Skip to content Skip to navigation Skip to collection information

OpenStax-CNX

You are here: Home » Content » Natural Sciences Grade 4 » Natural Science module 2

Navigation

Lenses

What is a lens?

Definition of a lens

Lenses

A lens is a custom view of the content in the repository. You can think of it as a fancy kind of list that will let you see content through the eyes of organizations and people you trust.

What is in a lens?

Lens makers point to materials (modules and collections), creating a guide that includes their own comments and descriptive tags about the content.

Who can create a lens?

Any individual member, a community, or a respected organization.

What are tags? tag icon

Tags are descriptors added by lens makers to help label content, attaching a vocabulary that is meaningful in the context of the lens.

This content is ...

In these lenses

  • GETIntPhaseNS display tagshide tags

    This module and collection are included inLens: Siyavula: Natural Sciences (Gr. 4-6)
    By: Siyavula

    Module Review Status: Approved
    Collection Review Status: Approved

    Click the "GETIntPhaseNS" link to see all content selected in this lens.

    Click the tag icon tag icon to display tags associated with this content.

Recently Viewed

This feature requires Javascript to be enabled.

Tags

(What is a tag?)

These tags come from the endorsement, affiliation, and other lenses that include this content.
 

Natural Science module 2

Module by: Siyavula Uploaders. E-mail the author

NATURAL SCIENCES

Grade 4

Life and way of living

Module 2

Learn more about the sense of light

Activity:

To learn more about the sense of light [LO 2.1]

Some wise person has said that the eyes are the windows to the soul of the person, because you are able to see what kind of person you meet when you look into someone’s eyes.

Sight is one of the most important senses, because it gives you an idea of what is happening around you. Your eye needs light to be able to see. Light is reflected from everything around you and enters the eye through the little black hole in the centre of your eye, the pupil. The light may be from the sun or from an electric light bulb. If the light is not bright, the pupils enlarge slightly to allow more light to enter, but when it is bright, they contract. The image is taken via a nerve as a message to the brain.

Complete the illustration of the eye by neatly printing the captions on the lines.

Figure 1
Figure 1 (graphics1.png)

Have a group discussion on the following:

Why do some people wear glasses?

How should we behave towards children in the class who wear glasses?

Cover one eye. Now discuss the usefulness of having two eyes.

Try to catch a ball when one eye is shut.

There are many blind people. Keep your eyes shut tightly for a few minutes. Concentrate on how you feel. How should we behave towards blind people?

Assessment

LEARNING OUTCOME 2: CONSTRUCTING SCIENCE KNOWLEDGEThe learner will know and be able to interpret and apply scientific, technological and environmental knowledge.

ASSESSMENT STANDARD 2.1: The learner is able to recall significant information.

Memorandum

Captions for illustration of the eye:

  1. eyelid
  2. eyeball
  3. pupil

4. eyelashes

Collection Navigation

Content actions

Download:

Collection as:

PDF | EPUB (?)

What is an EPUB file?

EPUB is an electronic book format that can be read on a variety of mobile devices.

Downloading to a reading device

For detailed instructions on how to download this content's EPUB to your specific device, click the "(?)" link.

| More downloads ...

Module as:

PDF | More downloads ...

Add:

Collection to:

My Favorites (?)

'My Favorites' is a special kind of lens which you can use to bookmark modules and collections. 'My Favorites' can only be seen by you, and collections saved in 'My Favorites' can remember the last module you were on. You need an account to use 'My Favorites'.

| A lens I own (?)

Definition of a lens

Lenses

A lens is a custom view of the content in the repository. You can think of it as a fancy kind of list that will let you see content through the eyes of organizations and people you trust.

What is in a lens?

Lens makers point to materials (modules and collections), creating a guide that includes their own comments and descriptive tags about the content.

Who can create a lens?

Any individual member, a community, or a respected organization.

What are tags? tag icon

Tags are descriptors added by lens makers to help label content, attaching a vocabulary that is meaningful in the context of the lens.

| External bookmarks

Module to:

My Favorites (?)

'My Favorites' is a special kind of lens which you can use to bookmark modules and collections. 'My Favorites' can only be seen by you, and collections saved in 'My Favorites' can remember the last module you were on. You need an account to use 'My Favorites'.

| A lens I own (?)

Definition of a lens

Lenses

A lens is a custom view of the content in the repository. You can think of it as a fancy kind of list that will let you see content through the eyes of organizations and people you trust.

What is in a lens?

Lens makers point to materials (modules and collections), creating a guide that includes their own comments and descriptive tags about the content.

Who can create a lens?

Any individual member, a community, or a respected organization.

What are tags? tag icon

Tags are descriptors added by lens makers to help label content, attaching a vocabulary that is meaningful in the context of the lens.

| External bookmarks