Grade+5+-+Review+sheet+for+Test+on+Light

Review Sheet – ANSWERS

1. Scientists know that visible light travels in ** A straight line **

2. When a ray of light reaches an object, it can ** BOUNCE ** off, ** PASS THROUGH ** the object or can be ** ABSORBED **.

3. __** TRANSPARENT **__objects let light pass through them easily.

4. _** OPAQUE **__ objects do not allow light to pass through them.

5. ___** TRANSLUCENT **_ objects let light pass through them but the light rays are then scatter so you cannot see a clear image.

6. The ability of a light ray to bounce off a surface is called __** REFLECTION **__.

7. The angle at which the light waves strike a surface determines the angle at which the light is ** REFLECTED **

8. When light falls on rough surfaces, the light rays are ** ABSORBED **

9. When light rays are scattered, ** BLURRY ** images are created.

10.In a mirror, light reflects off you and onto the mirror. Some of that light is ** REFLECTED ** back to your eyes.

11.The image in a mirror is the ** REVERSE ** of what your are looking at.

12.A flat mirror is called a __** PLANE __** mirror.

13.A __** CONCAVE **__ mirror is not flat; it curves **//inward//** like a spoon.

14. If a mirror is curved **//outward//**, like the back of a spoon, it is a __** CONVEX __**mirror.

15.A convex mirror makes light rays __** DIVERGE **__(spread out)

16.A concave mirror makes light rays ___** CONVERGE **__ (come together)

17.Concave mirrors are found in ** HEADLIGHTS **; ** SPOTLIGHTS **; and ** TELESCOPES **

18.__** TELESCOPES **__ use mirrors to capture images of objects in space.

19.The ____** HUBBLE **__ telescope has a mirror that is 240cm in diameter.

20.A ___** LENS **__ is a transparent object that has at least one curved side.

21.Lenses can __** MAGNIFY **__ or ** REDUCE ** the size of images.

22. Lenses, like mirrors, can be ____** CONCAVE **_____ or ____** CONVEX **____.

23.Light ___** REFRACTS **___ when it passes through either kind of lens mentioned in the question above.

24.Convex lenses are curved outward on one side and the middle is __** THICKER **_ than the edges.

25. Concave lenses are curved inward on one side and the middle is __** THINNER **__ than the edges.

26.___** REFRACTION **__ is the bending of a light wave as it enters different medium.

27.The color you see when you look at an object depends on the color of light being __** REFLECTED **___

28.State at least 3 uses of a Convex lens.


 * ** Far-sighted glasses **
 * ** Microscopes **
 * ** Magnifying glasses **