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SCIENCE EVAL 2- VII CBSE

Total questions: 171

Worksheet time: 2hrs 18mins

Name
Class
Date
1.

2. Identify the given cells in the leaves of the plant:

a)

White blood cells

b)

Red blood cells

c)

Guard cells

d)

Platelets

2.

3. All green plants are ____________________.

a)

Autotrophs

b)

Heterotrophs

c)

Scavengers

d)

Decomposers

3.

4. Water and minerals are transported to the leaves and other parts of the plant by ____________________.

a)

Stomata

b)

Xylem vessels

c)

Phloem vessels

d)

None to the above

4.

5. Chlorophyll is present in the cell organelle called _________________.

a)

Cell membrane

b)

Cytoplasm

c)

Chloroplast

d)

Croton

5.

8. The mutual association in which two different types of organisms live and work together for their mutual benefit is called _______________________.

a)

Symbiosis

b)

Parasitic nutrition

c)

Saprophytic nutrition

d)

Autotrophic nutrition

6.

9. Which of the following is an insectivorous plant?

a)
b)
c)
d)
7.

The plant from which a parasite gets its food is called

a)

Host

b)

Chloroplats

c)

Doddar

d)

Green plants

8.

What does ‘photo ‘ in photosynthesis refer to

a)

Sun

b)

Water

c)

Light

d)

Carbon dioxide

9.

Which of the Following is a Saprophyte

a)

Green plants

b)

Mushroom

c)

Alga

d)

Rhizobium

10.

Stomata are

a)

Tiny pores located underside of Leaves

b)

Photo

c)

Synthesis

d)

Carbon

11.

Rhizobium can convert atmospheric nitrogen into water-soluble compounds

a)

False

b)

True

12.

Carbohydrates,Proteins and Fats are

a)

Nutrition

b)

Food

c)

Nutrients

d)

Autotrophs

13.

Pitcher plant traps insects because it

a)

(a) is a heterotroph.

b)

(b) grows in soils which lack in nitrogen.

c)

(c) does not have chlorophyll.

d)

(d) has a digestive system like human beings.

14.

chlorophyll captures

a)

carbon dioxide from surroundings

b)

energy of the sunlight

c)

minerals from soil

d)

water from air

15.

Starch is also a

a)

carbohydrate

b)

fats

c)

vitamins

d)

proteins

16.

Rhizobium is an example of

a)

(a) Symbiosis

b)

(b) Parasites

c)

(c) Insectivorous

d)

(d) none of these

17.

Foods synthesized in the process of Photosynthesis by plants is stored as

a)

Starch

b)

Protein

c)

Vitamins

d)

Fats

18.

In lichens ______________ and _____________ live in symbotic association.

a)

Bacteria and fungi

b)

Mushroom and Rhizobium

c)

Cuscuta and mistletoe

d)

Algae and fungi

19.

Leguminous plants are examples of _____________________ association.

a)

autotrophic

b)

saprophytic

c)

symbiotic

d)

parasitic

20.

Centrally located spherical structure in cell is the ___________________

a)

cytoplasm

b)

nucleus

c)

cell membrane

d)

cell wall

21.

The enzymes present in the saliva convert

a)

fats into fatty acids and glycerol.

b)

starch into simple sugars.

c)

proteins into amino acids.

d)

complex sugars into simple sugars.

22.

The piercing and tearing teeth is called

a)

incisor

b)

Canine

c)

Pre-molar

d)

Molar

23.

______ takes in food by the use of pseudopodia.

a)

Goat

b)

Tiger

c)

Amoeba

d)

Human

24.

Water from the undigested food is absorbed mainly in the_____.

a)

Stomach

b)

Food Pipe

c)

Small Intestine

d)

Large Intestine

25.

_____transports the nutrients from the undigested food to every cell of the body.

a)

Oxygen

b)

Blood

c)

Water

d)

Nitrogen

26.

The ___ helps in mixing saliva with food.

a)

Heart

b)

Stomach

c)

Nose

d)

Tongue

27.

____ is the largest gland in our body.

a)

Skin

b)

Hand

c)

Liver

d)

Leg

28.

The mode of feeding of the mosquito_____.

a)

Chewing

b)

Cuddling

c)

Scraping

d)

Sucking

29.

Mostly grass eating animals are called____.

a)

Carnivore

b)

Omnivore

c)

Ruminants

d)

Scavenger

30.

The inner walls of the stomach secrete _________.

a)

Mucus & hydrochloric acid

b)

Bile

c)

Lime

d)

Salt

31.

______secretes pancreatic juice.

a)

Liver

b)

Brain

c)

Pancreas

d)

Skin

32.

____ catches insects with it’s tongue.

a)

Snail

b)

Human

c)

Lion

d)

Frog

33.

Digestion starts from _____.

a)

Mouth

b)

Stomach

c)

Liver

d)

Ribs

34.

Liver secrets _____.

a)

Acid

b)

Bile Juice

c)

Base

d)

Water

35.

The process of breaking down of food is called__.

a)

Digestion

b)

Ingestion

c)

Excretion

d)

Respiration

36.

The process of food intake is known as ______.

a)

Excretion

b)

Calculation

c)

Respiration

d)

Ingestion.

37.

The longest part of the digestive tract in humans is the ........................

a)

Oesophagus

b)

Stomach

c)

Small Intestine

d)

Large Intestine

38.

Name the finger like projections present in the small intestine which helps in nutrient absorption

a)

Buccal cavity

b)

Duodenum

c)

Pancreas

d)

Villi

39.

Identify ruminant from the following.

a)

Cat

b)

Cow

c)

Ant

d)

Tiger

40.

Name the process by which the digested food molecules are taken up by the intestine wall and sent to circulatory system.

a)

Assimilation

b)

Digestion

c)

Absorption

d)

Egestion

41.

Which one of the following is a reliable measure of heat?

a)

Hotness

b)

Coldness

c)

Temperature

d)

None of these

42.

Name the device which is used to measure the hotness or coldness of an object.

a)

Picometer

b)

Barometer

c)

Manometer

d)

Thermometer

43.

If we add a lump of ice to a tumbler containing water, ___________.

a)

heat flows from water to ice

b)

heat flows from ice to water

c)

heat flows from water to ice if water is more in quantity.

d)

heat flows from ice to water if ice is more in quantity.

44.

The temperature at which pure ice melts is ___________.

a)

0°C

b)

100°C

c)

-100°C

d)

98.6°F

45.

A thermometer contains __________.

a)

water

b)

mercury

c)

silver

d)

copper

46.

What is the normal body temperature of a healthy person?

a)

37°C

b)

37°F

c)

37°K

d)

98.4 K

47.

Heat always flows ___________.

a)

from a colder object to a hotter object

b)

from a hotter object to a colder object

c)

in both directions

d)

from a stationary object to a moving object

48.

Paheli and Boojho measured their body temperature. Paheli found hers to be 98.6°F and Boojho recorded 37°C. Which of the following statements is true?

a)

Paheli has a higher body temperature than Boojho.

b)

Paheli has a lower body temperature than Boojho.

c)

Both have normal body temperature.

d)

Both are suffering from fever.

49.

The unit of measurement of temperature is ___________.

a)

metre

b)

kilogram

c)

degree celsius

d)

second

50.

The liquid metal used in a thermometer __________.

a)

is able to expand uniformly for all temperatures

b)

is transparent and easy to see

c)

is opaque and difficult to read

d)

is able to expand uniformly for certain temperatures

51.

The upper standard point on the Fahrenheit scale is ___________.

a)

100 °

b)

120 °

c)

212 °

d)

180 °

52.

One degree Celsius rise in temperature is equal to ___________.

a)

1 degree rise on the Kelvin scale

b)

1 degree rise on the Fahrenheit scale

c)

both (a) and (b)

d)

1 degree fall on the Kelvin scale

53.

The increase in length of a solid when heated is called ___________.

a)

thermal expansion

b)

linear expansion

c)

superficial expansion

d)

cubical expansion

54.

SI Scale of temperature is ___________.

a)

Celsius scale

b)

Kelvin scale

c)

Fahrenheit scale

d)

Reaumur scale

55.

Small gaps are left between railway lines because ___________.

a)

rails of very long dimensions will shatter

b)

expansion of rails occurs during summer

c)

contraction of rails occurs during winter

d)

both (b) and (c)

56.

The increase in area of a solid when heated is called ___________.

a)

thermal expansion

b)

linear expansion

c)

superficial expansion

d)

cubical expansion

57.

A bimetallic strip made from brass and invar bends when heated. When it's bent, the object has ___________.

a)

brass on the outside and invar on the inside

b)

invar on the outside and brass on the inside

c)

brass and invar of the same length

d)

brass on the outside for a while and then invar will take its place

58.

The type of energy which causes in us the sensation of hotness or coldness is called ___________.

a)

chemical energy

b)

magnetic energy

c)

light energy

d)

heat energy

59.

Which of the following expands only in volume when heated?

a)

Solid

b)

Liquid

c)

Gas

d)

Both (b) and (c)

60.

Which will not undergo sublimation?

a)

Ammonium chloride

b)

Camphor

c)

Sodium chloride

d)

Iodine

61.

Acid is?

a)

A substance that reacts to metals and carbonates, and has a Ph of below 7.

b)

Often used in drain cleaner.

c)

Something that can only be found in a lab

d)

A bitter tasting substance

62.

A base is

a)

A substance that feels slippery, has a higher Ph than 7, and is often used in drain cleaner.

b)

Has a Ph of below 7 and can react to metal and carbonates

c)

Is only found in a lab

d)

Something water can never be

63.

Water is?

a)

Always an acd

b)

Always a base

c)

Is the most common base, and acid in the world

d)

Always is neutral that is why it is safe to drink

64.

An indicator is?

a)

A lab manual or guide

b)

Something like litmus paper that can tell you if a substance is acidic or basic

c)

A PS4 game where you pretend to direct traffic

d)

Something only scientists in a lab can use

65.

Do acids and bases conduct electricity?

a)

Only acids conduct electricity

b)

Only bases conduct electricity

c)

Bases and acids conduct electricity

d)

Neither conduct electricity

66.

Acid can prevent bacteria from growing

a)

True

b)

False

67.

You can neutralize acid by adding a base that is just as strong?

a)

Ture

b)

False

68.

When you neutralize acid with a base you create

a)

a Salt and water

b)

You can not neutralize acid with a base

c)

You create carbon dioxide

d)

A moderate sized explosion

69.

A substance with a ph of higher that 7.5 is a?

a)

Home dog doggity

b)

Base

c)

Acid

d)

Salt

70.

A substance with a ph of lower than 7 is a

a)

Acid

b)

True OG

c)

Base

d)

Salt

71.

Which of these taste sour?

a)

acids

b)

bases

c)

salts

72.

Which of these feel slippery?

a)

bases

b)

acids

c)

salts

73.

Litmus paper works because it has been treated with

a)

natural dyes

b)

radioactive isotopes

c)

halogens

d)

organic inhibitors

74.

tick the natural indicators

a)

turmeric

b)

phenophthalien

c)

iodine solution

d)

methylene blue

75.
Pure water has a pH of 7. Pure water _______.
a)
is a base
b)
is a neutral substance
c)
could be either an acid or a base
d)
is an acid
76.

When an equal strength acid and base are mixed, what kind of chemical reaction occurs?

a)

Neutralization

b)

Combustion

c)

Oxdation

d)

Decomposition

77.
Tastes bitter.
a)
Acids
b)
Bases
c)
Salts
d)
All
78.
Which of the following is a chemical property of a base
a)
a slippery feel
b)
conducts an electric current
c)
turns red litmus paper blue
d)
forms hydronium ions in water
79.
Most foods are 
a)
Acid
b)
Basic
c)
Neutral
d)
salts
80.
Why does vinegar help preserve things like pickles? 
a)
It keeps moisture in. 
b)
It preserves flavors and crispness
c)
It kills bacteria that break down foods. 
d)
It keeps the cells alive
81.
Litmus paper can tell you if a solution is acidic, neutral or basic by changing color when placed in a solution.  If you test a base with litmus paper, it will turn ____________.
a)
purple
b)
red
c)
blue
d)
pink
82.

What pH range would you get for an acid?

a)

0-6

b)

7

c)

7-14

d)

2-10

83.

What is the effect of Common salt in red litmus paper?

a)

Blue

b)

Red

c)

Green

d)

Remains same

84.

Latic acid is found in.

a)

Curd

b)

Soap

c)

Salt

d)

Oil

85.

Litmus’, a natural dye is an extract of which of the following?

a)

China rose (Gudhal)

b)

Blue berries (Jamun

c)

Lichen

d)

Beetroot

86.

Our A posses B and mucous lining. These help in preventing dirt, dust and germs from entering our C.

a)

A-Nostrils

B-Cilia

C-Respiratory system

b)

A-Nostrils

B-Cilia

C-Ventilatory system

c)

A-Nostrils

B-Vellus

C-Respiratory System

d)

A-Lungs

B-Tragi

C-Digestive system

87.

(a)   respiration mainly takes place in the mitochondria.

88.

Which is one of the processes/factors that produces ethanol in yeast during anaerobic respiration?

a)

LACTIC ACID

b)

FERMENTATION

c)

The CITRIC ACID CYCLE

d)

CARBON DIOXIDE

89.

During diffusion in alveoli gases pass through (a)   which are thin.

90.

We yawn when we feel somnolent as (a)   and yawing brings extra oxygen to the lungs.

91.

The farmers sometimes loosen the soil because _________________

a)

It helps the root to respire through the air present in the space between soil particles.

b)

It helps plants to survive in high temperature.

92.

Do plants have a respiratory system?

a)

YES

b)

NO

93.

During inhalation diaphragm moves

a)

DOWN

b)

UP

94.

Yeast is a

a)

Multicellular

b)

Carnivore

c)

Anaerobe

d)

Single-celled organism

95.
The air sacs that are covered with capillaries where gas exchange takes place are called as _________
a)
bronchi
b)
lungs
c)
oxygen
d)
alveoli
96.
Which of the following option presents the passage of air from outside to lungs?
a)
larynx, trachea, pharynx, bronchial tubes
b)
bronchial tubes, trachea, pharynx, larynx
c)
pharynx, trachea, larynx, bronchial tubes
d)
pharynx, larynx, trachea, bronchial tubes
97.

Which of the following use spiracles for respiration?

a)

mosquito & cockroach

b)

earthworm & cockroach

c)

fish & grasshopper

d)

only cockroach

98.
State True or False
Gills take in oxygen from the water while lungs take in oxygen from the air.
a)
True
b)
False
99.

Due to accumulation of which acid there is muscle cramp?

a)

Hydrochloric

b)

Lactric

c)

Ammonium

d)

Latic

100.

What gas is MOST LIKELY represented by the arrow labeled X?

a)

carbon dioxide

b)

Oxygen

c)

nitrogen

d)

hydrogen

101.

Label the part shown here .

a)

Lungs

b)

Heart

c)

Gills

d)

Rib Cage

102.

What is the name of the organ which expand and contract while breathing?

a)

Heart

b)

Lungs

c)

Diaphragm

d)

Both b and c

103.

When air is blown from mouth into test tube containing lime water, the lime water turns milky due to presence of?

a)

Oxygen

b)

Carbon dioxide

c)

Nitrogen

d)

Water vapour

104.

In insects, exchange of gases takes place through?

a)

Spiracles

b)

Gills

c)

Lungs

d)

Stomata

105.

During heavy exercise the breathing rate of a person slows down.


a)

TRUE

b)

FALSE

106.

What is the size of a heart?

a)

Closed fist

b)

Hand

c)

Open hand

d)

Closed hand

107.

Which of the following is the main circulatory fluid in our body ?

a)

Plasma

b)

Lymph

c)

Blood

d)

None of these

108.

Why is color of blood red?

a)

myoglobin

b)

globulin

c)

heamoglobin

d)

fibrinogen

109.

What is the function of white blood cells?

a)

transport oxygen

b)

fight against infection

c)

clotting

d)

all the above

110.

The blood vessel which carries blood to the heart

a)

lymphatic vessel

b)

capillaries

c)

veins

d)

arteries

111.

Instrument used to measure the heart beat

a)

Endoscope

b)

Kaleidoscope

c)

Microscope

d)

Stethoscope

112.

Human heart has -----------chambers

a)

3

b)

2

c)

4

d)

1

113.

