Science Principles Quiz

What would happen if you put a cup of hot chocolate outside in the cold?

• The cold from the air moved to the hot chocolate.

• The heat from the hot chocolate moved to the cold outside air.

Answer explanation

The correct choice is that the heat from the hot chocolate moved to the cold outside air. Heat naturally flows from warmer objects to cooler ones, causing the hot chocolate to cool down.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-3

If you hold an ice cube in your hand, it begins to melt and makes your hand feel cold. What is the scientific reason for this?

• Hot objects cool down quickly.

• Cool objects warm up quickly.

• Heat moves from hot objects to cold objects.

• Heat moves from cold objects to hot objects.

Answer explanation

When you hold an ice cube, heat from your hand transfers to the ice (a cold object), causing it to melt. This heat transfer makes your hand feel cold, as heat moves from hot objects (your hand) to cold objects (the ice).

Tags

NGSS.MS-PS3-3

NGSS.MS-PS3-4

Why will cold food get warm and go bad if you leave the refrigerator door open?

• The refrigerator does not work if the door is open.

• The warm air in the room moves inside the cool refrigerator.

• The light inside the refrigerator comes on and warms the food.

• The cool air in the refrigerator goes out of the door and into the room.

Answer explanation

Leaving the refrigerator door open allows warm air from the room to enter, raising the temperature inside. This can cause cold food to warm up and spoil, making the correct choice: 'The warm air in the room moves inside the cool refrigerator.'

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-5

When warming soup on a hot stove, why should you use a wooden spoon or a spoon with a plastic covering for the handle?

• to allow heat from the hand to cool the soup

• to keep heat from the hand from cooling the soup

• to allow the handle to transfer heat to a person's hand

• to keep the handle from transferring heat to a person's hand

Answer explanation

Using a wooden or plastic-handled spoon prevents heat from the hot soup from transferring to your hand, keeping it safe and comfortable while stirring.

Tags

NGSS.MS-PS3-3

Mrs. Anderson puts four spoons in a cup of hot water. Each spoon is made of a different material. The materials are metal, glass, plastic, and wood. If she measures the temperature of each handle, which spoon handle will conduct the mot heat and have the highest temperature?

• the metal spoon

• the glass spoon

• the plastic spoon

• the wooden spoon

Answer explanation

The metal spoon will conduct the most heat due to its high thermal conductivity, resulting in the highest temperature at the handle compared to the glass, plastic, and wooden spoons.

Tags

NGSS.MS-PS3-3

How are the Sun, a fire, and a light bulb alike?

• They are all very large.

• They all use electricity.

• They are all in outer space.

• They all give off heat and light.

Answer explanation

The Sun, fire, and a light bulb all produce heat and light. While they differ in size and energy source, their common function of emitting heat and light makes this the correct choice.

We have learned about objects that give off light energy. What other type of energy do these objects most likely give off?

• heat energy

• sound energy

• motion energy

• electrical energy

Answer explanation

Objects that give off light energy, like light bulbs, also produce heat energy due to the conversion of electrical energy into light. This heat is a byproduct of the energy transformation process.

If you rub your bare feet back and forth quickly on the carpet, what will happen to the temperature of the carpet?

• get warmer

• get cooler

• get softer

• get drier

Answer explanation

Rubbing your feet on the carpet generates friction, which produces heat. This heat transfer causes the temperature of the carpet to increase, making it warmer.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

NGSS.MS-PS3-5

What would you observe about a piece of wood after you rubbed it quickly with sandpaper?

• It is cool because air cools wood.

• It is warm because the light heated the wood.

• It is cool because your hand is warmer than the wood.

• It is warm because the rubbing motion heated the wood.

Answer explanation

Rubbing the wood with sandpaper generates friction, which produces heat. This heat warms the wood, making it feel warm to the touch. Therefore, the correct observation is that it is warm because the rubbing motion heated the wood.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

NGSS.MS-PS3-5

What type of energy powers the TV that is plugged into a wall?

• electrical

• light

• motion

• sound

Answer explanation

The TV that is plugged into a wall is powered by electrical energy. This energy is supplied through the electrical outlet, allowing the TV to function and display images.