Atoms Matter And Periodic Table 8th Physical Science Question Preview (ID: 41372)
Midterm Review.
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Which characteristic distinguishes a molecule from an atom?
a) Molecules are positive
b) Molecules are bonded together
c)
d)
The students mixed vinegar and baking soda and bubbles formed and producing a gas. If they measured the mass of the substance at the beginning and had 20g, what would be the mass after the chemical reaction?
a) Less than they had initially because the gas left the flask similar to the process of evaporation
b) More than they had initially because the gas would stay in the flask similar to the process of evaporation
c)
d)
Which of the following best describes a chemical change?
a) Bubbling and fizzing
b) Liquid Evaporated
c) Liquid remained clear
d)
Sarah has two glasses, filled with water and adds 1 ice cube to each glass. In the first glass, the ice cube sunk and in the first glass, floated. What best describes the conclusion?
a) Low densities will float on top of higher density solutions
b) Higher densities will float on top of lower density solutions
c)
d)
You mix two solutions (liquids) together and your left with a solid white substance after all the liquid is gone. What best describes the original substance?
a) Mixture that went through a physical change
b) Mixture that went through a chemical change
c)
d)
What are the properties of Ca, Ba and Li?
a) They are metals
b) They are metalloids
c)
d)
Sugar and Sand is what type of Mixture:
a) Homogeneous
b) Heterogeneous
c)
d)
Sugar and water is what type of mixture:
a) Homogenous
b) Heterogeneous
c)
d)
Rusting is similar to which type of reaction?
a) Melting ice cream
b) Burning wood
c)
d)
As you go from the bottom (solid) to the top (plasma) of the states of matter diagram, what happens to the motion of particles?
a) Energy is added and the molecules move more
b) Energy is removed and the molecules move less
c)
d)
An element (atom) that cannot be separated any further:
a) Pure Substance
b) Compound
c)
d)
When two atoms(elements) combine chemically, they form a :
a) Pure Substance (element)
b) Compound (molecule)
c)
d)
Which state of matter has particles that are tightly packed and moves the slowest?
a) Solid
b) Liquid
c)
d)
Which state of matter shows particles that slide past one another?
a) Liquid
b) Solid
c)
d)
Which is a chemical property of matter?
a) Density
b) Reactivity
c) Melting
d)
Increasing the temperature causes:
a) A Chemical change and particles slow down
b) A physical change and particles to speed up
c)
d)
Which is a not physical property of matter?
a) It was hard
b) It had a mass of 10g
c) It made sparks when dropped
d)
Oil and water mixture:
a) Will mix completely forming a homogeneous mixture
b) Will not mix completely forming a heterogeneous mixture
c) The oil and water has the same density
d)
Salt and water mixture:
a) Has same properties and becomes a homogeneous mixture
b) Has different properties and becomes a heterogeneous mixture
c)
d)
You have 3 different substances. Substance A has a density of 20g/cm3, Substance B has a density of 15g/cm3 and substance C has a density of 10g/cm3. If you placed all 3 into a graduated cylinder, what would be the result from top to bottom?
a) C, B, A
b) A, B, C
c) B, C, A
d)
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