Aorta carries oxygenated blood to all parts of the body

a)

True

b)

False

c)

No, pulmonary artery

d)

No, pulmonary vein

114.

The fluid part of blood is called-

a)

Haemoglobin

b)

White blood cells

c)

Plasma

115.

Type of device that measures the electrical currents created by the SA and AV nodes?

a)

AED

b)

MRI

c)

ECG

d)

CAT Scan

116.

_____ is the muscular wall that devides the heart length wise-

a)

Septum

b)

Ventricle

c)

Atrium

d)

None

117.

Platelets help in ______________.

a)

exchange of gases

b)

give blood it's colour

c)

blood clotting

d)

fight with infections and diseases

118.

What is the largest artery in the Human Body called?

a)

Pulmonary Artery

b)

Pulmonary Vein

c)

Aorta

d)

Nerves

119.

Blood carries _________ from the lungs to the cells of the body.

a)

Argon

b)

Neon

c)

Carbon Dioxide

d)

None of these

120.

Heart is located in the _____________

a)

Brain Cavity

b)

Chest

c)

Chest Cavity

d)

Beside's Kidney

121.

________ is the blood vessels which carry oxygen rich blood, from the heart, to all parts of the body.

a)

Arteries

b)

Veins

c)

Systole

d)

Xylem

122.
The main function of the circulatory system is 
a)
To give the body structure and support
b)
Excrete waste
c)
transport blood, nutrients, and gases throughout the body
d)
to transport messages from the body to the brain
123.

The blood vessels, having thick elastic walls are called-

a)

Arteries

b)

Veins

c)

Capillaries

d)

Atria

124.
Identify
a)
Left atrium
b)
Right atrium
c)
Left ventricle
d)
Right ventricle
125.
The smallest type of blood vessel is the:
a)
nerve
b)
vein
c)
capillary
d)
artery
126.
Transpiration is
a)
the movement of water through a plant from the roots up the stem
b)
the loss of water from the leaves of a plant by the process of evaporation
c)
the flow of water into plant roots by osmosis from the soil
d)
the process of minerals and sugars moving through plant veins
127.
What is the largest artery in the human body called?
a)
Superior Vena Cava
b)
Aorta
c)
Inferior Vena Cava
d)
Pulmonary Artery
128.

The plants have a transport system called the _______________

a)

Cardiovascular system

b)

Vascular system

c)

Angular system

d)

Excretory system

e)

Transport system

129.

Xylem transports food to different parts of the plant

a)

TRUE

b)

FALSE

130.

The circulatory system is also called as _________

a)

heartery system

b)

Cardiovascular system

c)

Blood pumping system

d)

Nervous system

e)

Blood bank

131.

The right atrium:

a)

Receives Oxygenated blood

b)

Receives Deoxygenated blood

c)

Pumps Oxygenated blood

d)

Pumps Deoxygenated blood

132.

__________ are the structural and functional units of kidneys that filter excess waste, urea and water from the blood

a)

Neurons

b)

Nephrons

c)

Neons

d)

Plasma cells

e)

RNA

133.

Plants have pipe-like vessels to transport food and water from the soil. These vessels are made up of special cells, forming ______

a)

Vascular Tissue

b)

Xylem

c)

Phloem

d)

None of these

134.

The device used to hear the heart beat is called a:

a)

Microscope

b)

Thermometer

c)

Stethoscope

d)

Anemometer

135.

Which English Physician discovered the circulation of blood?

a)

Albert Einstein

b)

Isaac Newton

c)

Nicola Tesla

d)

William Harvey

136.

The filtering unit in the human excretory system is called_______

a)

Nephron

b)

Neuron

c)

Nephridia

d)

Kidneyon

137.

The process of cleaning blood of a person when their kidney damages through a machine is called___________

a)

Ketolysis

b)

Hydrolysis

c)

Dialysis

d)

Photolysis

138.

Birds, insects and ______ excrete uric acid in _________ form.

a)

Rats ; Solid

b)

Lizards ; Semi Solid

c)

Snakes ; Liquid

d)

None of these

139.

______ ______ is the only artery that carries carbon di-oxide rich blood.

a)

Pulmonary artery

b)

Capillary

c)

Pulmonary Vein

d)

Arota

140.

