Why would you mount an overhead transparency in a cardboard frame?

A. to make copies of it
B. To color it
C. To add overlays
D. To project it onto a screen

D.

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The correct answer is D. To project it onto a screen.

When you mount an overhead transparency in a cardboard frame, it allows you to project the transparency onto a screen using an overhead projector. This setup is commonly used in classrooms and presentations to display content to a larger audience.

To mount an overhead transparency in a cardboard frame, follow these steps:

1. Start by preparing the transparency: Ensure that it is clean and free from any smudges or marks that may affect the projected image quality.

2. Cut a piece of cardboard: Take a piece of sturdy cardboard and cut it to the same size as the transparency. It should create a border around the transparency when inserted into the frame.

3. Attach the transparency to the cardboard: Use transparent tape or adhesive to secure the transparency onto the cardboard frame. Make sure it is aligned properly and lays flat without wrinkles or air bubbles.

4. Reinforce the frame (optional): Depending on the size and weight of the transparency, you may want to reinforce the cardboard frame by attaching additional strips or layers of cardboard to the back. This will provide extra support and prevent the frame from bending or warping during projection.

5. Insert the mounted transparency into the projector: Open the overhead projector and carefully place the mounted transparency onto the glass plate or platform. Make sure it is centered and positioned correctly to ensure a clear and focused projection onto the screen.

6. Project the transparency onto a screen: Switch on the overhead projector and adjust the focus and brightness settings as needed. The transparency image will be projected onto a screen or wall, allowing your audience to view the content.

Remember, mounting an overhead transparency in a cardboard frame is specifically done to project the transparency onto a screen. This method is particularly useful when you want to share information or visuals with a larger group of people.