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Atoms Matter And Periodic Table 8th Physical Science
Test Description: Midterm Review
Instructions: Answer all questions to get your test result.
1) Which characteristic distinguishes a molecule from an atom?
A
Molecules are bonded together
B
Molecules are positive
2) 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
More than they had initially because the gas would stay in the flask similar to the process of evaporation
B
Less than they had initially because the gas left the flask similar to the process of evaporation
3) Which of the following best describes a chemical change?
A
Bubbling and fizzing
B
Liquid Evaporated
C
Liquid remained clear
4) 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
5) 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
6) What are the properties of Ca, Ba and Li?
A
They are metalloids
B
They are metals
7) Sugar and Sand is what type of Mixture:
A
Homogeneous
B
Heterogeneous
8) Sugar and water is what type of mixture:
A
Homogenous
B
Heterogeneous
9) Rusting is similar to which type of reaction?
A
Melting ice cream
B
Burning wood
10) 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
11) An element (atom) that cannot be separated any further:
A
Compound
B
Pure Substance
12) When two atoms(elements) combine chemically, they form a :
A
Pure Substance (element)
B
Compound (molecule)
13) Which state of matter has particles that are tightly packed and moves the slowest?
A
Liquid
B
Solid
14) Which state of matter shows particles that slide past one another?
A
Liquid
B
Solid
15) Which is a chemical property of matter?
A
Density
B
Melting
C
Reactivity
16) Increasing the temperature causes:
A
A physical change and particles to speed up
B
A Chemical change and particles slow down
17) Which is a not physical property of matter?
A
It was hard
B
It made sparks when dropped
C
It had a mass of 10g
18) Oil and water mixture:
A
The oil and water has the same density
B
Will mix completely forming a homogeneous mixture
C
Will not mix completely forming a heterogeneous mixture
19) Salt and water mixture:
A
Has same properties and becomes a homogeneous mixture
B
Has different properties and becomes a heterogeneous mixture
20) 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
A, B, C
B
B, C, A
C
C, B, A
*select an answer for all questions
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