Water is transported in plants through_________

a)

Stomata

b)

Xylem

c)

Phloem

d)

Root hair

141.

1. The rate of heartbeat of a resting person is

a)

68-83

b)

60-72

c)

55-78

d)

72-80

142.

The number of beats per minute is called the ______

a)

Heart beat

b)

Pulse rate

c)

Tissue

d)

All of these

143.

Why plants become wilt?

a)

Less water evaporate from the plants

b)

The plant loss excessive amount of water through transpiration

c)

The stomata of the plants are closed

d)

The weather are cool.

144.

The function of transpiration is to transport _______ and ____________ from the roots to the leaves

a)

water, mineral salts

b)

food, nutrients

c)

water, food

145.

Which of the following indicates the pathway of water through a plant?

a)

root hair cell --> xylem --> stomata

b)

stomata --> root hair cell --> xylem

c)

xylem --> stomata --> root hair cell

146.
How do plants get their energy?
a)
through a reaction called chlorophyll 
b)
by a process called photosynthesis 
c)
by absorbing mineral nutrients from soil 
d)
by eating other organisms 
147.
_______ are tubes that carry nutrients to other parts of the plant. 
a)
stomata 
b)
roots 
c)
xylem 
d)
xylophone 
148.
The plant tissue that carries food materials DOWNWARD from the leaves to the rest of the pant is the ______.
a)
Phloem
b)
Stomata
c)
Chlorophyll
d)
Xylem
149.
Vascular tissue that transports water and minerals UPWARDS from a plant's roots is know as ______.
a)
Chlorophyll
b)
Phloem
c)
Stomata
d)
Xylem
150.
Plant absorbs water through the _________. 
a)
stem
b)
roots 
c)
leaves 
d)
all of the above
151.
Transpiration is
a)
the movement of water through a plant from the roots up the stem
b)
the loss of water from the leaves of a plant by the process of evaporation
c)
the flow of water into plant roots by osmosis from the soil
d)
the process of minerals and sugars moving through plant veins
152.

Root hairs help in absorption of water by

a)

increasing the surface area

b)

decreasing the surface area

c)

holding the plant in the soil

d)

none of the above

153.
A copper penny turning greenish after a few years is an example of ...
a)
Chemical Change
b)
Physical Change
154.
A change in which NEW substances are formed.
a)
Chemical change
b)
Physical change
c)
Casual change
d)
Formal change
155.
Which of the following is NOT an example of chemical change?
a)
sour milk
b)
burning wood
c)
breaking a pencil
d)
rust
156.
Which of the following is NOT an example of a physical change?
a)
crumpled paper
b)
pencil sharpening
c)
shrunken clothing
d)
sour milk
157.
Which of the following IS a physical change?
a)
Getting a haircut
b)
Rusty metal
c)
sour milk
d)
A compound
158.
Is melting butter for popcorn a chemical or physical change?
a)
chemical
b)
physical
159.
Is a rusting bicycle a chemical or physical change?
a)
chemcial
b)
physical
160.
Ripping up paper ...
a)
Chemical Change
b)
Physical Change
161.
A change in phase ...
a)
Chemical Change
b)
Physical Change
162.
Bubbles form when two or more substances are combined ...
a)
Chemical Change
b)
Physical Change
163.
Change in size ...
a)
Chemical Change
b)
Physical Change
164.
An explosion occurs ...
a)
Chemical Change
b)
Physical Change
165.
To go back to the substances original states is not possible or you would need to use chemicals. 
a)
Chemical
b)
Physical
166.
Causes a change in temperature ...
a)
Chemical Reaction
b)
Physical Reaction
167.
Causes a change in odor ...
a)
Chemical Reaction 
b)
Physical Reaction
168.
A change in phase or state of matter ...
a)
Chemical
b)
Physical
169.
A change in the size, shape, or state of matter.
a)
chemical change
b)
physical change
170.
Evidence of Chemical Change.
a)
New Substance 
b)
Size change
c)
State change
d)
Mixture 
171.
Evidence of a physical change.
a)
New substance
b)
Shape Change
c)
Light produced
d)
Gas released.