In a science lab, Andrea performed the separation of a mixture. She recorded her observations
using the following drawing
The mixture was separated using magnetization, because it is formed by
A. only by a solid that lacks magnetizing properties
B.
only by a solid that has magnetic properties
C.
By two solids that are attracted by a magnet
D.
By two solids, where one of them is attracted by a magnet.
In the image, different states of matter are shown, such as solid, liquid and gaseous. Each one has its
particles in a different way, from which it is possible to say that:
A.
B.
C.
D.
A. The liquid state the particles are very separate.
b. In the solid state the particles are not organized.
c. In the Liquid state the particles are not organized.
d. In the solid state very separated particles.
3. Look at the following image.From the water cycle represented in the drawing it is concluded that the
clouds:
A. are formed by the evaporation of liquid water.
B. produce water by rain.
C. follow the entire path of the arrows in the cycle.
D. form ice by evaporation.
4, Andres traveled with his parents and bought an ice cream in each of the following environments:(look the
following picture) Andres can say that the ice cream will melt more slowly in the environments
A. 1 y 4.
B. B. 2 and 3.
C. C. 1 and 3.
D. D. 2 and 4.
5. The following graph shows the process in which a substance, which is initially in a solid state, is heated,
according to that, we could find that same substance in a gaseous state in :
A.
B.
C.
D.
B–C
C–D
D–E
E–F
The teacher Ximena in a laboratory designed for fifth grade students
wants to make ice cream with their students for it asks for the following
materials, water, green dye, lemon, sugar. After mixing all the ingredients
were taken to the freezer, since changing the liquid water that is in the
refrigerator passes to the solid state forming ice, it can be said that it is
necessary that:
a.
Increase the temperature of the ice because this is the temperature of the
refrigerator.
b.
The vapor retains its same shape because otherwise it does not change state.
c.
Decrease the temperature of the liquid because otherwise it does not change
state
d.
A new substance is formed because as the temperature decreases, the water
reacts
ANSWER QUESTIONS 7 AND 8 ACCORDING TO THE FOLLOWING INFORMATION . THE
FOLLOWING DRAWINGS REPRESENTS SOME METHODS OF SEPARATION OF MIXTURES THAT
CHILDREN USE IN CLASS.
The following table shows the properties of some materials that are used to prepare mixtures
7. According to the above information, screening is an appropriate method to separate a
mixture of
a.stones and sand
b. Salt and sand
C. Water and oil
d. Water and salt
8. Ana prepared a mixture of sand with iron filings, but her teacher asked her to separate these
two substances again. The most appropriate procedure is to use Ana to separate the mixture is:
a.Evaporation
b. filtration
C. decanting
d. Magnetism
9.When sifting a mixture containing water, sugar, stones and oil, it is possible that:
a.The water and oil pass the sieve and the sugar and stones are retained
b. Water pass through the sieve water, sugar and oil are retained the stones
c. Water pass the sieve and the oil, sugar and stones are retained
d. All substances pass through the sieve and there is no substance left
. Luis prepared a mixture with water, alcohol, salt and stones (cup 1). Then I stir and separate
the mixture with the assembly shown in the following drawing
10. According to the separation method Luis used, it is correct to state that container 2 contains
a. Water and stones, because alcohol and salt remain in the filter
b. Alcohol and water, because only liquids can pass through the filter
C. Salt and water, because alcohol and stones remain in the filter
d. Water, salt and alcohol, because only the stones are retained in the filter
11. . Peter placed two containers with fire water, but one of them had no lid, let the liquid boil
for a few minutes and then put out the fire. When he looked at the water level, he realized that
the container without a lid had less water than the container with a lid. This happens because
a.In the container without a lid the water disappeared
b. In the container without lid the water condensed
C. The container with lid produced more evaporation
d. In the container with a lid the water condenses on the lid.
12 Steel is a material containing the elements iron and carbon. Two different samples
of steel have different amounts of these elements, but both have uniform composition.
Using the diagram above, how would you classify the steel?
Steel is a material containing the elements iron and carbon. Two different samples of steel have
A. As a homogeneous mixture, because it is made up of different elements and is uniform.
B. As a pure substance, because it has uniform composition and is a single compound.
C. As a heterogeneous mixture, because it is made up of different elements.
D. As a pure substance, because different samples have different composition.
. Heat is a manifestation of energy that always flows from a higher temperature zone to a lower
temperature zone. The following drawing shows the particles of a liquid in a closed container:
13. The liquid is heated until it becomes a vapor. The correct representation of the particles inside
the container is shown in
A
B
C
D
14. A study was conducted on the time it takes for 100 grams of ice to melt once it is taken out of
the refrigerator. The study was carried out in the city of Cartagena, and concluded: "In any part of
the country, ice melts completely after 90 minutes of being taken out of the refrigerator". The
conclusion of the study is
A. false, because the study was carried out in only one city.
B. true, because all cities in the country are hot.
C. false, because depending on the brand of refrigerator, ice freezes more and takes longer to
melt.
D. true, because ice takes a long time to melt.
5. John poured three substances into a container, mixed them and after one hour at rest observed
some characteristics of the substances and recorded them in his notebook. According to the
characteristics recorded in Juan's notebook, the drawing that best represents the mixture after
one hour is
According to the characteristics recorded in Juan's notebook, the drawing that best represents
the mixture after one hour is
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