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Science Grade 7

Total questions: 135

Worksheet time: 2hrs 56mins

Name
Class
Date
1.

The process of breaking down of food in the cell with release of energy is called

a)

Digestion

b)

Cellular respiration

c)

Circulation

d)

Excretion

2.
This is referred to as the energy currency of the cell
a)
ADP
b)
ATP
c)
Mitochondria
d)
Nucleus
3.
Anaerobic respiration.....
a)
doesn't require CO2
b)
requires CO2
c)
doesn't require oxygen
d)
requires oxygen
4.
When you breathe, your lungs take in ___ and remove ___. 
a)
air/oxygen
b)
oxygen/carbon dioxide 
c)
carbon dioxide/waste 
d)
waste/air 
5.
What is the organ "x"
a)
Heart
b)
Lungs
c)
Diaphragm
d)
Trachea
6.

When breakdown of glucose occurs with the use of oxygen it is called

a)

aerobic respiration

b)

anaerobic respiration

c)

cellular respiration

d)

anaerobes

7.

Earthworms skin is

a)

moist and slimy

b)

moist and rough

c)

rough and slippery

d)

rough and slimy

8.

In the cells Oxygen is used to break down

a)

glucose into carbon di oxide

b)

Glucose into carbon di oxide and water

c)

water into carbon di oxide

d)

carbon di oxide into water

9.

During heavy exercise when supply of oxygen to our muscles is insufficient food breakdown is by

a)

anaerobic respiration

b)

aerobic respiration

c)

cellular respiration

10.

What is the chemical formula for glucose?

a)

C6H12O6

b)

C12H6O12

c)

C6O12H6

d)

6CH2O

11.

Small openings on the side of the cockroaches body is called as

a)

Trachea

b)

Spiracles

c)

Glucose

d)

None

12.

What are the products of anaerobic respiration in a human cell?

a)

Energy and Lactic Acid

b)

Lactic Acid

c)

Lactic Acid and Carbon Dioxide

d)

Carbon Dioxide and Water

13.

How are the final products of photosynthesis related to cellular respiration?

a)

They are the starting materials for cellular respiration.

b)

They are also the final products for cellular respiration.

c)

They convert chemical energy into light energy.

d)

They convert chemical energy into light energy.

14.

What is the organ used in plants for respiration ?

a)

Gills

b)

Stomata

c)

Lungs

15.

Air tubes in insects are also called ___________.

a)

Trachea

b)

Lungs

16.

1.Oxygen liberated during photosynthesis come from ……………

a)

Water

b)

Carbon dioxide

c)

Glucose

d)

ChlorophyII

17.

Which of the following is not required for photosynthesis?

a)

Sunlight

b)

Oxygen

c)

Water

d)

Carbon dioxid

18.

Which of the following describes the characteristic of a living being?

a)

Nutrition

b)

Excretion

c)

Respiration

d)

All the above

19.

Two different organisms living together and benefitting from each other are known as …………….

a)

Saprophytic

b)

Heterotrophs

c)

Parasitic

d)

Symbionts

20.

An example of an autotrophic plant is ………………..

a)

Mushroom

b)

Mould

c)

Dodder

d)

Neem

21.

An example of Saprophytic plant is …………….

a)

Dodder

b)

Mushroom

c)

Pitcher

d)

Rose

22.

What is A in the given picture ?

(a)  

23.

What is B in the given picture ?

(a)  

24.

What is C in the given picture ?

(a)  

25.

Tiny pores on the surface of leaves are called …………………

a)

ChlorophyII

b)

Stomata

c)

Leaf stalk

d)

Lamina

26.

What are the products of aerobic respiration?

a)

Carbon Dioxide and Energy

b)

Lactic Acid

c)

Water and Carbon Dioxide

d)

Glycogen and Carbon Dioxide

27.

