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Science 7 for class study in Cambridge (Science cho lớp 7 CAM)

Total questions: 59

Worksheet time: 39mins

Name
Class
Date
1.

The lungs bring ______ into the body, and eliminates _____ from the body.

a)

Carbon monoxide, oxygen

b)

Oxygen , Carbon Monoxide

2.

Which of the following structures is NOT part of the respiratory system?

a)

Bronchus

b)

Trachea

c)

Heart

3.

What organ in the circulatory system is responsible for pumping the blood throughout the body?

a)

Heart

b)

Blood vessels

c)

Blood

4.

Which type of circuit/ circulation is responsible for the movement of blood from the heart to the rest of the body, excluding the lungs?

a)

Pulmonary Circulation

b)

Coronary Circulation

c)

Systemic Circulation

5.

Which structures of the heart receive blood from the lower and upper parts of the body?

a)

Arteries

b)

Veins

c)

Atria

6.

The Circulatory System is also termed as ___________________

a)

Respiratory System

b)

Cardiovascular System

c)

Digestive System

7.

The Circulatory System is comprised of the following except:

a)

Heart

b)

Blood

c)

Lungs

d)

Blood Vessels

8.

What is the term for the outermost electrons in an atom that are involved in chemical bonding?

a)

Protons

b)

electrons

c)

Neutrons

d)

Valence electrons

9.

what is the chemical symbol of gold?

a)

Ag

b)

Au

c)

Ca

d)

Mg

10.

Which of the following characteristics are typically associated with metals?

a)

Brittle and non- conductive

b)

low melting point and low density

c)

Malleable and ductile

d)

Insoluble in water and gas at room temeperature

11.

what is the chemical formula for salt?

a)

NaCO3

b)

Nacl

c)

NaOH

d)

NA2O

12.

what is the atomic number of Nitrogen, considering that it is makes up about 78% of Earth's atmosphere and has 7 protons and electrons ?

a)

5

b)

7

c)

17

d)

8

13.

When Be, a metal with 2 valencce electrons, lose 2 electrons, what is the resulting chemical formula

a)

Be-

b)

Be2+

c)

Be

d)

Be+

14.

what is chemical fomula of glucose?

a)

C6H12O6

b)

C12H22011

c)

NaCl

d)

NaHCO3

15.

How is the arrangement of valence electrons in the periodic table?

a)

by column

b)

by line

c)

by period

d)

by row

16.

what is the maximum number of electronss in the third energy level?

a)

6

b)

18

c)

32

d)

8

17.

Who presented an atomic model with electrons in fixed orbits around the nucleus?

a)

Erwin Schrodinger

b)

J.J. Thomson

c)

Neils Bohr

d)

Werner Heienberg

18.

An atom that is electrically charged by losing or gaining electrons

a)

neutral atom

b)

ion

c)

cation

d)

anion

19.

The number of protons & neutrons in an atom

a)

atomic mass

b)

atomic number

20.

Atoms of the same element that have different atomic masses.

a)

ion

b)

atomic mass

c)

isotopes

21.

The smallest part of matter which is made of subatomic particles.

a)

atom

b)

element

c)

matter

d)

particle

22.

An atom in which the number of protons and electrons are equal

a)

cation

b)

anion

c)

neutral atom

d)

ion

23.

This number is constant for an element

a)

# of neutrons

b)

# of electrons

c)

# of protons

d)

atomic mass #

24.

Location of protons and neutrons

a)

nucleus

b)

orbitals

25.

An atom that has a negative charge and has gained electrons

a)

isotope

b)

cation

c)

neutral atom

d)

anion

26.

