3rd Quarter Summative Test in Science 8
Quiz by Rhodalia Salamat
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- Q1
How many oxygen atoms are there in a molecule of carbon dioxide, CO2?
Two
One
Four
Three
30sS8MT-IIIa-b-8 - Q2
Compound is a combination of two or more different elements chemically combined together. Which of the following samples of matter is NOT compound?
Water (H2O)
Ozone (O3)
Glucose (C6H12O6)
Sodium Chloride (Na+ Cl-)
30sS8MT-IIIa-b-8 - Q3
Salt solution is consist of 25 grams of Sodium Chloride and 75 mL of water. What extensive property of matter uses the unit of twenty five grams (25 g)?
d. Both A and C
c. Volume
a. Mass
b. Weight
30sS8MT-IIIa-b-8 - Q4
Which statement is true about liquids and gases?
They have definite shape.
They have definite volume.
There are no spaces between gas particles
They take the shape of the container
30sS8MT-IIIa-b-8 - Q5
Which of the following statements is TRUE for solid particles?
The particles are far apart because of strong attractions between them.
The particles are close to each other because of strong attractions between them
The particles are far apart because of weak attractions between them
The particles are close to each other because of weak attractions between them
30sS8MT-IIIa-b-8 - Q6
Which of the following BEST describes the particle model and behavior of matter?
Particles of matter has spaces between them but are not colliding.
Particles of matter has no space between and not colliding.
Matter is made up of tiny particles but has no spaces between them.
Particles of matter has spaces between them and are colliding.
30sS8MT-IIIa-b-8 - Q7
The ice cubes taken out from the freezer melts and turned in to liquid. Which of the following does NOT explains the process?
Ice cubes from the freezer has higher temperature than its surrounding temperature.
Molecules of ice cubes vibrate fast and eventually loosen from fix position and move freely.
As heat transfer continues the kinetic energy of molecules in ice cubes increases.
Ice cubes from the freezer has lower temperature than its surrounding.
30sS8MT-IIIc-d-9 - Q8
Dew and water vapor are products of what physical change?
evaporation-freezing
condensation-evaporation
freezing-evaporation
evaporation-condensation
30sS8MT-IIIc-d-9 - Q9
Which of the following changes does NOT involve absorption of heat?
Melting
Evaporation
Solidification
Sublimation
30sS8MT-IIIc-d-9 - Q10
What phase change is illustrated in the figure on the figure?
Evaporation
Freezing
Condensation
Melting
30sS8MT-IIIc-d-9 - Q11
What physical changes takes place in number 1?
freezing
melting
evaporation
condensation
30sS8MT-IIIc-d-9 - Q12
What physical changes takes place in number 2?
condensation
freezing
melting
evaporation
30sS8MT-IIIc-d-9 - Q13
Which is evidence of chemical change?
Formation of new shape
Drastic change of size
Increase of temperature
Appearance of new substance
30sS8MT-IIIc-d-9 - Q14
In a chemical reaction _______________ .
the atoms of the reactants unbond, rearrange, and then rebond to form the products
new atoms are formed which combine to make the products
the atoms of the reactants always stay together to form the products
some atoms disappear while others multiply to form the products
30sS8MT-IIIc-d-9 - Q15
A chemical change is different than a physical change because in a chemical change _______.
The change can be seen but in a physical change it cannot
Chemicals are used
Molecules do not physically touch
Anew substance is formed and in a physical change no new substance is formed
30sS8MT-IIIc-d-9
