Worksheet Solutions: Shadows | Know Your Aptitude Class 3 To 5 - Class 5 PDF Download

Section A: Multiple Choice Questions (MCQs)

Q1: Shadows are formed when:
(a) Light is blocked by an object
(b) Objects are transparent
(c) Objects are made of metal
(d) There is no sunlight

Ans: (a)
Explanation: Shadows are formed when an object blocks the path of light. The light cannot pass through the object, creating a shadow on the opposite side.

Q2: The size of a shadow depends on:
(a) The distance between the object and the light source
(b) The color of the object
(c) The shape of the object
(d) The height of the object

Ans: (a)
Explanation: The size of a shadow depends on the distance between the object and the light source. When the object is closer to the light source, the shadow appears larger.

Q3: Which of the following objects will cast the largest shadow?
(a) A small ball
(b) A tall tree
(c) A flat book
(d) A round pencil

Ans: (b)
Explanation: The size of the shadow depends on the height of the object. A taller object will cast a larger shadow compared to a smaller object.

Q4: When the sun is low in the sky, shadows are:
(a) Shorter
(b) Longer
(c) The same length
(d) Nonexistent

Ans: (b)
Explanation: When the sun is low in the sky, the angle at which the sunlight reaches the object is lower. This causes the shadows to appear longer.

Q5: An opaque object is one that:
(a) Allows light to pass through
(b) Blocks light completely
(c) Reflects light
(d) Bends light

Ans: (b)
Explanation: An opaque object blocks light completely, preventing it from passing through and creating a shadow on the opposite side.

Section B: Short Questions

Q1: Explain how shadows are formed.

Ans: Shadows are formed when an object blocks the path of light. As light travels in straight lines, when an object comes in the path of light, it creates a shadow on the side opposite to the light source.

Q2: Why do shadows change their length throughout the day?

Ans: Shadows change their length throughout the day because the position of the sun changes. The angle at which sunlight falls on objects determines the length of their shadows. As the sun moves across the sky, the angle changes, resulting in varying shadow lengths.

Q3: Can a transparent object cast a shadow? Give a reason for your answer.

Ans: No, a transparent object cannot cast a shadow. Transparent objects allow light to pass through them without blocking it. Hence, no shadow is formed as the light passes through without obstruction.

Q4: How does the shape of an object affect the shape of its shadow?

Ans: The shape of an object affects the shape of its shadow. The edges of the object determine the outline of the shadow. If an object has curved edges, its shadow will also have a curved shape. Similarly, if an object has straight edges, its shadow will have straight edges.

Q5: What happens to the size of a shadow when the object is moved closer to the light source?

Ans: When the object is moved closer to the light source, the size of the shadow becomes larger. This is because the distance between the object and the light source decreases, resulting in a larger projection of the object's shape.

Section C: Long Question

Q1: Imagine you are standing in front of a wall. Draw a diagram showing the position of yourself, the wall, and your shadow when the sun is directly above you. Label the diagram and explain why the shadow appears directly below you.

Ans: When the sun is directly above, the light falls vertically on your body. As a result, your shadow appears directly below you. This happens because the sunlight casts your shadow in the opposite direction of the light source, which in this case is straight down.

Q2: Draw the object’s shadow.

Ans: