wayground logo

Free Printable Worksheets

Font size

S
M
L
XL
Worksheets

Grade 8 Reviewer

Total questions: 100

Worksheet time: 1hrs 11mins

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.

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

a)

Cell membrane

b)

Cytoplasm

c)

Chloroplast

d)

Croton

3.

Stomata are

a)

Tiny pores located underside of Leaves

b)

Photo

c)

Synthesis

d)

Carbon

4.

Carbohydrates,Proteins and Fats are

a)

Nutrition

b)

Food

c)

Nutrients

d)

Autotrophs

5.

chlorophyll captures

a)

carbon dioxide from surroundings

b)

energy of the sunlight

c)

minerals from soil

d)

water from air

6.

The piercing and tearing teeth is called

a)

incisor

b)

Canine

c)

Pre-molar

d)

Molar

7.

Water from the undigested food is absorbed mainly in the_____.

a)

Stomach

b)

Food Pipe

c)

Small Intestine

d)

Large Intestine

8.

The ___ helps in mixing saliva with food.

a)

Heart

b)

Stomach

c)

Nose

d)

Tongue

9.

The inner walls of the stomach secrete _________.

a)

Mucus & hydrochloric acid

b)

Bile

c)

Lime

d)

Salt

10.

Liver secrets _____.

a)

Acid

b)

Bile Juice

c)

Base

d)

Water

11.

What is the process by which plants synthesize carbohydrates from raw materials using energy from light?

a)

Transpiration

b)

Respiration

c)

Photosynthesis

d)

Fermentation

12.

What is the chemical equation for photosynthesis?

a)

CO2 + H2O -> C6H12O6 + O2

b)

C6H12O6 + O2 -> CO2 + H2O

c)

H2O + O2 -> CO2 + C6H12O6

d)

CO2 + O2 -> H2O + C6H12O6

13.

Which factor is necessary for photosynthesis according to the experiments mentioned?

a)

Light

b)

Temperature

c)

Carbon Dioxide

d)

Oxygen

14.

Explain the structure of a leaf and its role in photosynthesis.

a)

The structure of a leaf includes the stem and roots. The role of a leaf in photosynthesis is to absorb water and minerals from the soil.

b)

The structure of a leaf includes the petals and sepals. The role of a leaf in photosynthesis is to attract pollinators to the plant.

c)

The structure of a leaf includes the upper and lower epidermis, mesophyll tissue, veins, and stomata. The role of a leaf in photosynthesis is to absorb light energy, convert it into chemical energy, and produce glucose for the plant.

d)

The structure of a leaf includes the thorns and tendrils. The role of a leaf in photosynthesis is to provide support for the plant.

15.

How can the presence of starch in a leaf be investigated?

a)

Observing the color of the leaf under UV light

b)

Measuring the temperature of the leaf

c)

Performing a starch test using iodine solution

d)

Counting the number of veins in the leaf

16.

What are the pores under a leaf that allow for gas exchange calld?

a)

Stomata

b)

Root Hair Cell

c)

Palisade Cell

d)

Guard Cells

17.

Identify structure 1 in the diagram.

a)

Spongy mesophyll

b)

Transport tissues

c)

Waxy cuticle

d)

Palisade mesophyll

18.
What are the products of photosynthesis?
a)
water and carbon dioxide
b)
oxygen and glucose
c)
oxygen and carbon dioxide
d)
oxygen and water
19.

The function of the waxy cuticle is to ...

a)

to prevent rain entering the leaf

b)

reduce water loss by evaporation

c)

absorb more light

d)

to reflect sunlight

20.

In which layer does most photosynthesis occur ?

a)

A

b)

B

c)

E

21.

The diagram shows the apparatus used in the

Ingenhousz experiment which aims to measure the

rate of oxygen produced during photosynthesis.

Which two factors must be kept constant during

this investigation?

a)

The volume of water in the beaker and the height of the measuring cylinder.

b)

The type of aquatic plant and the amount of gas in the measuring cylinder.

c)

The size of the aquatic plant and the duration of exposure to light.

d)

The size and type of aquatic plant and the duration of exposure to light

22.