What are the products of anaerobic respiration in a human cell?

a)

Energy and Lactic Acid

b)

Lactic Acid

c)

Lactic Acid and Carbon Dioxide

d)

Carbon Dioxide and Water

28.

What is the chemical formula for glucose?

a)

C6H12O6

b)

C12H6O12

c)

C6O12H6

d)

6CH2O

29.

Where in the body does respiration take place? Select the best answer.

a)

The lungs

b)

The muscles

c)

All cells

d)

The blood

30.
Which organ excretes carbon dioxide?
a)
Lungs
b)
Liver
c)
Heart
d)
Kidney
31.
What is the organ "x"
a)
Heart
b)
Lungs
c)
Diaphragm
d)
Trachea
32.

Yeast is a

a)

Multicellular

b)

Carnivore

c)

Anaerobe

d)

Single-celled organism

33.

Lungs are present in the

a)

Chest Cavity

b)

Nasal cavity

c)

Respiration

d)

Diaphragm

34.

During inhalation diaphragm moves

a)

Down

b)

Left

c)

Right

d)

Up

35.

Small openings on the side of the cockroaches body is called as

a)

Trachea

b)

Spiracles

c)

Glucose

d)

None

36.

Earthworms skin is

a)

Moist and slimy

b)

Moist and rough

c)

Rough and slippery

d)

Rough and slimy

37.

When we inhale air, it passes through our nostrils into the

a)

Nasal cavity

b)

Chest cavity

c)

Tracheae

d)

Spiracles

38.

The respiratory system works with the ________ to help with Cellular Respiration

a)

Nervous system

b)

Circulatory System

c)

Muscular System

d)

Endocrine System

39.

Which of these is a product of cellular respiration?

a)

ATP

b)

Carbon dioxide

c)

Water

d)

All of these are a product of cellular respiration

40.

What is cellular respiration?

a)

The breakdown of glucose to release ATP

b)

The breakdown of glucose to release NADH

c)

The breakdown of glucose to release FADH

d)

The breakdown of glucose to release carbon

41.

Due to accumulation of which acid there is muscle cramp?

a)

Hydrochloric

b)

Lactric

c)

Ammonium

d)

Latic

42.

Breathing is also known as ___ respiration?

a)

Internal

b)

External

c)

Intracellular

d)

Extracellular

43.

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

a)

White blood cells

b)

Red blood cells

c)

Guard cells

d)

Platelets

44.

3. All green plants are ____________________.

a)

Autotrophs

b)

Heterotrophs

c)

Scavengers

d)

Decomposers

45.

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

46.

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

a)

Cell membrane

b)

Cytoplasm

c)

Chloroplast

d)

Croton

47.

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

48.

9. Which of the following is an insectivorous plant?

a)
b)
c)
d)
49.

The plant from which a parasite gets its food is called

a)

Host

b)

Chloroplats

c)

Doddar

d)

Green plants

50.

What does ‘photo ‘ in photosynthesis refer to

a)

Sun

b)

Water

c)

Light

d)

Carbon dioxide

51.

Which of the Following is a Saprophyte

a)

Green plants

b)

Mushroom

c)

Alga

d)

Rhizobium

52.

Stomata are

a)

Tiny pores located underside of Leaves

b)

Photo

c)

Synthesis

d)

Carbon

53.

Rhizobium can convert atmospheric nitrogen into water-soluble compounds

a)

False

b)

True

54.

Carbohydrates,Proteins and Fats are

a)

Nutrition

b)

Food

c)

Nutrients

d)

Autotrophs

55.

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.

56.

chlorophyll captures

a)

carbon dioxide from surroundings

b)

energy of the sunlight

c)

minerals from soil

d)

water from air

57.

Starch is also a

a)

carbohydrate

b)

fats

c)

vitamins

d)

proteins

58.

Rhizobium is an example of

a)

(a) Symbiosis

b)

(b) Parasites

c)

(c) Insectivorous

d)

(d) none of these

59.

