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
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Magnetic Materials
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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
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Column B
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Column C
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1.Magma
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a. Bits of broken up of rock
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2.Sediments
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b. The name for molten rock when it is
underground
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3.Lava
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c. Rocks made when molten rock cools
down
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4.Sedimentary
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d. Rocks that have been changed by
heat or by being squashed.
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5.Igneous
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e. Rocks made from bits of broken rock
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6.Metamorphic
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f. Molten rock that flows from a
volcano
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Q7. Write any one example of each of the following rocks
Types of rocks
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Examples
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Sedimentary
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Igneous
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Metamorphic
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