Science worksheet focusing on living and non-living things for students.

Worksheet: Living and Non-living Things

#### Subject – Science

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Q1. Fill in the blanks:

#### a) Insects take in air through spiracles.
- Explanation: Insects breathe through small openings on their bodies called spiracles, which are connected to a network of tubes (tracheae) that deliver oxygen directly to their tissues.

#### b) Animals move in search of food and water.
- Explanation: Animals are living organisms that require food and water for survival. They move to find these resources.

#### c) Plants make their own food.
- Explanation: Plants produce their own food through the process of photosynthesis, where they convert sunlight, water, and carbon dioxide into glucose and oxygen.

#### d) Most plants grow from seeds.
- Explanation: Seeds are the primary means by which most plants reproduce and grow. They contain the embryo of a new plant and the nutrients it needs to germinate.

#### e) Plants respond to stimuli.
- Explanation: Plants can detect and respond to various stimuli, such as light, gravity, touch, and chemicals. For example, roots grow towards water (gravitropism), and stems grow towards light (phototropism).

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Q2. Answer in one word:

#### a) Anything that causes a response in a living thing: stimulus
- Explanation: A stimulus is any change in the environment that triggers a response in a living organism.

#### b) A plant which closes its leaves when touched: Mimosa pudica (or "sensitive plant")
- Explanation: The Mimosa pudica is a well-known plant that responds to touch by closing its leaves as a defense mechanism.

#### c) The time period for which a living thing lives: life span
- Explanation: The life span refers to the duration of time an organism lives from birth to death.

#### d) The part where stomata are present: leaves
- Explanation: Stomata are tiny pores found primarily on the surface of leaves, which allow for gas exchange (e.g., intake of CO₂ and release of O₂ during photosynthesis).

#### e) The part through which fish breathe: gills
- Explanation: Fish use gills to extract oxygen from water. Gills are specialized organs adapted for aquatic respiration.

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Q3. Tick (√) the true statements and cross (X) the false ones:

#### a) Animals produce their own food.
- False (X)
- Explanation: Animals do not produce their own food. They obtain energy by consuming other organisms (plants or animals) or organic matter.

#### b) Non-living things need air.
- False (X)
- Explanation: Non-living things do not have biological processes that require air. Air is essential for living organisms but not for non-living objects.

#### c) Plants respond to stimuli.
- True (√)
- Explanation: Plants can detect and respond to various stimuli, such as light, gravity, touch, and chemicals. This is evident in processes like phototropism and thigmotropism.

#### d) A sunflower does not show any movement.
- False (X)
- Explanation: Sunflowers exhibit a type of movement called heliotropism, where they track the movement of the sun across the sky. This helps them maximize exposure to sunlight for photosynthesis.

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Final Answers:

#### Q1. Fill in the blanks:
a) spiracles
b) Animals
c) Plants
d) seeds
e) respond

#### Q2. Answer in one word:
a) stimulus
b) Mimosa pudica
c) life span
d) leaves
e) gills

#### Q3. Tick (√) the true statements and cross (X) the false ones:
a) X
b) X
c) √
d) X

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Boxed Final Answer:

\boxed{
\begin{aligned}
&\text{Q1:} \\
&\text{a) spiracles} \\
&\text{b) Animals} \\
&\text{c) Plants} \\
&\text{d) seeds} \\
&\text{e) respond} \\
\\
&\text{Q2:} \\
&\text{a) stimulus} \\
&\text{b) Mimosa pudica} \\
&\text{c) life span} \\
&\text{d) leaves} \\
&\text{e) gills} \\
\\
&\text{Q3:} \\
&\text{a) X} \\
&\text{b) X} \\
&\text{c) √} \\
&\text{d) X} \\
\end{aligned}
}