Desirable and Undesirable Changes

Q.

What are desirable and undesirable changes?

Q.

Differentiate between desirable and undesirable changes.

Q.

Differentiate between desirable changes and undesirable changes.

Q.

The beating of the heart is an example of

1. Slow change

2. Undesirable change

3. Man-made change

4. Fast change

Q.

Explain the following terms with examples.

Desirable change.

Q.

The changes which are beneficial to living beings are known as __________ changes.

Q.

What do you mean by desirable changes?

Q. Occurence of flood is a/an change.

1. desirable
2. undesirable
3. periodic

Q.

Who gave the law of constant proportion?

Q.

Corrosion of metals is an example of a chemical change.

1. True

2. False

Q.

Deforestation is a natural change.

1. True
2. False

Q.

Give an example of each type of change:

A desirable change

Q. A sheet of paper is used to make a paper boat. Identify the changes involved in this.

1. Natural
2. Man-made
3. Temporary
4. Permanent

Q. Volcanic eruption is an example of desirable change.

1. False
2. True

Q. Deduce the number of neutrons from the atomic number (Z) and mass number (A). [3 marks]

Q. Which of the following are desirable changes?

1. Ripening of fruits
2. Spoiling of food
3. Blooming of flowers
4. Breaking of mud pots

Q.

A desirable change has_______ results

Q. Occurence of flood is a/an change.

1. undesirable
2. periodic
3. desirable

Q.

The changes which are beneficial to live beings are known as _______ changes.

Q.

Answer in one word.

A change that we want to take place and is useful to us________.

Q. Which amongst the following changes doesn’t requires the involvement of humans?​

Boiling of water​	Carving on rocks​	Ripening of fruits​

1. Ripening of fruits​
2. Boiling of water​
3. Carving on rocks​

Q. Which of the following is/are undesirable changes?

1. Rusting
2. Ripening of fruit
3. Deforestation
4. Cooking of food

Q.

Define the following

2.Desirable change