Science Class VIIth Test From Chapter 13 – Motion and Time

M.M: 43 marks                           Date: 18/06/2011 Time: 1 hour 15 minutes

Q 1: Write True or False for the give statements, also correct the false statements.  (1 mark per question x 10 = 10 marks)

i. In ancient times, measurement of time was done by watches –
ii. A day has 8,640 seconds –
iii. The body moving in a curved line is said to have curvilatory motion –
iv. The time taken for one oscillation is called time gap –
v. Time = (Speed) / (Distance) -
vi. The basic unit of speed is km./min. –
vii. The time period of a pendulum is constant –
viii. The symbols of all the units of distance and time etc. is written in plural –
ix. By only knowing the distance covered by two bodies, it can be found which is faster –
x. If the distance-time graph of an object is a horizontal line parallel to the time axis, then the object is moving at constant speed -

Q 2: Fill in the blanks (1 mark per question x 13 = 13 marks, more than one word may come at certain blanks).

i. The point of intersection of ____________ and ___________ is called origin.
ii. The __________ of an object can be obtained from the distance-time graph.
iii. A __________ ________ is a diagram which shows the percentage composition of something in the form of slices of a circle.
iv. A ________ measures time by the position of the shadow cast by the Sun.
v. Sand clock is also known as _________________.
vi. 10 ___________ = 1 century.
vii. 10 centuries = 1 _____________
viii. Clocks are based on the principle of ______________ motion.
ix. The time-period of a pendulum depends on its _____________.
x. One complete to-and-fro movement of the pendulum bob is called an _____________.
xi. The maximum displacement of the bob form its mean position on either side is called the _____________ of pendulum.
xii. The quartz clocks and watches can be two types: _____________ and __________________.
xiii. The smallest time interval that can be measured with commonly available clocks and watches is ________________.

Q 3: Which of the two is a bigger unit of time: microsecond or nanosecond?                     (1 mark)

Q 4: What is the smallest time interval which can be measured accurately with clocks and watches used in Sports Meets?                                (1 mark)

Q 5: A pendulum takes 270 seconds for 18 complete oscillations. What is the time-period of this pendulum?                                         (2 marks)

Q 6: Calculate the number of seconds in one year.          (2 marks)

Q 7: The given figure shows the distance time graph for the motion of two vehicles A and B. Which one of them has faster speed?       (2 marks)

Distance Time graph

Q 8: Out of a line graph, a pie chart and a bar graph, which one will be suitable for the given cases:                                            (3 marks)

i. Runs scored in various over of a cricket match.
ii. Percentage composition of air
iii. Distance covered by a truck with time.

Q 9: A bus starts from rest at 9 AM. The distances covered by the bus at various instants of time are given below.                                             (3 marks)

Distance (km)	0	25	50	75	100
Time (AM)	9	09:30	10:00	10:30	11:00

i. Draw the distance-time graph for the bus.
ii. What was the distance covered by the bus at 10:45 AM?

Q 10: A sprinter attains a maximum speed of 12 m/sec. Calculate his speed in:                  (2 marks)

i. km/hr
ii. mm/sec

Q 11: What is meant by uniform and non uniform motion? Give an example of each.           (2 marks)

Q 12: A car moves with a speed of 50 km/hr for 15 minutes and then with a speed of 70 km/hour for the next 15 minutes. Find the total distance covered by the car.                                   (2 marks)

Science Class 7th Test Paper From Acids, Bases And Salts-1

M.M: 39 marks                                                  Dated: 16/06/2011

Time:  45 minutes

Q 1: Write True or False for the following plus write the correct answer for the false statements:         (1 mark each x 10 = 10 marks)

  i.  The word acid comes from the latin word “acere” which means bad - _________.

 ii.  Substances which are bitter in taste and feel soapy on touching are called salts - _________.

 iii.  Acids turn red litmus blue - ____________.

 iv. Neutral solutions are more acidic and less basic - ___________.

  v.  Sodium hydroxide turns red litmus to blue - _________.

  vi. The symbol for sodium is S - ________.

  vii. The symbol for potassium is K - _________.

 viii. The sting of an ant contains an acid called acetic acid - _________.

 ix. The formula for sodium hydroxide is NaOH - ________.

 x. The formula for hydrochloric acid is HoCl - ________.

