CBSE Class 10 Science Solved Question Paper 2013

Find CBSE Class 10 Science Solved Question Paper 2013. These questions not only helps the students to prepare for exams in a better manner, but also helps them in understanding the depth with which a topic should be studied.

Few Sample Questions from the Question Paper are given below:

Q. How many horizontal rows are there in the modern periodic table and what are they called?

Sol. There are 7 horizontal rows in the modern periodic table. They are called periods.

Q. List any two factors that could lead to speciation.

Sol. Geographical isolation and genetic drift could lead to speciation.

Q. Mention one negative effect of our affluent life style on the environment.

Sol. Exploitation and overconsumption of natural resources will ultimately result in their scarcity.

Q. Mention two functions of the human testis.

Sol.

(a) They produce male germ cells i.e. sperms.
(b) They act as endocrine glands and secrete the hormone testosterone which controls secondary sexual characters in males.

Q. Every one of us can do something to reduce our consumption of various natural resources. List four such activities based on the 3-R approach.

Sol.

(a) Use of materials such as paper should be preferred as they can be reused and recycled.
(b) Materials like glass and some plastics can be recycled on heating and get easily converted into different products like toys, containers which can be reused again.
(c) e-wastes such as unused computers, mobiles etc. can be repaired and used again.
(d) Household wastes such as vegetable wastes etc. can be used as manure for plants.