Question

Match the columns

column A	coulmn B
1. A change which cannot be  easily reversed	a. man-made change
2.A change that repeats itself at  regular  intervals	b. chemical change
3. A change that is made by humans	c. physical change
4. A change in which the original substance cannot  be obtained	d. periodic change
5. A change where no  new substance is formade	e. irreversible change
	f. slow change

Answer 1

column A	coulmn B
1. A change which cannot be easily reversed	e. irreversible change
2.A change that repeats itself at  regular  intervals	d. periodic change
3. A change that is made by     humans	a. man-made change
4. A change in which the            original substance               cannot be obtained	b. chemical change
5. A change where no  new        substance is formade	c. physical change