Eclipses and Moon Phases Activity a flashlight being used to make the shadow of an eclipse behind a globe
Student sample of a modeled eclipse.
This lesson highlighted eclipses and lunar phases. If you had to teach another person about the difference between the two events, how would you explain it?

Models are a great way to explain a process. For instance, if you used a flashlight as the sun and made a model of Earth and the moon, you could show how an eclipse forms as shown in the student sample.

Choose either eclipses or lunar phases and make a model of the event. Your model can take any form, providing it can explain how your event takes place. Once you have created your model, use it to teach someone else about lunar phases or eclipses. Submit a picture, video, or diagram of your model to your instructor, along with evidence of how you used your model to explain your selected event.

Activity Checklist
Include a picture, video, or diagram of your model of lunar phases or eclipses.
Provide a description of how you made your model and how it demonstrates eclipses or lunar phases.
Include a one-paragraph reflection on the success of your model in explaining your event.
Include the name of the person you taught about your event and that person's description of what they learned from your model.
Be sure to review the grading rubric before you begin.

i am going to put the answers in order i dint feel like typing it out so yeah

a

d

c

b

b

b

a

d

a

b

c

c

c

b

d

answer: c. the experiment shows that the red substance experienced a chemical change.

explanation: chemical change is the change in which chemical composition of the substance changes. physical change is the change in which there is no change in chemical composition.

chemical changes are accompanied by following changes:

a) precipitate formation

b) energy is released or absorbed

c) formation of bubbles

d) change in color

as it is given that the red color has disappeared and there is production of gas, it means the red substance has undergone a chemical change.

e

you need to take a look at the periodic system in order to sort these elements into pairs that would most likely exhibit similar chemical properties. first, you need to find elements that are found in the same group (groups are vertical in the periodic system), and then to see whether they have the same valence number. if they meet these criteria, they will have similar properties.

the first pair: ne (neon) and kr (krypton), are noble gases found in group 8

the second pair: li (lithium) and k (potassium), found in group 1

the third pair: s (sulfur) and te (tellurium), found in group 6

one negative thing it that it can kill water animals. another negative thing is it can cause the destruction of ecosystem. one way water pollution can be reduced is to conserve energy.