CBSE Class 4 Science Worksheet - Adaptations-How Plants Survive ... - Free Printable

Problem: Solve the worksheet questions on plant adaptations.

#### Worksheet Details
- School: The Indian Heights School
- Class: IV
- Subject: Science
- Chapter: Ch 8 - Adaptations: How Plants Survive
- Date: August 27, 2013

#### Questions and Answers

Q1. One word answers:

1. The plants that grow on land are known as
Answer: Terrestrial plants

2. The plants that grow in water are known as
Answer: Aquatic plants

3. The percent of the earth's surface covered with water is
Answer: 71%

4. The hollow stems of lotus are called
Answer: Aerenchyma

5. Several branches is a feature of trees in
Answer: Deciduous forests

6. Thorns on plants is a feature of trees in
Answer: Desert regions

7. Plants which have leaves almost all round the year are called
Answer: Evergreen plants

8. Places where the soil is very sticky and clayey are called
Answer: Marshes

9. Plants like pitcher plant that trap insects are known as
Answer: Carnivorous plants

10. The plants which do not contain chlorophyll and absorb food from other dead plants and animals are called
Answer: Saprophytes

11. Tape grass and pondweed are the examples of
Answer: Submerged aquatic plants

12. Plants whose stems are light and spongy in water are called
Answer: Floating aquatic plants

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Explanation of Solutions

1. Terrestrial plants: These are plants that grow on land and are adapted to survive in terrestrial environments. They have roots for anchoring and absorbing water and nutrients from the soil.

2. Aquatic plants: These are plants that grow in water or wet environments. They are adapted to live submerged or partially submerged in water.

3. 71%: Approximately 71% of the Earth's surface is covered by water, including oceans, seas, lakes, and rivers.

4. Aerenchyma: Lotus plants have hollow stems filled with air spaces (aerenchyma) to help them float and transport oxygen to their underwater parts.

5. Deciduous forests: Trees in deciduous forests have several branches and shed their leaves seasonally. This adaptation helps them conserve water during dry seasons.

6. Desert regions: Thorns on plants are an adaptation to reduce water loss and protect against herbivores in arid desert environments.

7. Evergreen plants: These plants retain their leaves throughout the year, allowing them to photosynthesize even in colder months.

8. Marshes: Marshes are wetlands with sticky, clayey soil and standing water. They support unique plant and animal life adapted to these conditions.

9. Carnivorous plants: Plants like the pitcher plant have evolved to trap and digest insects as a source of nutrients, especially in nutrient-poor soils.

10. Saprophytes: These plants lack chlorophyll and obtain nutrients by decomposing dead organic matter. Examples include fungi and some flowering plants like Indian pipe.

11. Submerged aquatic plants: Tape grass and pondweed are fully submerged in water and have adaptations such as thin, flexible stems and broad leaves to thrive underwater.

12. Floating aquatic plants: These plants have light, spongy stems that allow them to float on the water's surface. Examples include water lilies and duckweed.

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Final Answer

\[
\boxed{
\begin{array}{ll}
1. & \text{Terrestrial plants} \\
2. & \text{Aquatic plants} \\
3. & 71\% \\
4. & \text{Aerenchyma} \\
5. & \text{Deciduous forests} \\
6. & \text{Desert regions} \\
7. & \text{Evergreen plants} \\
8. & \text{Marshes} \\
9. & \text{Carnivorous plants} \\
10. & \text{Saprophytes} \\
11. & \text{Submerged aquatic plants} \\
12. & \text{Floating aquatic plants} \\
\end{array}
}
\]