Q 2: Fill in the blanks                                                       (1 mark each x 16 = 16 marks)

i.   The formula of sodium chloride is __________.

ii.  The formula of sulphuric acid is ___________.

iii. Acid + Base -------------> __________ + Water.

iv. Name of one common antacid is _________________ (more than one word may come).

v.  The formula of water is ____________.

vi. The formula of nitric acid is _____________.

vii. In case of ___________ substances, when one drop of their solution is put on either blue litmus or red litmus paper, there is no change in the colour of litmus paper.

viii. ______________ turns red litmus to blue.

ix. A base which is soluble in water is called an __________.

x.  ________ acid is used in making storage batteries for cars, buses, trucks, inverters.

xi.   _________ acid is used in fizzy soft drinks and soda water.

xii.  ________ acid is present in curd and in sour milk.

xiii. __________ acid is present in tamarind, unripe grapes, and unripe mangoes.

xiv.  ___________ acid is present in spinach.

xv.   _______ acids are the naturally occurring acids which are found in various types of plants and animals.

xvi.  ___________ turn blue litmus to red.
 

Q 3: Name one natural and one synthetic indicator.            (1 mark)

Q 4: Write names of two neutral substances.                       (1 mark)

Q 5: Blue litmus paper is dipped in a solution. It remains blue. What is the nature of the solution? Explain.                       (2 marks)

Q 6: What is meant by acid rain? How is acid rain caused? What two damages are caused by acid rain?                                (3 marks)

Q 7: Name two materials which should be added to acidic soil to reduce the acidity. Give reason.                                          (3 marks)

Q 8: What are three types of salts? Give one example of each type of salt.            (3 marks)

Science Class 7th Test From NCERT Chapter 1: Nutrition In Plants

M.M: 41 marks                                                                                Dated: 15/06/2011
Time: 1 hour 


Q 1: Fill in the blanks                                                     (1 mark each x 26 = 26 marks)


i.    ___________ is the mode of taking food by an organism and its utilization by the body.
ii.    Photosynthesis takes place mostly in green leaves which contain green pigment, ________________ inside _______________
iii.    The mode of nutrition in organisms which derive their food from the body of some other living organism is called _________ nutrition.
iv.    In a _________________, algal and fungal partners live together and both are mutually beneficial.
v.    6 CO2 + 12 H2O (in the presence of sunlight and chlorophyll) -->  ______________ + 6 O2 + 6 H2O
vi.    A plant that has both autotrophic and heterotrophic mode of nutrition is __________________
vii.    The presence of starch in a food item can be tested by using ____________________   ________ solution.
viii.    _____________ is an example of total parasite.
ix.    Saprophytic plants lack ______________
x.    Plant food factory: ______________
xi.    Depending on mode of nutrition, green plants are called _______________ and animals are called ______________.
xii.    The process of photosynthesis first produces a simple carbohydrate called ___________________ as food.
xiii.    One pore is called _______________.
xiv.    Water and minerals present in the soil are absorbed by the ______________ of a plant and transported to its leaves through the inter-connected pipes like _____________ vessels.
xv.    The glucose carbohydrate is made up of three elements: __________, _____________ and ______________
xvi.    The __________ is a food which is stored in various parts of a plant such as roots, stem, leaves and seeds.
xvii.    _____________ energy is converted into _________________ energy during photosynthesis.
xviii.    Two examples of saprophytes are _______________ and _____________________.
xix.    Two common examples of insectivorous plants are ___________________ and ______________.
xx.    _____________ bacteria convert nitrogen gas of air into water soluble nitrogen compounds called nitrates.
xxi.    Fungi like _______________ and _______________________ are useful.
xxii.    NPK fertiliser provides ___________________, _______________ and _________________
xxiii.    Two examples of leguminous plants are ________________ and _______________
xxiv.    In biology, a _____________ is the smallest unit of life.
xxv.    The thin outer covering of the cell is called ______________________.
xxvi.    There are tiny air spaces in the cytoplasm of an animal cell which are called ________________.


Q 2: The nucleus in a cell is surrounded by a jelly like material. Name this material. (1 mark)

Q 3: Why do farmers spread fertilisers and manures in the fields?                          (1 mark)

Q 4: Consider the following organisms: Lichen, Mushroom, Cuscuta, Grass, Pitcher plant. Out of these, which one is:                                                                               (2 marks)

i.    An autotroph
ii.    A saprophyte
iii.    Symbiotic plant
iv.    A partial heterotroph


Q 5:  Name one plant in which photosynthesis occurs in plant part other than leaves. Name the plant part.                                                                                                   (2 marks)

Q 6:   How would you test the presence of starch in leaves? Write in brief.           (2 marks)

Q 7:   Draw inner structure of a leaf and show various components in it.                (2 marks)

Q 8:   What controls the opening and closing of stomatal pores?                            (1 mark)

Q 9:   Explain why we cannot make food ourselves by photosynthesis like the plants do?             (1 mark)

Q 10: What are the two main modes of nutrition in organisms?                            (1 mark)

Q 11: With the help of only a labelled diagram show photosynthesis in plants.     (2 marks)