Font size
WorksheetsScience's Diagnostic Test 7°
Total questions: 15
Worksheet time: 4hrs 45mins
A sample arrives at a laboratory to be analyzed. After subjecting the sample to different methods for separating mixtures, it is concluded that the substance cannot be separated into other components. Based on this, it is correct to affirm that substance is:
Homogeneous mixture
Pure substance
Heterogeneous mixture
None of the above
A pure substance is one that is composed of only one type of particle (atom or molecule) and that its proportions are always constant. Based on this, from the following examples choose the one that is NOT a pure substance:
Air
Water
Baking Soda
Salt
Salt has been present in the diet of humans since ancient times, it has also been used to preserve food and bodies. The sea is a source for obtaining salt, and since seawater is a mixture made up of H2O, NaCl and many other compounds, it can be separated using the methods studied in class. Based on the image, explain the most used method to obtain sea salt:
Atoms bond together to achieve stability and meet the octet rule (have 8 electrons in the valence shell), an exception to this rule is hydrogen which meet duet rule. Based on this, which of the following images represents a stable molecule?
A
B
C
D
Atomic theories advanced as subatomic particles and their location in the atom were discovered. According to Thompson (1904), the atom consisted of a sphere of positive charge with embedded electrons and later Rutherford proposes his atomic model in which the positive charge is concentrated in the center of the atom and the electrons rotate around it. Based on the above, it is correct to say that Rutherford discovered:
Neutrons
Electrons
Protons
All subatomic particles
Choose the correct affirmation:
The atom is a representation of Bohr´s atomic model, its atomic number is 8, the mass number is 16 and it´s neutral
The atom is a representation of Dalton´s atomic model, its atomic number is 16, the mass number is 8 and it´s a positive-charged
The atom is a representation of Bohr´s atomic model, its atomic number is 8, the mass number is 16 and it´s a negative-charged ion.
When the digestive process is over, our bodies transform energy in the following way:
From chemical to kinetic
From electrical to light
From potential to kinetic
From wind to electrical
Which one would go faster?
The person of letter B because the way she is riding the bike allows her to go faster breaking easier the air resistant
The person of the letter A, because the position of the hands and of his body help to reduce the air resistant, allowing to go faster through the air as easily as possible
None of the above
According to the picture:
The object is falling down
The object is being lifted by a machine
The object is being pulled up by a rope
The object is at rest
A box is being transported downwards in a mechanical conveyor belt. The free body diagram that best describe this situation is:
A
B
C
D
When you are playing soccer and you kick the ball very hard you feel pain in your foot. This happens because:
The same force that you apply on the ball is exercised on you by Newton ́s first law
The same force that you apply on the ball is exercised on you by Newton ́s second law
The same force that you apply on the ball is exercised on you by Newton ́s third law
The ball stays in inertial motion by Newton ́s first law
According to this image which of the cells depicted in the line graph are most likely cancerous?
A
B
C
D
Take a look of the changes in the cells shape. Based on this, it is possible to conclude that they were on what type of solution:
Hypertonic
Hypotonic
Isotonic
Could be any type of solution
Organize the phases of cell cycle:
INTERPHASE (G1, S, G2) and MITOSIS (prophase, metaphase, anaphase, telophase)
MITOSIS (prophase, anaphase, metaphase, telophase) and INTERPHASE (G1, S, G2)
INTERPHASE (prophase, metaphase, anaphase, telophase) and MITOSIS (G1, S, G2)
MITOSIS (G1, S, G2) and INTERPHASE (prophase, metaphase, anaphase, telophase)
Name all the structures labeled above:
1 nasal cavity, 2 pharynx, 3 larynx, 4 trachea, 5 bronchi, 6 bronchioles, 7 alveoli, 8 diaphragm, 9 lungs
1 alveoli, 2 diaphragm, 3 nasal cavity, 4 bronchioles, 5 bronchi, 6 wind pipe, 7 pharynx, 8 larynx, 9 lungs
1 alveoli, 2 diaphragm, 3 nasal cavity, 4 bronchi, 5 bronchus, 6 trachea, 7 pharynx, 8 larynx, 9 lungs
1 alveoli, 2 diaphragm, 3 nasal cavity, 4 bronchi, 5 bronchus, 6 trachea, 7 larynx, 8 pharynx, 9 lungs
