Science Revision Worksheet (2nd Term)

The City School 

Jr. B PECHS 

Science Grade 3 

2nd Term Reinforcement Worksheets 

Topic: Magnets

Q1: Choose the correct answer

1.    Which material can you pick up with a magnet?

a.     Plastic        b. wood     c. iron         d. glass

2.    You can tell a piece of metal is a magnet if __________

a.     it will repel a magnet       b. it will attract a magnet

c. it will attract a piece of aluminum     

d. it is painted in two different colors.

    3. Sita tested three different magnets to pick up some paper clips.

          Magnet A picked 3 paperclips

Magnet B picked 5 paperclips

Magnet C picked 10 paperclips

Magnet C D picked 7 paperclips

        Which magnet picked up the most paper clips?

a.magnet A         b. magnet B        c. magnet C         d. magnet D

   4.  Jack has two magnets. He wants to find out which magnet is the            strongest. He picks up 15 paper clips with one magnet. Which things should Jack try to pick up when he tests his other magnet?

         a. paper clips       b. thumb pins     c. nails        d. needles

   5. Magnets have ______ poles

          a. two         b. three      c. four        d. five

   6. Two magnets are placed next to each other and repel each other apart. What is one possible explanation for this?

a. The north pole of both the magnets are facing one another.

b. One magnet is made of gold

c. One magnet is made of aluminum.

d. The north pole of one magnet is facing the south pole of the other magnet.

 7.  Sometimes a magnet cannot attract a can because

a. it is heavy        c. it is made up of aluminum        

b. it is opened     d. it is light

8. Magnet A can hold 3 steel paperclips. Magnet B can hold 7 steel paperclips. Which is the strongest magnet?

a. magnet A        b. magnet B        c. no one    d. They are equally strong

9. The pushing or pulling force of a magnet is:

a. Strongest in the middle of the magnet

b. Strongest at the ends of the magnet

c. The same all the way through the magnet

d. Weakest at the ends of the magnet

10. Magnetism is a type

a. electricity        b. gravity   c. force       d. pressure

Q2.  Write the given objects names into the correct box

 wood         iron key               plastic bottle       nails           aluminum can   

diamond    thumb pins         iron fork     book           iron fork     iron fork                       

Non-magnetic Materials	Magnetic Materials

Q3. State true or false

1.    Magnets that work with electricity are called electromagnets           

2.    Magnet does not help to hold the fridge door closed                

3.     Magnets that attract each other are used to hold the trains above a track.                  

4.    Magnets can move scrap metals around.                

Q4. Answer the following

1.    Write any three names of different kinds of magnets.

2.    Explain how magnets can be useful in recycling of metals.

3.    Write any two uses of magnets.

Topic : Plants

Q1 . Choose the correct answer

1. What part of the carrot plant do we eat?

a. root             b. stem            c. leaf              d. flower

2. When a plant grows it ______________

 a. gets shorter            b. dies              c. gets taller                d. drops its leaves

3. What do leaves do?

 a. make water            b. make heat              c. make food               d. take water from the soil.

4. What job does the root of a plant NOT do?

a. take up water and nutrients from the soil.

b. keep the plant steady and upright.

C. make food and send it to the rest of the plant.

5. Plants and animals are ____________

a. living things    b robots     c. non-living things   d. plastic

6. Trees have very thick stem. What is called?

a. trunk              b. thick stem              c. thin stem                 d. stick

7. A plant gets more water if it has lots of ____________.

a. roots            b.stems            c. flowers          d. fruits.

8. Plants give out __________________ which animals and people breathe in.

a.      carbon dioxide            b. oxygen  C. nitrogen    d. hydrogen

9. We eat leaves of ________________

a. spinach          b. carrot        c. peas             d. sugar cane

10.The more water a plant is given , the better it will grow. Is this statement true or false?

a. true             b.  false           c .it is impossible to say

Q2. State whether True or False:

a. A plant that is kept in darkness will grow better than other plants. (_________ )

 b. We can eat every part of every plant ( __________ ).

 c. Farmers use insecticides to avoid the pests from eating the plants. ( _________).

d. The stem makes the food for the plant. ( ____________ )

e. Oak trees can grow in the winter season. ( ___________ ).

Q3. Give reasons:

a. Farmers usually kill small insects because

b. Colored water turns a flower blue because

c. Plants can grow better in a green-house because

d. Grass covered with plastic turns yellow because

Q4. Write down the answer of following questions:

Q1. (a) Why are plants important to us?                                                     

 (b) Write down three things a plant needs to grow well.                             