A subatomic particle that has a negative charge and no mass

a)

proton

b)

electron

c)

neutron

27.
What does the 6 represent?
a)
atomic mass
b)
atomic number
c)
element name
d)
chemical symbol 
28.
What does 12.011 represent?
a)
atomic mass
b)
atomic number
c)
element name
d)
chemical symbol 
29.
These are found on the Periodic Table.
a)
Compounds
b)
Elements
c)
Mixtures
30.

the basic structural unit of matter

a)

atom

b)

matter

c)

element

d)

nucleus

31.

a collection of atoms of one type that cannot be broken down into simpler substances by ordinary chemical or physical means

a)

element

b)

subatomic particle

c)

electron

d)

matter

32.
How many neutrons are in a Gold atom?
a)
79
b)
196
c)
118
d)
275
33.
How many neutrons are in a Gold atom?
a)
79
b)
196
c)
118
d)
275
34.
How many protons are in this element?
a)
79
b)
196
c)
117
d)
Cannot be determined
35.
What is the atomic mass of Neon?
a)
10
b)
30
c)
10.18
d)
20.18
36.
The atomic number of this pictured element is
a)
28
b)
58.6934
c)
Ni
d)
Nickel
37.
The atomic number of this pictured element is
a)
28
b)
58.6934
c)
Ni
d)
Nickel
38.

the mass of an atom, calculated by adding the number of protons and neutrons in the nucleus of the atom

a)

element name

b)

element symbol

c)

atomic number

d)

atomic mass

39.

a unique number for each element that equals the number of protons in an atom of that element

a)

element name

b)

element symbol

c)

atomic number

d)

atomic mass

40.

a unique number for each element that equals the number of protons in an atom of that element

a)

element name

b)

element symbol

c)

atomic number

d)

atomic mass

41.

a unique number for each element that equals the number of protons in an atom of that element

a)

element name

b)

element symbol

c)

atomic number

d)

atomic mass

42.

a unique number for each element that equals the number of protons in an atom of that element

a)

element name

b)

element symbol

c)

atomic number

d)

atomic mass

43.
1. Cells that help in blood clotting
a)
Red blood cell
b)
White blood cell
c)
Blood platelets
d)
Plasma
44.

What is a solvent

a)

A liquid that will dissolve a solid solute

b)

Another word for solution

c)

A thing that make drinks change colour

d)

Usually the solid about to be dissolved

45.
If I dissolve sugar in water, what is the solute?
a)
Water
b)
Hydrogen
c)
Sugar
d)
Carbon
46.
If I dissolve sugar in water, what is the solute?
a)
Water
b)
Hydrogen
c)
Sugar
d)
Carbon
47.
When a solvent contains as much of the solute as it can hold, the solution is said to be
a)
supersaturated
b)
diluted
c)
saturated
d)
unsaturated
48.
__________ are made up of solutes and solvents.
a)
Solutions
b)
Suspensions
c)
Heterogeneous Mixtures
d)
Pure Substances
49.

This essential gas is important so that we can breath.

a)

HYDROGEN

b)

NITROGEN

c)

CARBON DIOXIDE

d)

OXYGEN

50.

What is the nearest planet to the sun?

a)

Mercury

b)

Venus

c)

Earth

d)

Mars

51.

What is the largest planet in the solar system?

a)

Mars

b)

Saturn

c)

Jupiter

d)

Uranus

52.

What is the hottest planet in the solar system.?

a)

Venus

b)

Sun

c)

Earth

d)

Mercury

53.

What part of the plant conducts photosyntehsis?

a)

Leaves

b)

Stem

c)

Fruits

d)

Trunk

54.

What is the largest known land animal?

a)

Monkey

b)

Giraffe

c)

Elephant

d)

Lion

55.

What is the largest known animal?

a)

Elephant

b)

Sea Lion

c)

Dolphin

d)

Blue whale

56.

Animals that eat both plants and meat are called what?

a)

Carnivores

b)

Herbivores

c)

Omnivores

57.

An example of a natural light source is

a)

the moon

b)

a candle

c)

the sun

d)

a torch

58.

The moon _________ the sun's light.

a)

reflects

b)

absorbs

c)

turns on

d)

dims

59.

Light travels in

a)

zig zags

b)

waves

c)

straight lines

d)

circles

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