What are the 6 major nutrients?

a)

Fruits
Vegetables

Dairy

Grains

Proteins

Water

b)

Protein

Carbohydrates

Vitamins

Minerals

Water

Fats

c)

Meats

Bread

Oranges

Milk

Water

Avocado

d)

Calcium

Vitamin A

Niacin

Unsaturated

Saturated

Vitamin K

23.

Proteins help to build, repair and maintain body cells and tissues

a)

True

b)

False

24.

Which essential nutrient is the main source of energy?

a)

Vitamins

b)

Protein

c)

Carbohydrate

d)

Water

25.

What is a balanced diet?

a)

A diet that contains only carbohydrates

b)

A diet that contains all the needed nutrients in correct amounts

c)

A diet that contains only proteins

d)

A diet that contains only fats

26.

Which reagent (chemical) is used to test for starch ?

a)

Iodine Solution

b)

Benedict's Solution

c)

Biuret Solution

d)

Ethanol

27.

Which reagent (chemical) is used to test for lipids (fats & oils) ?

a)

Iodine Solution

b)

Benedict's Solution

c)

Biuret Solution

d)

Ethanol

28.

Which reagent (chemical) is used to test for sugar ?

a)

Iodine Solution

b)

Benedict's Solution

c)

Biuret Solution

d)

Ethanol

29.

Which reagent (chemical) is used to test for protein ?

a)

Iodine Solution

b)

Benedict's Solution

c)

Biuret Solution

d)

Ethanol

30.

Which food test involves heating the solution in a water bath ?

a)

Test for starch

b)

Test for sugar

c)

Test for protein

d)

Test for lipids

31.

Which colour indicates a NEGATIVE result for starch ?

a)

Pale blue

b)

Brown

c)

Milky white

d)

Colourless

32.

Which colour indicates a NEGATIVE result for sugar ?

a)

Pale blue

b)

Red

c)

Lilac

d)

Milky white

33.

Which colour indicates a POSITIVE result for starch ?

a)

Brown

b)

Blue/black

c)

Yellow

d)

Red

34.

Which colour indicates a POSITIVE result for sugar ?

a)

Red

b)

Pale blue

c)

Lilac

d)

Milky White

35.

Which colour indicates a POSITIVE result for protein ?

a)

Blue/black

b)

Green

c)

Brown

d)

Lilac

36.

Which colour indicates a POSITIVE result for lipids (fats & oils) ?

a)

Colourless

b)

Milky white

c)

Yellow

d)

Green

37.

What is the function of the teeth and tongue?

a)

chemical digestion

b)

mechanical disgestion

c)

break down food

d)

they only chew food

38.

Which organ churns food and uses acid and enzymes to break down food?

a)

mouth

b)

stomach

c)

pancreas

d)

esophagus

39.

Which of the following is considered to be an accessory organ of digestion?

a)

mouth

b)

pancreas

c)

stomach

d)

small intestine

40.

Nutrients from digested food are absorbed in which digestive organ?

a)

small intestine

b)

large intestine

c)

stomach

d)

gallbladder

41.

Which type of tooth is designed to grind food

a)

incisor

b)

canine

c)

molar

d)

pre molar

42.

The large intestine's major role is to ....

a)

absorb water from the undigested food

b)

break down food

c)

exhale carbon dioxide

d)

absorb nutrients from the food

43.

The picture bellow shows permanent teeth set. What is the " star" teeth ?

a)

molar teeth

b)

canine teeth

c)

incisor teeth

d)

pre molar teeth

44.

Jenna doctor told her she was Anemic what nutrients is she lacking in her diet

a)

Carbohydrate

b)

Calcium

c)

Protein

d)

Iron

45.
Enzymes and acids are examples of 
a)
mechanical digestion
b)
chemical digestion
46.

What enzyme is found in saliva that starts digesting carbohydrates?

a)

amylase

b)

chyme

c)

pepsin

d)

bile

47.

What are the rhythmic muscular contractions of your esophagus called to help food move along?

a)

swallowing

b)

peristalsis

c)

inertia contractions

d)

paralysis

48.

The enzyme ___________ digest fat into fatty acid and glycerol

a)

Lipase

b)

Amylase

c)

Protase

d)

Hydrolase

49.

