Chapter 7 Earth and Its Resources, science, class 4, short Questions 11,12,13,14,15,16,17,18,19,20 PTBB, Pakistan 2023 SLO's Topics covered in questions

 Chapter 7

 Earth and Its Resources,

 science, class 4, 

Short Questions 11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,

27 

PTBB, Pakistan 2023  SLO's Topics covered in questions 

Question:11

From where do oceans get water?

Answer:

Oceans get water from Evaporation, Condensation, Rain, Glaciers, Snow falling etc.

Question:12

Dead animals decomposed, then where do their skeletons kept in the museum come from?

Answer:

Skeletons of dead animals displayed in museums usually come from a variety of sources. Many are from natural deaths, accidents, or hunting by  peoples. Some may come from zoos or research institutions where animals die due to natural causes. Others might be from historical collections.

Question:13

Do living organisms in the soil breathe?

Answer:

Yes, living organisms in the soil can breathe because soil has oxygen.

Question:14

What will happen if natural resources run?

Answer:

If natural resources run out, it could lead to environmental disturbance, resource scarcity, economic disruptions, and threaten the survival of life on Earth.

 

Question:15

Answer:

How much the land on Earth is cultivated?

11 Percent.

Question:16

How pencil and rubber are made?

Answer:

The pencil is made from wood and the rubber is obtained fro the secretion of a specific tree.

Question:17

When is the Word Soil Day is celebrated?

Answer:

5th December, every year

Question:18

Which natural resources are used to generate electricity?

Answer:

Sunlight, Air, Water, Natural oil

Question:19

In which country second salt mine is located?

Answer:

Khewra Mine (Pind Dadan Khan, Pakistan)

Question:20

Describe any two disadvantages and advantages of deforestation?

Answer:

Advantages:

1. We get more land. 

2. We can get wood by cutting trees.

Disadvantages:

1. Loss of biodiversity

2. Climate change

Question:21

Why are forests called renewable resources?

Answer:

Forests are called renewable resources because they can be replenished naturally through seed dispersal and regeneration, ensuring their sustainability over time.

Question:22

We found the skulls of various animals during an excavation. How do we know about their feed?

Answer:

 Triceratops are herbivores and eat different kinds of leaves of plants.

1. Triceratops are herbivores and eat different kinds of leaves of plants.

2. Spinosaurus are carnivores and eat fish primarily.

Question:23

Is there anything that is not made from natural resources?

Answer:

In a broad sense, everything in our world is ultimately derived from natural resources. Even synthetic or man-made products, materials, and technologies are created using elements and resources extracted from the Earth.

Question:24

Water is a natural resource and available for all human being on Earth because it is plenty but still not available for all?

Answer:

While water is indeed a natural resource and covers about 71% of the Earth's surface as oceans, not all of it is readily available for human use. The main reasons why water is not available for all human beings are:

1. Uneven distribution:
2. Water scarcity:
3. Pollution:
4. Inadequate infrastructure
5. Economic and political factors:

Question:25

Is it possible that we can have more resources than those of the past?

Answer:

Yes, it is possible to have more resources than in the past due to advancements in technology, exploration, and discovery of new resources.

Question:26

Can a fossil of jellyfish be preserved?

Answer:

Jellyfish do not have hard parts like bones or shells, which are more likely to fossilize but fossilization of jellyfish can occur in certain circumstances.

Chapter 7 Earth and Its Resources, science, class 4, short Questions 

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