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CHEMICAL AND PHYSICAL CHANGES

Total questions: 45

Worksheet time: 32mins

Name
Class
Date
1.
What is a change produced in nature?
 
a)
change
b)
situation
c)
experiment
d)
phenomenon
2.
What type of changes or processes cause the chemical composition of substances to change into new substances?
a)
Physical
b)
Chemical
3.
What type of changes or processes cause the chemical composition of substances not to change?.. however, the shape or state of aggregation may change.
a)
Physical
b)
Chemical
4.
Identify the following process:  Bicycles when they move.
a)
Physical change
b)
Chemical change
5.
Identify the following process: When we strike a match.
a)
Physical change
b)
Chemical change
6.
Identify the following process: When we crack an egg.
a)
Physical change
b)
Chemical change
7.
Identify the following process: When we fry an egg.
a)
Physical change
b)
Chemical change
8.
Identify the following process: When light is reflected in water.
a)
Physical change
b)
Chemical change
9.
Identify the following process: When food comes into contact with air.
a)
Physical change
b)
Chemical change
10.
Identify the following process: a solar eclipse.
a)
Physical change
b)
Chemical change
11.
Identify the following process: the formation of a tornado.
a)
Physical change
b)
Chemical change
12.
Identify the following process:  Cooking legumes.
a)
Physical change
b)
Chemical change
13.
Identify the following process:  Frying a steak.
a)
Physical change
b)
Chemical change
14.
Identify the following process:  The formation of a rainbow.
a)
Physical change
b)
Chemical change
15.
A chemical reaction is a process in which one or more substances change into another or others which are different.
a)
TRUE
b)
FALSE
16.
A physical change is a process in which one or more substances change into another or others which are different.
a)
TRUE
b)
FALSE
17.
What are the initial substances in a chemical reaction called?
a)
reagents
b)
products
18.
What are the substances obtained at the end of a chemical reaction called?
a)
reagents
b)
products
19.
What is the speed of this chemical reaction
a)
SLOW
b)
FAST
20.
What is the speed of this chemical reaction
a)
SLOW
b)
FAST
21.
What is the speed of this chemical reaction
a)
SLOW
b)
FAST
22.
What is this ?
a)
a chemical reaction
b)
a mathematical equation
c)
a chemical equation
23.
Abbreviated representation of a chemical reaction using the formulas for the substance involved in the corresponding process.
a)
a chemical reaction
b)
a mathematical equation
c)
a chemical equation
24.
A process in which one or more substances change into another or others which are different.
a)
a chemical reaction
b)
a mathematical equation
c)
a chemical equation
25.
What is this?
a)
carbon
b)
oxygen
c)
carbon dioxide
d)
carbon monoxide
26.
What is this?
a)
carbon
b)
oxygen
c)
carbon dioxide
d)
carbon monoxide
27.
What is this?
a)
carbon
b)
oxygen
c)
carbon dioxide
d)
carbon monoxide
28.
Identify the following environmental pollution
a)
extraction of raw material through mining
b)
agricultural activities using fertilisers and pesticides
c)
use of plastics for dometic and industrial purposes
d)
disposal of industrial chemical residues
29.
Identify the following environmental pollution
a)
extraction of raw material through mining
b)
agricultural activities using fertilisers and pesticides
c)
use of plastics for dometic and industrial purposes
d)
disposal of industrial chemical residues
30.
Identify the following environmental pollution
a)
extraction of raw material through mining
b)
agricultural activities using fertilisers and pesticides
c)
use of plastics for dometic and industrial purposes
d)
disposal of industrial chemical residues
31.
Identify the following environmental pollution
a)
extraction of raw material through mining
b)
agricultural activities using fertilisers and pesticides
c)
use of plastics for dometic and industrial purposes
d)
disposal of industrial chemical residues
32.
Which of the following tells you that a chemical change may have occurred?
a)
Change Shape
b)
Melting
c)
Vaporizing
d)
Change in color
33.
What happens in ALL chemical changes?
a)
Change in state of matter
b)
A new substance is formed
c)
Bubbles are produced
d)
An explosion
34.

Las partículas subatómicas son:

a)

Núcleo y nube electrónica

b)

Neutrones, núcleo y electrones

c)

Neutrones, protones y electrones

d)

Protones, electrones y priones

35.

En el núcleo se encuentran:

a)

Protones y neutrones

b)

Protones y electrones

c)

Electrones y neutrones

d)

Protones, neutrones y electrones

36.

La masa del átomo depende de:

a)

Sus neutrones y electrones

b)

Sus priones y electrones

c)

Sus protones y electrones

d)

Sus protones y neutrones

37.

¿Cuál de las siguientes partículas subatómicas es negativa?

a)

protones

b)

electrones

c)

neutrones

d)

núcleo

38.

Es el único elemento químico que no posee neutrones

a)

Carbono

b)

Hidrógeno

c)

Oxígeno

d)

Nitrógeno

39.

¿Qué partículas tienen carga?

a)

Protón

b)

Neutrón

c)

Electrón

d)

potrón

40.

En un átomo neutro...

a)

tenemos el mismo número de cargas positivas que negativas

b)

no hay cargas

41.

La unidad más pequeña que constituye la materia es:

a)

Átomo

b)

Molécula

c)

Partícula

42.

La estructura de un átomo consta de:

a)

Corteza

b)

Centro

c)

Núcleo

d)

Manto

43.

El protón se encuentra en:

a)

Corteza

b)

Centro

c)

Núcleo

d)

Manto

44.

El electrón se encuentra en:

a)

Corteza

b)

Centro

c)

Núcleo

d)

Manto

45.

Cada átomo de un elemento se diferencia de los otros por tener distinto número de:

a)

Neutrones

b)

Protones

c)

Electrones

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