION

45 sec • 5 pts

A toaster toasting bread is an example of

condensation

conductio

convection

radiation

Tags

NGSS.MS-PS3-4

NGSS.MS-PS3-3

MULTIPLE CHOICE QUESTION

45 sec • 5 pts

The man goes to take the hot pot off the stove with his bare hands.

conduction

convection

radiation

Tags

NGSS.MS-PS1-4

MULTIPLE CHOICE QUESTION

1 min • 1 pt

What happens when ice cubes melt in a glass?

Heat travels from the ice to the warmer water.

No energy is transferred.

Heat is transferred from the warmer water to the ice cubes.

The water warms up due to the humidity

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

NGSS.MS-PS3-5

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Heat Transfer and Temperature

What kind of heat transfer happens when the sun is heating your body?

What heat transfer happens when you burn your hand by touching a fire?

Warm air rises and the cool air sinks demonstrates this type of heat transfer.

Warm air is __________ dense than cold air and rises creating convection currents.

A toaster toasting bread is an example of

The man goes to take the hot pot off the stove with his bare hands.

What happens when ice cubes melt in a glass?

The way the heat is moving from the hot coffee is called...

The baby chickens are kept warm from the heat lamps demonstrates this type of heat transfer.

Conduction occurs in...

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