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

a)

Starch

b)

Protein

c)

Vitamins

d)

Fats

60.

In lichens ______________ and _____________ live in symbotic association.

a)

Bacteria and fungi

b)

Mushroom and Rhizobium

c)

Cuscuta and mistletoe

d)

Algae and fungi

61.

Leguminous plants are examples of _____________________ association.

a)

autotrophic

b)

saprophytic

c)

symbiotic

d)

parasitic

62.

Centrally located spherical structure in cell is the ___________________

a)

cytoplasm

b)

nucleus

c)

cell membrane

d)

cell wall

63.

Which part of plant is called as food factory?

a)

Fruits

b)

Seeds

c)

Leaves

d)

Flowers

64.

The raw materials used for photosynthesis are

a)

CO2, O2, H2

b)

CO2, Water

c)

N2, Water

d)

O2 , Water

65.

Organisms other than plants which contain Chlorophyll are

a)

Algae

b)

Protozoa

c)

Virus

d)

Fungi

66.

In which of the following modes of heat transfer, do the molecules travel from the hotter part of the body to the colder part?

a)

Conduction

b)

Convection

c)

Radiation

d)

All of the three

67.

Ventilation in rooms is due to

a)

Conduction

b)

Convection

c)

Radiation

d)

All of the three

68.
what is the meaning of conduction
a)
when heat transfers from objects that are not touching
b)
heat rise 
c)
cold fall
d)
when heat transfers from objects that are touching
69.
what kind of heat is happening when the sun heats your body
a)
conduction
b)
convection
c)
density
d)
radiation
70.
The man goes to take the hot pot off the stove with his bare hands.
a)
conduction
b)
convection
c)
radiation
71.
Warm air rises and the cool air sinks.
a)
conduction
b)
convection
c)
radiation
72.
What is the transfer of heat by movement of liquids or gases?
a)
conduction
b)
convection
c)
radiation
73.
You are doing your homework at a desk that is underneath a lamp. You start to feel hotter because of _?_ from the lamp.
a)
conduction
b)
convection
c)
radiation
74.

In heat transfer, heat always flows from the _?_ substance to the _?_ substance.

a)

hotter to colder

b)

colder to hotter

c)

hotter to hotter

d)

colder to colder

75.
Which of the following is the best example of conduction?
a)
A light bulb warming a lampshade
b)
An egg cooking in a frying pan
c)
Water boiling in a pot
d)
Gases circulating in the atmosphere
76.

The candle will slowly heat the metal and transfer the heat directly to the mans hand. This is an example of _?_.

a)

conduction

b)

convection

c)

radiation

77.

The moving of air in the image is an example of _?_.

a)

radiation

b)

convection

c)

conduction

78.

Which material will heat travel through the fastest?

a)

Plastic

b)

Wood

c)

Metal

79.

Which of the following is an example of heat transfer by Conduction?

a)

Burning your fingers on a hot iron.

b)

Heat from a heater warming up your whole house

c)

Standing by a campfire and feeling the heat.

d)

All of the above.

80.

Which of the following is an example of heat transfer by Convection?

a)

Burning your fingers on a hot iron.

b)

Heat from a heater warming up your whole house

c)

Standing by a campfire and feeling the heat.

d)

All of the above.

81.
What is a substance that does NOT conduct heat well?
a)
Conductor
b)
Insulator
c)
Convector
d)
Radiator
82.

If two objects have different temperatures, heat will flow from the warmer object to the cooler one UNTIL ____________

a)

one reaches a temperature of zero

b)

they both have an equal temperature

c)

one runs out of energy

83.
A solar oven uses what kind of heat energy to cook food?
a)
Conduction
b)
convection
c)
radiation
d)
none of the above
84.

The path of the light is

a)

always a straight line

b)

a curved line

c)

a zig-zag line

d)

depends on the medium

85.

