NEW
Font size
Worksheets6.2 Thermal Energy Lessons 1-6
Total questions: 30
Worksheet time: 1hrs 14mins
How does a hot cup system cool down?
heat energy is transferring out of the cup and into the cool air
cold energy is transferring from the air into the cup
heat is transfering out of the cup AND cold is transferring into the cup
The cup will never cool down.
When a system is warming up, energy is
transferring into it
transferring out of it
Why does water get colder when you add ice?
Heat transfers out of the water into the ice.
Cold transfers out of the ice into the water.
Anything that has mass and takes up space
weight
matter
energy
system
Which option gives the best explanation of how a cup of cold water will get to room temperature?
The cold liquid particles in the cup evaporate and this cools it to room temperature as it condenses on the side of the cup. As liquid particles escape the mass of the liquid decreases and causes the regular cup to heat up more than the fancy cup.
The room temp gas particles on the outside of the cup collide with the solid wall. The energy is then transferred from the solid wall to the cooler liquid particles inside. As the liquid particles gain energy they also increase in temperature. These collisions between the gas particles, solid wall, and liquid particles allow the regular cup to heat up more.
The liquid particles in the cup gain energy through collisions with other liquid particles. As they gain energy they increase in temperature of the liquid.
We tested two cup systems to determine the effectiveness of having a lid (one cup with a lid and one without). Which system did better at keeping the temperature the same and why?
Both cup systems had the same results. A lid has no effect on maintaining the temperature inside a cup
The open cup system did better at maintaining the temperature because it equalized the air temperature surrounding the cup.
The closed cup system did better at maintaining the temperature because it prevented hot air from escaping.
Sarah was visiting her friend, Regina. They were in Regina’s backyard, enjoying some ice-cold lemonade. They noticed that there were droplets on the outside of the pitcher of lemonade. The 2 friends made the following claims: Sarah said, “Those droplets must be lemonade leaking from inside the pitcher.” Regina said, “The droplets on the outside of the pitcher are water. They came from the air outside the pitcher. Who is correct?
Sarah because lemonade is liquid and air is gas.
Sarah because friends are always right.
Regina because evaporation happens on the outside of the pitcher.
Regina because condensation droplets form from the air around/outside a container.
The condensation that forms on the outside of a cold glass of water comes from _____.
the ice inside the cup
the water vapor in air
the plastic breaking down
Refer to the diagrams below. If red arrows represent "warm" energy and blue arrows represent "cool" energy, which diagram BEST explains the heat transfer between the koala and the tree on a hot day? Why? (Note: the koala is warmer than the tree).
IMAGE A. because on a hot day the tree trunk is warmer than the koala's body and koalas want to warm up.
IMAGE B. because on a hot day the tree trunk is cooler than the koala and heat leaves the koala's body and is transferred to the cool tree cooling the koala down.
IMAGE C. because on a hot day the tree trunk is cooler than the koala and the coolness is transferred to the koala's body.
IMAGE D. because on a hot day the tree trunk is cooler than the koala and as heat transfers from the koala to the tree, the coolness from the tree transfers to the koala.
Which best describes a liquid?
a state of matter that has no definite shape but has a definite volume and moves by sliding past each other
a state of matter that has definite shape and volume and vibrates in place
a state of matter that has no definite shape or volume and moves freely
all of the above
Which best describes a solid?
a state of matter that has no definite shape but has a definite volume and moves by sliding past each other
a state of matter that has definite shape and volume and vibrates in place
a state of matter that has no definite shape or volume and moves freely
all of the above
Which best describes a gas?
a state of matter that has no definite shape but has a definite volume and moves by sliding past each other
a state of matter that has definite shape and volume and vibrates in place
a state of matter that has no definite shape or volume and moves freely
all of the above
Recently, we did a cold water test whee we tested the mass initially and then after 10 minutes. What evidence helped proved the water did not come from inside the cup?
The system was a closed system.
The mass of the cup system decreased.
The mass of the cup system increased.
The mass of the cup system kept changing.
Why can't liquids move through solids?
They don't contain enough food coloring.
Solids have densely packed particles that move very little.
They liquids must be hot enough to fit through the spaces between the particles of the solid.
Liquids are not very smart and do not know how to open lids so the system stays a closed system.
What is condensation?
Condensation is matter that passes through a solid.
Condensation is when a gas cools into a liquid.
Condensation is the same as evaporation.
Condensation is a combination of solids, liquids, and gases.
Which one of these cups is a closed system (no matter can get in or out)?
Which one of these containers represents an OPEN system (matter can get in and out)?
What does the blue particle that's up high in the circle represent?
The blue circle up high represents a water molecule that has evaporated.
The blue circle up high represents a molecule of air that is not water.
The blue circle up high represents a water molecule that has turned to ice.
When you leave your cold drink outside, the glass may have water drops on it the outside of the glass. This is an example of...
Which model is demonstrating what molecules in a solid look like.
Which model is demonstrating what molecules in a liquid look like.
Which model is demonstrating what molecules in a gas look like.
Water at 34º C was placed into containers made of four different materials. An initial temperature was taken, and a final temperature was taken after 10 minutes. Which container allowed the BIGGEST transfer of thermal energy from the water to the environment?
glass
wood
paper
plastic
Four containers made of different materials, each containing water at 45º C, were set out on a table. The initial temperature of the water was recorded. The temperature of the water was also recorded 15 minutes later. Which container transferred the LEAST amount of energy?
Container A
Container B
Container C
Container D
Energy is __ when higher-energy particles come into contact with lower-energy particles.
transferred
lost
missing
qualitative
If we are doing an experiment to see how much a warming light shining on a cup will affect how fast the cup warms up what is the INDEPENDENT VARIABLE?
temperature change of the water
amount of light
amount of water in the cup
material of the cup
If we are doing an experiment to see how the amount of light shining on a cup affects how fast the water warms up, what would be the DEPENDENT VARIABLE?
amount of light
amount of water in the cup
temperature change of the water
material of the bottle
If we are trying to see how the amount of light shining a cup will affect how much a cup of water warms up, what is a CONTROLLED VARIABLE? Read carefully.
material of cup
amount of water in cup
number of layers in the cup
All answers are correct.
What is is called when gas molecules turn into a liquid?
condensation
evaporation
melting
freezing
What is it called when molecules turn from a liquid into a gas?
condensation
evaporation
melting
sublimation
