Download write the scientific term

Egyptian language School
(Science – grade 4 – first term)
Model Answers for General Book Exercises
Ex(1) p.( 90, 91, 92, 93)
Q1: complete:
1.
2.
3.
4.
5.
6.
7.
1 m3.
28 , 365 and quarter.
Day and night, four seasons.
Metals , non metals.
Physical.
Mercury, Neptune.
Liquid, solid.
Q2: Choose:
1.
2.
3.
4.
5.
Jupiter.
Carbon.
8.
Condensation.
Aluminium.
Q3: write the scientific term:
1.
2.
3.
4.
5.
Matter.
Stars.
Iron rust.
The earth.
. The moon.
Q4: G.R:
1. Because, it reflects the sunlight falling on its surface.
2. Because, iron is a solid matter that has definite shape and volume.
Q5: Match:
1.
2.
3.
4.
5.
E
F
B
C
A
Q6: The least mass and volume is the cube that has, length = 4Cm, width =
4Cm and height = 1Cm.
The volume = 4× 4 × 1 = 16 Cm 3 .
Q7:G.R:
1. Due to the rotation of the earth around itself (its axis).
2. Due to the revolution of the earth around the sun.
Q8:
1. Metals are shiny , so the shiny element will be a metal while the other one
which is not shiny will be a non metal.
Ex.2 P. (94, 95, 96)
Q1: G.R:
1.
2.
3.
4.
5.
6.
Because, they are metals and metals are conductors of heat.
Due to the inclined axis of the earth.
Due to the condensation of water vapour on the outer surface of the bottle.
Because, it is a good conductor of electricity.
Because, it is a malleable metal.
Because, it is very far from the sun (the 7th planet).
Q2: Choose:
1. Cm3.
2. A decrease in heat.
3. Melting of ice.
4. Rotation of the earth around the sun.
5. Ammonia.
Q3: correct the following sentences:
1. Graduated cylinder is used to determine the volume of irregular small
stone.
2. The mass of equal volumes of different materials is different.
3. Freezing is the change of matter from the liquid state to the solid state.
4. Element is the simplest form that the matter found on it.
5. Adding table salt to water and stir it, the table salt disappears forming a
salty solution.
6. The sun is a star and it emits light.
Ex(3) P.( 97, 98, 99, 100, 101)
Q1: Complete:
1. 1000
2. 1000
3. Cm, m.
4. 4.Evaporation.
5. Metals.
6. Physical, chemical.
7. Electricity.
8. Dark.
9. Hours of day and night.
10 . planets.
11 . 21%
12 . winter.
13 . Carbon dioxide.
Q2: Choose:
1. length× width × height.
2. 20.
3. measuring cylinder containing water.
4.
5.
6.
7.
8.
9.
copper.
Gaseous.
Bromine.
Condenses.
Sun.
Venus.
Q3: Write the scientific term:
1.
2.
3.
4.
5.
6.
7.
8.
9.
Matter.
Gram .
Physical change.
Condensation.
Freezing.
Metals.
The moon.
Mars.
Saturn.
10 . Nitrogen.
Q4: Put (√) or (×):
1. √.
5 . ×.
9 . ×.
2. ×.
6. √.
10. √.
3. √.
7. √.
11 . ×.
4. √
8. ×
12 . ×.
Q5: Correct the underlined word:
1. Length.
2. Common balance.
4 .liquids.
5. Carbon.
3. Mercury.
6. Carbon dioxide.
7. Spring and autumn.
Q6: Cross the odd word:
1. Sulphur.
2. Iron.
4 . bromine.
5 . moon.
3. Mercury.
Q7: What is meant by:
1. Melting: it is the change of matter from solid state to liquid state by
heating.
2. Mass: it is the amount of matter in an object.
3. Physical change: it is a change in the shape of matter without any change in
its structure.
4. Chemical change: it is a change in the structure of matter giving a new
substance with new properties.
5. Metal: it is a shiny element and good conductor of heat and electricity.
Q8: Compare between:
Physical change
Chemical change
it is a change in the shape of matter
without any change in its structure.
it is a change in the structure of matter
giving a new substance with new
properties.
Metal
Non metal
It is a shiny element – good conductor It is not shiny – bad conductor of heat
of heat and electricity.
- bad conductor of electricity
except carbon.
Sun
It is a shiny body in the sky that emits
heat and light.
Earth
Mars
It is a dark body that revolve around
the sun - called the red planet.
Moon
A dark body revolves around the sun A dark body that reflects the sunlight
and we live on it.
falling on its surface.
The sequence of the day and night The sequence of the four seasons
It is a phenomenon occurs due to the
rotation of the earth around itself
once every 24 hours.
It is a phenomenon occurs due to the
revolution of the earth around the
sun once every 1 year.
Q9: What happens when…………..?
1. it will change from the solid state (ice) to liquid state (water)… melting
process.
2. it will rust ( a chemical change occurs )
3. it will change from the liquid state (water) to solid state (ice) …. Freezing
process.
4. water vapour will change into water (liquid) and condenses on the cold
surface.
Q10: G.R:
1.
2.
3.
4.
5.
6.
7.
Because, graphite is a good conductor of electricity.
Because, copper is a good conductor of electricity.
Because, it is the nearest star to us.
Because , it is a dark body revolves around the sun in fixed orbit.
Because, the earth rotates around itself once every 24 hours.
Because, the earth revolves around the sun once every 1 year.
Because, carbon dioxide gas produced during blowing in the lime water
changes it into turbid (milky).
8. Because, it doesn’t help in burning.
Q11: Answer the following:
1. Oxygen gas is very important for respiration of all living organisms – for divers
who carry oxygen cylinders on their backs to breathe under the water surface
– in making oxyacetylene flame used for cutting and welding metals.
2. Used in the industry of ammonia and nitrogenous fertilizers.
3. For green plants to make their own food by the photosynthesis process –in
making soda water – to extinguish fire.
4.Complete:
Physical change
Chemical change
Sugar dissolving in water.
Wax melting.
Wood burning.
Iron rust.
5. Venus – earth – mars - saturn – Uranus – Neptune.
Model Exam (1)
P. (102 – 103)
Q1: Complete:
a.
b.
c.
d.
e.
Mass.
Carbon dioxide .
The earth.
Mercury.
Chemical.
Q2: put (√) or (×):
a. × ,
b. × ,
c. √ ,
d. ×
,
e. √
Q3: Choose:
a.
b.
c.
d.
e.
Melting of salt in water.
Graduated cylinder.
Aluminium.
Evaporation.
21%.
G.R:
1. because, it reflects the sunlight falling on its surface.
2. due to the revolution of the earth around the sun once every 1 year.
b. Write the scientific term:
1. the eight planets.
2. Physical change.
3. Sensitive balance.
Model Exam (2)
P. (104 – 105)
1.
Write the scientific term:
a. Evaporation.
b. The sun.
c. Gas.
2. Complete:
a.
b.
c.
d.
e.
f.
Stars.
21%.
Chemical.
Mass.
Eight.
Physical.
3. Put (√) or (×):
a. × ,
b. √ ,
c. √
,
d. × ,
e. √
.
4 . (a) G.R:
1. Because, the earth rotates around itself once every 24 hours.
2. Because, carbon dioxide gas changes the clear lime water into turbid
(milky).
(b) What happen when……?
3. water will change into ice (freezing process).
4. water vapour will change into water (condensation process) .