Class 7 Science Worksheet (Mix-3) worksheet - Free Printable

Let's solve the worksheet step by step:

Fill in the blanks:

1. The number of times a person breathes in a minute is termed as
- Answer: Respiratory rate
- Explanation: The respiratory rate refers to the number of breaths a person takes per minute.

2. The small opening on the sides of the body of a cockroach are called
- Answer: Spiracles
- Explanation: Spiracles are small openings on the sides of an insect's body that allow for gas exchange (oxygen and carbon dioxide).

3. If soil contains a greater proportion of big particles, it is called as
- Answer: Sandy soil
- Explanation: Sandy soil has larger particles compared to other types of soil, such as clay or loam.

4. Amount of water divided by Percolation time is called as
- Answer: Percolation rate
- Explanation: The percolation rate is calculated by dividing the volume of water by the time it takes for the water to pass through a given medium (e.g., soil).

5. A _______ is a dark funnel-shaped cloud that reaches from the sky to the ground
- Answer: Tornado
- Explanation: A tornado is a violent rotating column of air that extends from a thunderstorm to the ground, often appearing as a dark funnel.

6. The climate of north-east India is
- Answer: Tropical monsoon
- Explanation: North-east India experiences a tropical monsoon climate, characterized by distinct wet and dry seasons.

7. Satellites and radars help to predict and monitor
- Answer: Cyclones
- Explanation: Satellites and radars are used to track and predict the movement and intensity of cyclones (hurricanes or typhoons).

8. Instrument used to measure wind is called
- Answer: Anemometer
- Explanation: An anemometer is a device used to measure wind speed and direction.

9. An elephant’s tusks are its modified
- Answer: Incisors
- Explanation: Elephants' tusks are elongated incisor teeth that have evolved over time for various purposes, such as digging, defense, and display.

10. Finland lies in the _______ region while Uganda lies in the _______ region
- Answer: Finland lies in the Arctic region, while Uganda lies in the Equatorial region.
- Explanation: Finland is located in northern Europe, close to the Arctic Circle, making it part of the Arctic region. Uganda, on the other hand, is located near the equator in East Africa, placing it in the Equatorial region.

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Final Answers:

1. Respiratory rate
2. Spiracles
3. Sandy soil
4. Percolation rate
5. Tornado
6. Tropical monsoon
7. Cyclones
8. Anemometer
9. Incisors
10. Arctic region; Equatorial region

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Boxed Final Answer:

\[
\boxed{
\begin{array}{l}
1. \text{Respiratory rate} \\
2. \text{Spiracles} \\
3. \text{Sandy soil} \\
4. \text{Percolation rate} \\
5. \text{Tornado} \\
6. \text{Tropical monsoon} \\
7. \text{Cyclones} \\
8. \text{Anemometer} \\
9. \text{Incisors} \\
10. \text{Arctic region; Equatorial region}
\end{array}
}
\]