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8th Grade Quarter One Review Flashcards | StudBud
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8th Grade Quarter One Review
8th Grade Quarter One Review
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Science basics, scientific method, measurement, basics of chemistry
Flashcards
18 cards
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Practice quiz
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Questions
18
Answers
1
How many variables should one test in a good experiment at one time?
one
three
four
two
2
How do molecules typically react with increased temperature?
they slow down
they become still
they speed up
there is no change
3
How do cold molecules act differently than hot molecules?
cold molecules move faster than hot molecules
cold molecules move slower than hot molecules
cold molecules move at the same speed as hot molecules
4
What happens to the average speed of molecules as thermal energy increases?
molecule speed increases
the speed depends on the state of matter
molecule speed decreases
the speed is not related to temperature
5
Synthetic materials are always
created by nature or by man
created by man
created by nature
6
True or false: atoms make up all matter.
true
false
7
The substances that are changed in a chemical reaction are known as:
reactants
solvents
products
solutions
8
What is an object that is created to better understand a science concept?
model
draft
exam
9
Which is an example of a natural resource?
plastic
styrofoam
nylon
cotton
10
True or false: The products of a chemical reaction have new properties.
false
true
11
True or false: you are one of Cress's favorite students.
Cress says we are all her favorites.
false
true
12
Which step of the scientific method is written in "if..., then" format?
prediction
conclusion
analysis
hypothesis
13
Evidence that a chemical reaction has occurred may include which of the following?
all of these are evidence
gas bubbles
unexpected change in color
the substance burned
14
What
ALWAYS
forms in a chemical reaction?
a new substance
bubbles
fire
color change
15
The substances created by a chemical reaction are known as:
reactants
products
elements
atoms
16
Which of the following matter contain thermal energy?
all of them contain thermal energy
a living human
a living plant
a coin
17
What happens to your mass if you travel to the moon, compared to on Earth?
mass decreases on the moon
mass stays the same on the moon
mass increases on the moon
18
Which of the following would NOT help you determine the identity of a pure substance?
freezing point
mass
odor
color
