why do molecules change speed? lesson pdf/thermal energy/te_2...• claim 2: molecules speed up when...
TRANSCRIPT
Students interpret various representations of molecular motion and label diagrams as hotter and colder. (10 min)
Why do molecules change speed?
Claim 1: Molecules speed up when energy is created and slow down when
energy is destroyed.
Claim 2: Molecules speed up when they get energy from other molecules and
slow down when they give energy to other molecules.
Relating Temperature, Speed, and Kinetic Energy
The following diagrams representing the molecules of
three pairs of samples.
• For each pair, label one sample as “hotter” and the
other as “colder” based on your interpretation of the
diagrams and your knowledge of how temperature,
speed, and kinetic energy are related.
• If you need to, you can refer to the key concepts
posted to the classroom wall.
• When you have finished labeling the images, answer
the questions.
Why do molecules change speed?
Students make an initial choice between the two claims and explore them in the Sim. (5 min)
Investigating Claims
Today you will investigate two claims about why molecules change
speed.
• First, look at the claims below and decide which one you think is
more likely to be correct.
• Then, open the Sim and begin exploring. Gather and record
evidence that will help you choose between the claims. You will
have more time to record evidence later in this lesson.
Students make an initial choice between the two claims and explore them in the Sim. (5 min)
Investigating Claims
Once you have chosen a claim, launch the Thermal Energy
Simulation and begin gathering evidence in the Sim.
ANSWER HERE
After the teacher models Active Reading, students read and annotate “How Air Conditioners Make Cities Hotter.” (20 min)
Reading “How Air Conditioners Make Cities Hotter”Open the “How Air Conditioners Make Cities Hotter” article. You can also find this article in your Digital
Resources. Annotate the article as you read.
Students reread a passage from the article “How Air Conditioners Make Cities Hotter” in order to gather evidence. (20 min)
Evidence for Why Molecules Change SpeedContinue to gather evidence about the two claims by rereading a portion of the article “How Air Conditioners
Make Cities Hotter.” Start at the fifth paragraph (which begins, “This kind of energy transfer doesn’t just apply to
hot buildings: it also applies to hot foreheads!”), and stop after the seventh paragraph (which ends, “When that
happens, it’s time to get a new, cool washcloth so that this energy transfer can keep going and you can keep
getting relief!”). Use the evidence you gathered from the text to complete the sentence below.
Investigation Question: Why do
molecules change speed?
Claim 1: Molecules speed up when
energy is created and slow down when
energy is destroyed.
Claim 2: Molecules speed up when they
get energy from other molecules and
slow down when they give energy to
other molecules.
Students reread a passage from the article “How Air Conditioners Make Cities Hotter” in order to gather evidence. (20 min)
Evidence for Why Molecules Change SpeedContinue to gather evidence about the two claims by rereading a portion of the article “How Air Conditioners
Make Cities Hotter.” Start at the fifth paragraph (which begins, “This kind of energy transfer doesn’t just apply to
hot buildings: it also applies to hot foreheads!”), and stop after the seventh paragraph (which ends, “When that
happens, it’s time to get a new, cool washcloth so that this energy transfer can keep going and you can keep
getting relief!”). Use the evidence you gathered from the text to complete the sentence below.
Investigation Question: Why do
molecules change speed?
Claim 1: Molecules speed up when
energy is created and slow down when
energy is destroyed.
Claim 2: Molecules speed up when they
get energy from other molecules and
slow down when they give energy to
other molecules.
ANSWER HERE
Students share annotations with their peers and receive a formal definition for the vocabulary term system. (15 min)
Reviewing Annotations1. Look over your annotations of the “How Air Conditioners Make Cities Hotter” article. Pick one or two
annotations to share with a partner. Then, edit the annotations and add #share.
2. Discuss the tagged annotations with your partner. After your discussion, edit these annotations and change
the tag to #discussed.
3. Now, choose one of the questions or connections you already discussed or a different question or
connection that you still want to discuss with the class. Edit the annotation and add #present.
4. Review your annotations, answer the reflection question below the article, and press NEXT and then HAND
IN to submit your article.
System: a set of interacting parts
forming a complex whole.
Students revisit the Sim in order to gather evidence that will help them choose between two claims. (10 min)
With a partner, continue to use the Sim to gather and record evidence about the claims.
Investigation Question:
• Claim 1: Molecules speed up when energy is created and slow down when energy is destroyed.
• Claim 2: Molecules speed up when they get energy from other molecules and slow down when
they give energy to other molecules.
Students revisit the Sim in order to gather evidence that will help them choose between two claims. (10 min)
: Molecules speed up when
energy is created and
slow down when
energy is destroyed.
: Molecules speed up when they
get energy from other
molecules and slow
down when they give
energy to other
molecules.
ANSWER HERE
Students use the evidence they collected to choose the claim that answers the Investigation Question. (10 min)
Choosing a ClaimThink back on the evidence that you collected from the Sim and the article. In the poll below, choose the claim
that you think is best supported by this evidence.
Investigation Question:
Why do molecules change speed?
• Claim 1: Molecules speed up when energy is created
and slow down when energy is destroyed.
• Claim 2: Molecules speed up when they get energy
from other molecules and slow down when they give
energy to other molecules.
Students use the evidence they collected to choose the claim that answers the Investigation Question. (10 min)
Choosing a ClaimThink back on the evidence that you collected from the Sim and the article. In the poll below, choose the claim
that you think is best supported by this evidence.
Collision: the moment when two objects hit
each other.
Transfer: to move from one object to
another or one place to another.
Students consider arguments written by two different students and evaluate which is more supported.
Making a Convincing Argument
ANSWER HERE