SCIENCE
HALF YEARLY EXAM
Class – VII
Note – attempt all given questions.
1- choose the correct options
a) . The gas we use in the kitchen is called liquified petroleum gas (LPG). In the cylinder it exist as a liquid. When it comes out from the cylinder it becomes a gas (Change—A) then it burns (Change—B). The following statements pertain to these changes. Choose the correct one:
(a) Process—A is a chemical change.
(b) Process—B is a chemical change.
(c) Both processes A and B are chemical changes.
(d) None of these processes is a chemical change.
b)The false feet of Amoeba are used for:
(a) movement only
(b) capture of food only
(c) capture of food and movement
(d) exchange of gases only
c)The main function of the lacteals of intestine is the absorption of
(a) amino acids
(b) glucose and vitamins
(c) lactic acid
(d) fatty acids and glycerol
d) Which among the following is a physical change?
(a) Cutting a log of wood in small pieces
(b) Burning of wood
(c) Ripening of fruit
(d) Cooking of food
e) When the soil is too basic, plants do not grow well in it. To improve its quality what must be added to the soil?
(a) Organic matter
(b) Quick lime
(c) Slaked lime
(d) Calamine solution
f) When the soil is too basic, plants do not grow well in it. To improve its quality what must be added to the soil?
(a) Organic matter
(b) Quick lime
(c) Slaked lime
(d) Calamine solution
2- Short answer type questions
a) When baking soda is mixed with lemon juice, bubbles are formed with the evolution of a gas. What type of change is it? Explain.
b) Which of the two changes frequently, weather or climate?
c) Is the distilled water acidic/basic/neutral? How would you verify it?
d) you have been pranked ..
3- Fill ups
(a) The main steps of nutrition in humans are ___________, ___________, ___________ , ___________ and ___________
(b) The largest gland in the human body is ___________.
(c) The stomach releases hydrochloric acid and ___________ juices which act on food.
(d) The inner wall of the small intestine has many finger-like outgrowths called ___________
(e) Amoeba digests its food in the ___________ .
4- true and false
a) the paper is leaked.
b)do you think that the same paper would come in exam.
c) you have been pranked
d) you should sincerely study for your exam
Don’t waste your time here…Go and study…
… All the best. …