What might happen if your large intestine did not absorb water from chyme?

a)

You couldn't digest food.

b)

You wouldn't be able to go to the bathroom.

c)

You would become dehydrated.

d)

Solid waste would not be able to move throughout the digestive system

50.

Hydrochloric acid is a caustic chemical that can burn your skin- and yet it exists in your stomach. How can this be?

a)

Your small intestines absorb all the hydrochloric acid

b)

The food in your stomach absorbs all the acid

c)

Your stomach lining protects you against burns

d)

The hydrochloric acid in your stomach is different from the hydrochloric acid you would find in a chemistry lab

51.

organ that stores bile

a)

gall bladder

b)

large intestine

c)

liver

52.

Four test-tubes are set up as shown in the diagram and left in full sunlight. After several hours, which test-tube contains the most dissolved oxygen?

a)
b)
c)
d)
53.

Which product of photosynthesis moves out of a green leaf through its stomata?

a)

carbon dioxide

b)

glucose

c)

oxygen

d)

water

54.

Which two substances are needed for photosynthesis?

a)

Carbon dioxide

b)

Oxygen

c)

Water

d)

Glucose

55.

The diagram shows a palisade cell. In which region glucose is produced?

a)

A

b)

B

c)

C

d)

D

56.

The diagram shows a section through a leaf. Which cell type absorbs the most carbon dioxide during the day?

a)

A

b)

B

c)

C

d)

D

57.

An atom is too small to see

a)

True

b)

False

58.

An atom is made up of three basic parts which are Protons, Neutrons, and Electrons.

a)

True

b)

False

59.

The center of an atom is called

a)

Nucleus

b)

Electron

c)

Element

60.

Protons and Neutrons are located in the center/nucleus of an atom

a)

True

b)

False

61.

Protons have a + charge

a)

True

b)

False

62.

Name the 3 states of Matter

a)

Solid, Liquid and Gas

b)

Solid, Water, and Gas

c)

Liquid, Electrons and Gas

63.

All matter is made of particles

a)

True

b)

False

64.

Particles are always moving.

a)

True

b)

False

65.

Which image shows particles in a solid?

a)
b)
c)
66.

Which image shows particles in a liquid?

a)
b)
c)
67.

Which image shows particles in a gas?

a)
b)
c)
68.

Which of the following is a correct description for solids?

a)

Particles are closely packed and do not move.

b)

Particles are closely packed and vibrate.

c)

Particles can move around each other.

69.

Which of the following statements about the particle of a gas is true?

a)

The particles of a gas vibrate and are packed closely together.

b)

The particles of a gas are far apart and move in all directions.

c)

The particles of a gas do not move.

70.
Which state of matter has molecules that slide past each other but stay close together? They do not form a regular pattern.
a)
solid
b)
liquid
c)
gas
71.

As particles are exposed to warmer temperatures they __________

a)

speed up and break apart

b)

slow down and break apart

c)

stay the same

d)

vibrate but stay together

72.

As particles are exposed to colder temperatures they _____

a)

speed up and get stronger bonds

b)

slow down and get stronger bonds

c)

stay the same

d)

become ions

73.

When we add heat to particles, we are adding:

a)

Electricity

b)

Energy

c)

More Particles

74.

Something that goes from solid to liquid is...

a)

Evaporation

b)

Melting

c)

Freezing

d)

Sublimation

75.

When something goes from gas to liquid, it is called...

a)

Evaporation

b)

Condensation

c)

Deposition

d)

Freezing

76.

