# NCERT Exemplar Solutions Class 7 Science Solutions for Forests: Our Lifeline - Exercise in Chapter 17 - Forests: Our Lifeline

Question 12 Forests: Our Lifeline - Exercise

State whether the following statements are true or false. If false, give the correct statement.

(a) Forests influence climate, water cycle and air quality.

(b) In a forest, trees form the uppermost layer, followed by herbs. The shrubs form the lowest layer of vegetation.

(c) The forest keeps on growing and changing and can regenerate.

(d) Forests protect the soil from erosion.

a) True

b) False- In a forest, trees form the uppermost layer, followed by shrubs. The herbs form the lowest layer of vegetation.

c) True

d) True

Video transcript
"hey guys welcome to lido q a video i am vinit your leader tutor bringing you this question on your screen the question is define mass of a body right what is the si unit of mass define the weight of a body what is the si unit of weight what is the relation between the mass and weight of a body okay now let's define each one of them right so first we are going to define mass so number a mass of a body so mass of a body is defined as the quantity of matter contained in it right the si unit of mass is we all know this kg right now for weight weight is a term that we generally use synonymously for mass right but weight and mass are quite different we all know that right so let us define weight weight of a body is a force with which it is attracted towards the center of the earth right the si unit of weight is newton and what is the relationship between weight and mass right the relationship is that weight weight is directly proportional to mass and is given by w is equal to product of mass into force due to gravity acceleration due to gravity so this is it guys if you still have a doubt please leave a comment below do like the video and subscribe to our channel i'll see you in our next video until then bye guys keep learning"
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