Big Idea 10 & 11 review (AM Class)

Enrique made a cup of hot cocoa and placed it on his balcony on a chilly winter night. He decided to measure the temperature of the cocoa every five minutes using a thermometer. The table below shows the temperatures he recorded in degrees Celsius (°C). Time (minutes) | Temperature (°C) 0 | 35 5 | 29 10 | 23 15 | 17 Which statement best explains what happened to Enrique's hot cocoa?

• All of the heat from the hot cocoa moved to the thermometer.

• The cold from the balcony moved to the hot cocoa.

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

• The cold from the outside air moved to the hot cocoa.

During a science experiment at school, Sophia's teacher, Ms. Auti, demonstrated a scientific principle. She placed a plate that had been in the freezer on the table, and she had Sophia and Gianni touch the plate to show that it was cold. She then placed a cup of hot water on the plate and had Luthiavo touch the cup to show that it was hot. After five minutes, she removed the cup and let the students touch the cup and touch the area of the plate where the cup had been. Sophia, Gianni, and Luthiavo observed that the cup felt cooler and the plate felt warmer where the cup had been. Which of these statements best describes what Ms. Auti is demonstrating to the students?

• Heat moves from hot objects to cold objects.

• Cool objects warm up quickly.

• Hot objects cool down quickly.

• Heat moves from cold objects to hot objects.

Auti and Malik were having a sleepover at Sophia's house. Sophia's little brother, Gianni, left the refrigerator door open after getting a snack. Sophia told him to close it because the food inside would get too warm. This happens because (a)   .

• The refrigerator does not work if the door is open

• The warm air in the room moves inside the refrigerator

• The light inside the refrigerator causes the food to warm up

• The cool air in the refrigerator goes out when the door is open

On a hot summer day, Amiya and Sophia were playing in the park. Amiya touched the metal slide and quickly withdrew her hand because it was too hot. Why did the metal slide feel hot to Amiya's touch?

• The metal slide conducted heat to her hand.

• The metal slide transferred electricity to her hand.

• The metal slide reflected heat away from her hand.

• The metal slide reacted to form heat with her hand.

During a cooking class, Sophia noticed that Gianni always used a certain type of pot holder when handling hot pots and pans. The pot holder was made of fabric, but it had a silicone layer on the side that touched the pots. What is the most likely reason a fabric pot holder used for handling hot pots would have a silicone layer?

• To allow heat from the pot to warm Gianni's hand

• To keep heat from the pot from warming Gianni's hand

• To allow the pot holder to transfer heat to Gianni's hand

• To keep the pot holder from transferring heat to Gianni's hand

For their science project, Drake and Sophia are creating a display that illustrates examples of poor conductors of heat. They have collected a few items for their display. However, one item, (a)   , does NOT fit in their display as it is not a poor conductor of heat.

• plastic spoon

• glass jar

• iron rod

• ceramic plate

In a high school physics lab, Sophia, Gianni, Enrique, Luthiavo, and Emmanuel are conducting an experiment to understand the thermal conductivity of different materials. They decide to make a hot chocolate on a stove and insert four spoons into the hot chocolate. Each spoon is made of a different material: copper, glass, rubber, and wood. The students then measure the temperature of each spoon's handle using a thermal sensor. Which spoon's handle will show the highest temperature?

• the copper spoon

• the glass spoon

• the rubber spoon

• the wooden spoon

During a science experiment, Auti, Anayelen, and Enrique observed that the Sun, a campfire, and a light bulb in their classroom are alike in the way that they all (a)   .

• are all very large.

• all use electricity.

• are all in outer space.

• give off heat and light.

Gianni and Sophia are studying about objects like the sun that emit light energy. What additional type of energy do these objects likely emit?

• thermal/heat energy

• acoustic energy

• kinetic energy

• electric energy

During a cold winter day, Josefina and Anayelen were playing outside. To keep their hands warm, they started rubbing them together very quickly. What happens to the temperature of their hands?

• They get warmer

• They get cooler

• They get softer

• They get drier