Define cross pollination.

Important Questions on Yearly Examination (Based on Chapters 10-18)

MEDIUM

7th CBSE

IMPORTANT

LEARNING SCIENCE>Chapter 22 - Yearly Examination (Based on Chapters 10-18)>Yearly Examination (Based on Chapters 10-18)>Q 2

The bob of a simple pendulum takes $0.25$ seconds to go from one extreme position to mean position. Calculate the time period of the pendulum.

EASY

7th CBSE

IMPORTANT

LEARNING SCIENCE>Chapter 22 - Yearly Examination (Based on Chapters 10-18)>Yearly Examination (Based on Chapters 10-18)>Q 3

Write the causes of deforestation.

EASY

7th CBSE

IMPORTANT

LEARNING SCIENCE>Chapter 22 - Yearly Examination (Based on Chapters 10-18)>Yearly Examination (Based on Chapters 10-18)>Q 4

What does cause tooth decay?

EASY

7th CBSE

IMPORTANT

LEARNING SCIENCE>Chapter 22 - Yearly Examination (Based on Chapters 10-18)>Yearly Examination (Based on Chapters 10-18)>Q 5

What is the difference between conductors and insulators of electricity?

EASY

7th CBSE

IMPORTANT

LEARNING SCIENCE>Chapter 22 - Yearly Examination (Based on Chapters 10-18)>Yearly Examination (Based on Chapters 10-18)>Q 1

What happens to the ribs and diaphragm during inhalation and exhalation?

EASY

7th CBSE

IMPORTANT

LEARNING SCIENCE>Chapter 22 - Yearly Examination (Based on Chapters 10-18)>Yearly Examination (Based on Chapters 10-18)>Q 2

What are the changes that occur in a flower after fertilisation?

EASY

7th CBSE

IMPORTANT

LEARNING SCIENCE>Chapter 22 - Yearly Examination (Based on Chapters 10-18)>Yearly Examination (Based on Chapters 10-18)>Q 3

What is an electromagnet? How can the strength of an electromagnet be increased?

EASY

7th CBSE

IMPORTANT

LEARNING SCIENCE>Chapter 22 - Yearly Examination (Based on Chapters 10-18)>Yearly Examination (Based on Chapters 10-18)>Q 4

Write the characteristics of an image formed in a plane mirror.