Which one shows lateral inversion?

a)

Plane mirror

b)

Convex mirror

c)

Concave mirror

d)

All of these

86.

What type of lens creates the image seen in the eyeglasses?

a)

convex

b)

concave

c)

reflection

d)

plane

87.

A shopkeeper wants to keep an eye on his store in order to prevent shoplifting. What could the shopkeeper hang on the wall in order to see a wider image of his store and his customers?

a)

a convex mirror

b)

a concave mirror

c)

a convex lens

d)

a concave lens

88.
The following is a picture of what type of mirror? 
a)
Convex (diverging) mirror
b)
Concave (converging) mirror
c)
Plane Mirror
d)
Flat Mirror
89.

Type of mirror found in a bathroom...

a)

Plane

b)

Convex

c)

Concave

90.

Type of mirror used as a side mirror on a vehicle to provide a wide angle view...

a)

Plane

b)

Convex

c)

Concave

91.

Type of mirror that can produce a virtual image...

a)

Plane

b)

Convex

c)

Concave

d)

All of the above

92.
A material that reflects or absorbs all of the light that strikes it is called which of the following? 
a)
Transparent
b)
Translucent
c)
Diffuse
d)
Opaque
93.
What does it mean to reflect?
a)
bounce off
b)
bend
c)
refract
d)
energy
94.
Smooth surfaces _______ a lot of light.
a)
reflect
b)
bend
c)
absorb
d)
twist
95.

Does light need a medium to travel?

a)

|Yes

b)

No

96.

Example of a opaque object is -------------------

4 lines
97.
Light is a form of ______________________
a)
energy
b)
inertia
c)
currency
d)
sound
98.
All of the following are sources of light except ______________
a)
the sun
b)
a light bulb
c)
fire
d)
the moon
99.
Light that bounces back has been _______________
a)
transferred
b)
heated up
c)
absorbed
d)
reflected
100.
Which of the following items would most likely reflect light?
a)
tree
b)
mirror
c)
horse
d)
brick wall
101.

Frosted glass is made of glass with an etched surface. How would you describe the glass as light travels through it?

a)

Translucent

b)

Transparent

c)

Opaque

d)

Diffraction

102.

Light waves cannot travel completely through the following?

a)

Air

b)

rock

c)

water

d)

vacuum

103.

Which is not a luminous body?

a)

Sun

b)

Star

c)

Planet

d)

Glow worm

104.

What is an Acid?

a)

Acids are the substances sour in taste and corrosive in nature.

b)

Acids are the substance sour in taste and not corrosive in nature.

c)

Acids are the substances bitter in taste and corrosive in nature.

d)

Acids are the substances sweet in taste and corrosive in nature.

105.

Acids have _____ ions.

a)

H+

b)

OH-

c)

H-

d)

OH+

106.

Vitamin C is actually ______ acid.

a)

Nitric Acid

b)

Ascorbic Acid

c)

Citrus Acid

d)

Tartaric Acid

107.

Chemical name of Lime Water..

a)

Calcium Hydroxide

b)

Calcium Carbonate

c)

Calcium oxide

d)

Calcium bisulphate

108.

Window cleaners generally contains...

a)

Magnesium Hydroxide

b)

Potassium Hydroxide

c)

Ammonium Hydroxide

d)

Sodium Hydroxide

109.

Tamarind , Grapes , Unripe Mangoes , Cherries , Peach etc.. contains

a)

Lactic Acid

b)

Citric Acid

c)

Tartaric Acid

d)

Ascorbic Acid

110.

Soap contains ______.

a)

Potassium Hydroxide

b)

Calcium Hydroxide

c)

Ammonium Hydroxide

d)

Magnesium Hydroxide

111.

Which of these are Natural Indicators?

a)

Turmeric

b)

Red Cabbage

c)

Hibiscus

d)

All of these

112.