Q2.What will happen to a white plant if you put it into red ink?

Q5. Label the parts of a plant

                                              Topic : Rocks

Q1. Choose the correct answer.

1.   Which of the following rocks is permeable?

A.  Slate         B.  Marble                C.   Chalk                  

2.   Which rock splits easily into thin sheets?

 A.  Marble   B.   Slate                    C. Granite

3.   What would be a good rock to tile a roof with?

A.  Chalk        B.   Slate        C. Pumice

4.   Chalk is used to write on blackboards because.

 A.  It wears away easily               B.   It is permeable             C.   It does not float

5.   Granite is often used for steps because

 A.  It  is permeable            B.   It doesn’t wear away easily              C.   It doesn’t float

 6.   Marble is often used for statues or grand buildings because

A.   It has attractive textures and colours.

B.   It splits easily into thin sheets

C.   It wears away easily

7.  Flint and sandstone are two rocks. Sandstone can be scratched with a steel nail. Flint cannot. Which is the harder rock?

 A.  Flint         B.  Sandstone         C.   It’s impossible to tell

8. Which rock is the solidified lava froth from a volcano?

A. marble
B. sandstone
C. pumice 

9. What could be a problem with a monument made from chalk? 

A. It wouldn’t float

B. It couldn’t be shaped.

C. It could crumble over time

10. What do all rocks have in common?

A.     same size             B. same colour           C. they all have minerals

Q2. Fill in the blanks.

 1.   There are three main types of rocks on earth surface igneous, metamorphic 

and___________________

 2.   The Taj Mahal in India is made up of  ___________________    , a type of 

metamorphic rock.

 3.   Igneous rock comes from______________  eruption.

4.   Very small stones are called _____________________.  

5.   Rocks are made of tiny pieces called _______________________  .

6.   _________________  is used to make toothpaste.

7.   Grains of different colours in rocks are ____________________  .

8.   Birds eat small_______________ which help them to break up the food inside 

them.

9. Some minerals grow into big _____________

10.Bricks are made by heating ________________.

Q3. Guess who am I?

1)    I am a molten rock when I am underground.______________

2)    I describe the shape and sizes of the grain._________________

3)    I am turned into marble when heated and squashed inside the Earth._____________

4)    I am a small, rounded piece of rock.________________

Q4. Complete the following statements about granite.

a.   The black grains are a mineral called______________ .

b.   The grey grains are____________________ .

c.   The _________________   grains are feldspar.

 Q5. Answer the following

a.Which rocks are used for making roads and railways?

___________________________________________________

b. Write any two things that can make a rock wear away.

_____________________________________________________________________

_________________________________________________________________

Q6. Match the following and write the answer in the column C       

                         

Column A	Column B	Column C
1.Magma	a. Bits of broken up of rock
2.Sediments	b. The name for molten rock when it is underground
3.Lava	c. Rocks made when molten rock cools down
4.Sedimentary	d. Rocks that have been changed by heat or by being squashed.
5.Igneous	e. Rocks made from bits of broken rock
6.Metamorphic	f. Molten rock that flows from a volcano

Q7.  Write any one example of each of the following rocks      

                                                           

Types of rocks	Examples
Sedimentary
Igneous
Metamorphic

Topic: Springs

Q1. Choose the correct answer

1.    When you squash or compress a spring down with your hand, you feel

a.     an upward push on your hand

b.    a downward push on your hand

c.     neither push or pull

d.     both push and pull on your hand

     2. Why do some chairs have springs inside?

a. to make them comfortable to sit on.

b. to make them uncomfortable to sit on.

     c. because springs are magnetic

     d. to make the seat hard
   

    3. The harder you squash or compress a spring down with your hand

a. The harder the downward force on your hand.

b. The lighter the upward force on your hand

c. The harder the upward force on your hand.

d. The lighter the downward force on your hand.

     4. A spring pushes back when it is _______________

a.     compressed    b. stretched         c. twisted            d. broken

    
     5. The spring in trampoline makes it:

a.     bouncy           b. flexible            c. bendy              d. hard

Q2. Fill in the blanks with the help of given words

  Harder      stretchy     mattresses     spring       pulling back   chairs                      

Springs are ____________. They are used in ______________ and 

_____________ to make them comfortable.

If you pull on a _________, it stretches. You can feel it _______________.

 The more you stretch a spring, the ____________ it pulls back.

Q3.  Answer the following

1.    How does a wind-up toy work?

2. How does a hair clip hold onto hair?

3.    Look at these 3 springs below. Why is spring 2 the longest?  Give your reason below.