Something that goes from liquid to gas is...

a)

Evaporation

b)

Melting

c)

Freezing

d)

Sublimation

77.
An inflated balloon is placed in a refrigerator. Which statement describes the movement of the gas particles in the balloon?
a)
The particles move more slowly and become closer together.
b)
The particles move more slowly and become further apart.
c)
The particles move faster and become closer together.
d)
The particles move faster and become further apart. 
78.
A solid compound X was heated steadily for 20 minutes. The graph below shows the change in temperature of X with time. At what temperature did X melt?  
a)
20°C
b)
40°C
c)
90°C
d)
100°C
79.
A solid compound X was heated steadily for 20 minutes. The graph below shows the change in temperature of X with time. What is the boiling point of X?
a)
20°C
b)
40°C
c)
90°C
d)
100°C
80.
What is/are the physical state(s) of X at 100°C?
a)
Solid
b)
Solid and liquid
c)
Gas
d)
Liquid and gas
81.
At what temperature does matter change phases from a solid to a liquid?
a)
Melting Point
b)
Boiling Point
c)
100 degrees Celsius
d)
Condensation Point
82.
Which point of the particle theory is depicted by this picture?
a)
all matter is made of particles
b)
particles are in constant, random motion
c)
particles speed up as heat is added and slow down as heat is removed
d)
different substances are made of different types of particles
83.

What happens to the pressure of a gas when its temperature is increased?

a)

Increases

b)

Decreases

c)

Remains the same

d)

Cannot be determined

84.

What causes the pressure of a gas to increase?

a)

Decreased temperature

b)

Increased volume

c)

Decreased force

d)

Increased frequency of collisions

85.
In what direction(s) does air exert pressure?
a)
everywhere
b)
no where
c)
there is no pressure
d)
downward
86.
When particles move from areas of high concentration to areas less concentrated, this has taken place.
a)
diffusion
b)
mitosis
c)
endocytosis
d)
photosynthesis
87.
Diffusion is the movement of molecules from an area of _____ concentration to an ______ concentration
a)
High, low
b)
Low, high
c)
Low, low,
d)
High, high
88.

Gas pressure is caused by

a)

Gas molecules heating up

b)

Gas molecules reacting with other gas molecules

c)

Gas molecules hitting the walls of a container

d)

Gas molecules hitting other gas molecules

89.
The symbol for beryllium is
a)
B
b)
b
c)
Be
d)
BE
90.

Used for making glasswares

a)
B
b)

Be

c)

Ba

d)

Ca

91.

Used to make batteries

a)

Cl

b)
Li
c)

C

d)

K

92.
The symbol for hydrogen is
a)
H
b)
h
c)
He
d)
Hy
93.

Used as fuel for airships

a)
H
b)
He
c)

N

d)

O

94.

Found in the lead/grapihite of your pencil.

a)
C
b)
Ca
c)

Cl

d)

O

95.

Used to make toothpaste

a)
F
b)

Cl

c)

Na

d)

C

96.

Used to make springs for mattress.

a)

Be

b)

Li

c)

H

d)

Mg

97.

Used for advertisement lights and signage.

a)
N
b)
Ne
c)

Na

d)

Cl

98.

Used in light bulbs as filaments

a)

Al

b)

Ar

c)

Be

d)

Li

99.

It is needed for strong bones.

a)
C
b)
Cl
c)

Cr

d)
Ca
100.

All of the following are leaf adaptations fto perform its function except for.

a)

It has a leaf stalk to capture more sunlight.

b)

It has microscopic hair cells that supply water for photosynthesis.

c)

It has veins to supply water, minerals and glucose for photosynthesis.

d)

It is thin to trap sunlight easily.

Similar Resources on Wayground

8th Grade Science STAAR Review 2022

100 questions

8th Grade Science STAAR Review 2022

quiz

Worksheet

•

6th - 8th Grade

Earth Space Science Review

100 questions

Earth Space Science Review

quiz

Worksheet

•

6th - 8th Grade

Sains darjah 2

100 questions

Sains darjah 2

quiz

Worksheet

•

1st - 10th Grade

Topic 5 Study Material Ecosystems

100 questions

Topic 5 Study Material Ecosystems

quiz

Worksheet

•

7th Grade

Earth Science EOC Review

96 questions

Earth Science EOC Review

quiz

Worksheet

•

6th - 8th Grade

PMA 2 Review

100 questions

PMA 2 Review

quiz

Worksheet

•

8th Grade

Heat Pump Prep Test

100 questions

Heat Pump Prep Test

quiz

Worksheet

•

1st Grade - Professio...

Ecology Test 1 Review

95 questions

Ecology Test 1 Review

quiz

Worksheet

•

6th - 8th Grade