Physical and Chemical Changes — Science STD 7 — Question

Since the Earth is rotating, shouldn’t the stars also appears to move in the sky like the Sun?

Paheli participated in a 400m race competition held at her school and won the race. When she came home she had mixed feelings of joy and pain as she had cramps in her leg muscles. After a massage she was relieved of the pain. Answer the following questions related to the situation. What can be the possible reasons for the pain in her legs?

Which indicators change odour with different substances?

What does the formation of shadows prove about the nature of light?

What happens when magnesium oxide is dissolved in water?

Name the physical quantity that helps to identify which object moves faster or slower.

Where is the bile produced? Which component of the food does it help to digest?

What type of motion does a pendulum exhibit?

Fill in the blanks: The largest gland in the human body is __________.