Science Cycle 2

Amir’s mom brought a pitcher of cold lemonade outside. After a few minutes, drops began to form on the outside of the pitcher. Which process does the water on the outside of the pitcher demonstrate?

• boiling

• condensation

• evaporation

• freezing

Water can change forms from solid to liquid to gas. When water changes from liquid to gas, what is this called?

• condensation

• evaporation

• freezing

• melting

Nima walks outside one morning and notices that her mother’s car is covered with ice. What change has water gone through to become ice?

• boiling

• evaporation

• freezing

• melting

Gino builds a snow person. As the sun comes out, he notices the snow person begins to get smaller and a puddle of water forming on the ground under the snow person. What type of change is taking place?

• liquid freezing to become solid

• liquid melting to become gas

• solid freezing to become liquid

• solid melting to become liquid

Kim placed a pot of water on a stove for 15 minutes. She observed that the water began to bubble and that the water level dropped. Which explanation below describes what is happening to the water?

• The water is freezing.

• The water is cooling.

• The water is melting and is disappearing.

• The water is boiling and is evaporating.

Jacob had an empty beaker. He quickly put a balloon over the top of the beaker and placed the beaker in a container of hot water. Jacob illustrated his results above.

Which was shown by the investigation?

• Heating the gas inside the beaker inflated the balloon.

• Heating the gas inside the beaker added water to the balloon.

• Heating the gas inside the beaker made the balloon shrink.

• Heating the gas inside the beaker causes no change to the balloon.

Nolan picks up a book from his desk and hands it to his teacher. His teacher sets the book down and slides it across a table. Which action produces the most heat?

• sliding the book across a table

• handing the book to his teacher

• setting the book down on the table

• picking the book up from his desk

When your hands feel cold, it can help to rub them together very quickly. This can make your hands feel warm. Why does rubbing your hands together make them warm?

• Rubbing your hands together can cause a fire that produces heat.

• Moving your body can cause your heart rate to speed up and warms the blood.

• Rubbing your hands together causes friction which can produce heat.

• Rubbing your hands together causes energy which produces heat.

A light bulb in the table lamp goes out. Carrie quickly replaces it and burns her fingers when removing the light bulb. Why does this happen?

• A light bulb reflects light, which causes her fingers to burn.

• A light bulb absorbs heat from the air.

• A light bulb produces light and also gives off heat.

• A light bulb still has electricity running through it which causes heat.

Several students in a class measured the temperature in different places around the school at 10:00 a.m. The results are shown in the table. What variable below BEST explains why the temperatures are different?

• Some of the thermometers did not work well.

• Temperature is difficult for students to measure.

• Some of the thermometers were placed in shaded areas and some in sunny areas.

• Temperature is often different if the thermometer is moved just a few feet away.