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Design a Garden Pod Viewer worksheet preview

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Design a Garden Pod Viewer

Compare school-garden viewing designs and model how light reflects from a seed pod and enters an observer's eye.

Grade 4ScienceInteractive · Printable

Aligned to4-PS4-2

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What’s included

  • Single worksheet
  • Auto-graded online
  • 1 NGSS standard
  • Printable answer key
  • 14 questions
  • Classroom-ready

Details

Format
Interactive · Printable
Grade
Grade 4
Subject
Science
Question types
Multiple choice, Matching, Circle the answer, Sorting, Short answer, Drawing

About this worksheet

What students practice

  • Students model how light travels from a source, reflects from an object, and enters the eye.
  • Students use observations to judge designs that block or preserve parts of a light path.
  • Students explain a viewing-design choice using evidence from tests.

How to use

Read the design test record together. Have students trace possible light paths with a finger before answering, then compare their final models and evidence.

Curriculum

NGSS standard covered

4-PS4-2

Model how light bounces off objects and enters the eye so that we can see them.

Preview

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Name Date

Design a Garden Pod Viewer

Use test results and light-path models to judge viewing designs.

1. Investigate the Viewer

Read the test record. Use the observations to answer the questions.

A Close Look at a Seed Pod

The school garden club is building a covered viewing box for visitors. A dry seed pod rests inside. Visitors look through a small eye opening to examine its ridges. The box walls and lid block outside light. A low-brightness LED flashlight shines through a different opening. The pod does not make its own light. No one looks straight into the flashlight.

Imani's team wants visitors to see the pod while keeping light from the flashlight from traveling straight into their eyes. The team compares four designs. They keep the same box, pod, flashlight brightness, and eye position. They change only the cap, screen, or shield described below. For each test, an observer reports whether the pod is visible.

First, the team turns the flashlight off. The observer cannot see the pod. In Design A, the flashlight is on and aimed at the pod. Nothing blocks the space between the pod and the eye opening. The observer can see the pod. In Design B, the flashlight is still on, but an opaque cap covers its light opening. Opaque means light cannot pass through. The observer cannot see the pod.

In Design C, the cap is removed. The flashlight shines on the pod, but an opaque screen stands between the pod and the eye opening. The observer cannot see the pod. In Design D, that screen is removed. A small shield blocks only the straight path from the flashlight to the observer's eye. It does not block the path from the flashlight to the pod or from the pod to the eye. The observer can see the pod.

1.
Compare Designs A and B. What does this comparison support?
  • A. The pod becomes a light source when the lid closes.
  • B. Light must be able to reach the pod for it to be seen.
  • C. Turning the flashlight on always makes the pod visible.
  • D. The observer's eye supplies enough light to see the pod.
2.
The pod receives flashlight light in both A and C. Why can the observer see it only in A?
  • A. The screen in C makes the flashlight turn off.
  • B. The screen in C stops the pod from making light.
  • C. The screen in C changes the observer's eye position.
  • D. The screen in C blocks light traveling from pod to eye.

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