Question

a.
A lamp is a luminous object.
We can see a non-luminous object because it gives out light.
d. Water is transparent.
e. The length of a shadow remains the same throughout the day.
3. Choose the correct answer.
The main source of light on Earth:
(1) the moon (2) the sun (3) bulbs
(4) electricity
b. Objects that allow light to pass through them:
(1) opaque
(2) transparent (3) luminous
(4) wood
c. A shadow is formed when this object comes in the way of light:
(1) glass
(2) wood
(3) water
(4) clear plastic
d. The time of day when shadows are longer:
(1) morning
(2) noon
(3) midnight (4) afternoon
e. Cars honking is this kind of sound:
(2) pleasant (3) unpleasant (4) none of these
4. Answer the following questions in one or two sentences.
(1) soft​

Answer 1

Answer:

the anser is unplesent

Answer 2

Required Answer:

True or false:

a) A lamp is a luminous object.

→ True

_____________

b) We can see a non-luminous object because it gives out light.

→ False

Correct statement:We can't see a non-luminous object because it doesn't give out light.

_____________

d. Water is transparent.

→ True

_____________

e. The length of a shadow remains the same throughout the day.

→ False

Correct statement:The length of a shadow changes throughout the day.

_______________________________

Choose the correct option:

a. The main source of light on Earth:

• Sun

→ Sun is the main source of light as without light of the sun humans can't live.

___________________

b. Objects that allow light to pass through them:

• Transparent

→ Transparent object allows light to pass it completely.

Translucent object allows light to pass it partially.

Opaque object doesn't allow the light to pass.

__________________

c. A shadow is formed when this object comes in the way of light:

• Wood

→Three things are needed to form a shadow—

• An object
• Opaque object
• Light

Since wood is the only option which is an Opaque object, so it it the correct option.

__________________

d. The time of day when shadows are longer:

• Morning

___________________

e. Cars honking is this kind of sound:

• Unpleasant

→ Pleasant sounds are those that are smooth and agreeable to the ear. Whereas, unpleasant sounds are jarring, disagreeable to the ear.

Thus, car honking is the kind of unpleasant sound.

________________________________