Case Study:

There is farming field near your house. The farmer of that field is complaining that the plants and crops are not growing properly.. Farmer is telling that the soil is acidic.. What he should add to the soil to make it suitable for farming?

a)

Quick Lime

b)

Nitric Acid

c)

Hydrochloric Acid

d)

Citric Acid

113.

HCL + NaOH = __________ + _________

a)

NaCl + H02

b)

Na2OH + H20

c)

NaCl + H20

d)

C12H22O11 + H20

114.

Ant bites you.. You are feeling pain... What should be used in order to cure pain?

a)

Formic Solution

b)

Callamine Solution

c)

HCL Solution

d)

Calamine Solution

115.

What are Acid salts?

a)

Salt formed from solution which has Strong Base but weak Acid.

b)

Salt formed from solution which has Strong Acid but weak Base.

c)

Salt formed from solution which has Strong acid and Base.

d)

Salt formed from solution which has weak acid and Base.

116.

_____________ is used as an Antacid.

a)

Magnesium Hydroxide

b)

Sodium Hydroxide

c)

Ammonium Hydroxide

d)

Calcium Hyrdroxide

117.

What does PH value "7" indicates ?

a)

Neutral Solution

b)

Acidic Solution

c)

Basic Solution

d)

Strong Acidic Solution

e)

Strong Basic Solution

118.

Methyl Orange changes color to _______ in Acidic Solution and ________ in Basic Solution.

a)

Red , Yellow

b)

Red , Orange

c)

Yellow , Orange

d)

Orange, Red

119.

Identify base and acid with help of ions present in them.

a)

Purple - Acid ,

Orange - Base

b)

Purple - Base ,

Orange - Acid

c)

Purple - Neutral,

Orange - Base

d)

Purple - Acid ,

Orange - Neutral

120.

Baking Soda is scientifically called as

a)

Sodium HydrogenCarbonate

b)

Sodium Oxide

c)

Sodium Carbonate

d)

Sodium Hydroxide

121.

What color will Red litmus paper will change in Acid?

a)

Blue

b)

Red

c)

No color change

d)

Everything is possible.

122.

Litmus is extraced from __________.

a)

lichens

b)

herbs

c)

cockroach

d)

flower

123.

Riddle:

I am an Acid.. I am helpful in digestion of food particles in our body! If I am too much acidic, you will surely take antacid to neutralize me. Who am I ?

a)

HCL Acid

b)

Sulphuric Acid

c)

Citric Acid

d)

Milk of Magnesia

124.

Which one of the following is an animal product?

a)

Gum

b)

Honey

c)

Catechu

d)

Rubber

125.

Understoreys are formed due to

a)

Different sizes of the crown

b)

Different types of the crown

c)

Different height of the trees.

d)

All of these

126.

Sequence that represents the series of eating and being eaten is called

a)

Food series

b)

Food web

c)

Food hub

d)

Food chain

127.

Which one of the following is a role of forests?

a)

Prevent soil erosion

b)

Provide food, shelter, water and medicines

c)

Prevent flood

d)

All of the above

128.

which of the following serve as green lungs?

a)

green pigment of plants

b)

forests

c)

kitchen garden

d)

green house gases

129.

Ryan visited a forest with his class mates and teacher. His teacher told the students not to make noise as it will disturb

a)

birds

b)

plants

c)

animals

d)

animals and birds

130.

Which among the following is the smallest forest animal?

a)

bison

b)

fox

c)

boar

d)

porcupine

131.

Which of the following has the strongest stem?

a)

tree

b)

herb

c)

shrub

d)

climber

132.

Which of the following is not prepared from the wood obtained from forest?

a)

plywood

b)

paper

c)

thermocol

d)

matchsticks

133.

Which one of the following is odd one out?

a)

teak

b)

sal

c)

porcupine

d)

kachnar

134.

Select the correct food chain given below

a)
b)
c)

None

d)

All

135.

Nutrients are replenished in soil through

a)

roots

b)

water

c)

humus

d)

all of these

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