Heat Transfer
On a cold winter day, Jasmine warms herself up by holding a warm cup of coffee. How is thermal energy transferred to Jasmine's hands?
Many restaurants serve drinks in Styrofoam cups. Why might a hot drink served in a Styrofoam cup stay hot longer than a hot drink served in a paper or plastic cup?
Styrofoam is a better insulator than paper or plastic.
What is matter? Give one example of something that is NOT matter.
Anything with weight that takes up space. Examples of things that aren't matter:
light, heat, thoughts, electricity, gravity, sound, time
Which of the following interactions results in the formation of a new
material?
A. slicing a pizza
B. mixing sand and water
C. chopping wood
D. baking a cake
D. Baking a cake
Macy decided to make orange juice for her family’s breakfast Saturday morning. She mixed 12 fluid ounces of orange juice mix with 36 fluid ounces of water in a pitcher. How much orange juice did Macy make?
48 fluid oz
A pot of stew is warming on the stove.
Which of the following is a result of convection?
A. Heat energy will transfer from the stove to the pot.
B. Heat energy will transfer to the pot and some of the stew.
C. Heat energy will transfer from the pot to the stove.
D. Heat energy will transfer throughout the entire pot of stew.
D. Heat energy will transfer throughout the entire pot of stew.
Why is wood used as a handle on a pot instead of copper?
Because wood is a poor conductor of thermal energy
Which state of matter does not have a fixed volume?
Gas
What type of change is food molding?
Chemical
Which of the following is an example of heat energy moving out of a material?
A. Liquid water changes to solid ice.
B. Liquid water changes to water vapor.
C. Snow changes to liquid water.
D. Ice cream left in a bowl changes to liquid.
A. Liquid water changes to solid ice
How does the sun's energy reach the Earth?
Explain why pans are made out of metals instead of plastic.
Metals conduct heat evenly, while plastic is an insulator.
Early one morning, Kayla notices drops of water on the outside of her bedroom window. Later in the day, she noticed that the drops have disappeared. What most likely caused the drops of water to disappear?
The water gained heat energy and evaporated
What is the new substance that is formed when metal sits in the sun after getting wet?
Rust
Suppose four small, warm plates are stacked on top of four large, cool plates. How will the thermal energy flow between the plates?
Thermal energy will flow from the 4 small plates to the 4 large plates.
Which step in the water cycle happens because water gains thermal energy?
Evaporation
Explain how insulated coats work
They keep your body heat trapped inside the coat and also slow the movement of heat.
Describe the how the molecules are arranged in a liquid. (describe the volume and shape)
Liquids have a fixed volume, but they take the shape of whatever container they are placed in.
True or false: Water can only become a gas when it is boiled.
False: Water can evaporate at any temperature
How does energy from the sun impact the water cycle?
A. The Sun’s energy traps water particles in clouds.
B. The Sun’s energy changes liquid water into water vapor.
C. The Sun’s energy causes water to precipitate.
D. The Sun’s energy creates winds in the atmosphere.
B. the Sun's energy changes liquid water into water vapor.
When does thermal energy stop moving between two objects?
When they are the same temperature
Name all conductors and insulators we have talked about in class.
Conductors: Metal, glass, ceramic
Insulators: Cloth, wood, plastic, rubber, styrofoam
Railroad tracks expand when they heat up. Explain how the mass of the tracks change when they expand.
The mass does not change
Name three ways that matter can be manipulated to make a physical change.
cutting, tearing, bending, breaking, ripping, mixing, cracking, smashing
What would happen to a glass container filled to the top with oil if it were placed in the freezer overnight?
Nothing. The oil would freeze, but not expand (unlike water)