Mid Year 8th Grade Science Exam
-
One useful tool that may help a scientist interpret data by revealing unexpected patterns is a ....
-
Variable
-
Graph
-
Theory
-
Law
-
High Point Academy-Mr. Zrinski
Quiz Preview
- 2.
What is the greatest number of valence electrons an atom can have?
-
2
-
3
-
8
-
12
Correct Answer
A. 8 -
- 3.
During an experiment, which factors must be controlled so that researchers can draw a logical conclusion from the experiment?
-
Variables
-
Operational definitions
-
Inquiries
-
Theories
Correct Answer
A. Variables -
- 4.
When scientists create a representation of a complex process, they are ....
-
Inferring
-
Predicting
-
Classifying
-
Making models
Correct Answer
A. Making models -
- 5.
During an experiment, if you purposely change the temperature to test a hypothesis, the temperature is called the...
-
Manipulated variable.
-
Responding variable.
-
Operational variable.
-
Dependent variable.
Correct Answer
A. Manipulated variable. -
- 6.
The energy of matter in motion is called....
-
Kinetic energy
-
Potential energy
-
Chemical energy
-
Electromagnetic energy
Correct Answer
A. Kinetic energy -
- 7.
A group of parts that work together is called a ...
-
Technology
-
System
-
Process
-
Feedback
Correct Answer
A. System -
- 8.
Prototypes are used to ....
-
Patent an invention.
-
Test the operation of a product.
-
Identify a need.
-
Research a problem.
Correct Answer
A. Test the operation of a product. -
- 9.
How would you calculate the density of an object?
-
Divide its weight by its volume.
-
Divide its mass by its volume.
-
Multiply its volume times its mass.
-
Multiply its weight times its mass.
Correct Answer
A. Divide its mass by its volume. -
- 10.
Choose Option 1-Free Gift
-
Option 1
-
Option 2
-
Option 3
-
Option 4
Correct Answer
A. Option 1 -
- 11.
How many meters are there in a kilometer?
-
10
-
100
-
1000
-
10,000
Correct Answer
A. 1000 -
- 12.
What is the first thing you should do if an accident occurs?
-
Find the emergency equipment.
-
Notify the teacher.
-
Go to the nearest hospital.
-
Start first aid treatment.
Correct Answer
A. Notify the teacher. -
- 13.
Which of the following is a valid reason why a scientist might reject a scientific theory?
-
Some people disagree with it.
-
It covers too broad a topic.
-
New evidence contradicts it.
-
It is too old.
Correct Answer
A. New evidence contradicts it. -
- 14.
In the laboratory, volumes of liquid are usually measured with a(n).....
-
Electrode
-
Scale
-
Triple beam balance
-
Graduated cylinder
Correct Answer
A. Graduated cylinder -
- 15.
Acids are described as corrosive because they....
-
Turn litmus blue
-
Taste bitter.
-
"eat away" at other materials.
-
Feel slippery
Correct Answer
A. "eat away" at other materials. -
- 16.
Anything that has mass and takes up space is called...
-
Matter
-
Energy
-
Heterogeneous
-
Homogeneous
Correct Answer
A. Matter -
- 17.
An engineer is a.....
-
Legal document issued by a government that gives an inventor exclusive rights to make, use, or sell an invention for a limited time.
-
Person who studies plants.
-
Person trained to use both technological and scientific knowledge to solve practical problems.
-
Possible explanation for a set of observations or answer to a scientific question.
Correct Answer
A. Person trained to use both technological and scientific knowledge to solve practical problems. -
- 18.
A chemical reaction that absorbs energy in the form of heat is described as
-
Endothermic
-
Exothermic
-
Combustion
-
Unbalanced
Correct Answer
A. Endothermic -
- 19.
Ions that are made of more than one atom are examples of ....
-
Polyatomic ions
-
Negative ions
-
Positive ions.
-
Neutral ions.
Correct Answer
A. Polyatomic ions -
- 20.
A summary of what you have learned from a scientific experiment is called a(n)....
-
Hypothesis
-
Inquiry
-
Conclusion
-
Law
Correct Answer
A. Conclusion -
- 21.
From an element's location in the periodic table, you can predict...
-
Its properties.
-
Its chemical name.
-
Its chemical symbol.
-
When it was discovered.
Correct Answer
A. Its properties. -
- 22.
The metric system of measurement is based on the number ....
-
1
-
10
-
12
-
100
Correct Answer
A. 10 -
- 23.
Chemistry is....
-
A characteristic of a substance that can be observed without changing the substance into another substance.
-
The study of matter and how matter changes.
-
Anything that has mass and takes up space.
-
A rapid reaction between oxygen and a substance called a fuel.
Correct Answer
A. The study of matter and how matter changes. -
- 24.
Which of these statements about a column of the periodic table is true?
-
The elements have similar properties.
-
The elements have a wide range of properties.
-
The elements have the same atomic number.
-
The elements have the same atomic mass.
Correct Answer
A. The elements have similar properties. -
- 25.
An ionic bond is the attraction between....
-
Similarly charged ions.
-
Oppositely charged ions.
-
Neutral ions.
-
Neutral atoms.
Correct Answer
A. Oppositely charged ions. -
- 26.
The measurement of how much mass is contained in a given volume is called...
-
Weight
-
Melting point
-
Boiling point
-
Density
Correct Answer
A. Density -
- 27.
Which is a characteristic property of acids?
-
They turn blue litmus paper red.
-
They turn red litmus paper blue.
-
They taste bitter.
-
They do not react with metals.
Correct Answer
A. They turn blue litmus paper red. -
- 28.
Because atoms are so small.....
-
Scientists create models to describe them.
-
They can not be made of smaller particles.
-
There is no way to describe them.
-
They cannot be synthesized by scientists.
Correct Answer
A. Scientists create models to describe them. -
- 29.
CaCO3 represents a chemical…..
-
Symbol
-
Formula
-
Subscript
-
Reaction
Correct Answer
A. Formula -
- 30.
In the periodic table, the most reactive metals are found ....
-
In Group 1, the first column on the left.
-
In Period 1, the first row across the top.
-
In Groups 13 through 16 in the center.
-
In Periods 6 and 7 at the bottom.
Correct Answer
A. In Group 1, the first column on the left. -
- 31.
Observations that deal with a number or amount are called...
-
Manipulated observations.
-
Quantitative observations.
-
Qualitative observations.
-
Operational observations.
Correct Answer
A. Quantitative observations. -
- 32.
What is the chemical name for the compound with the formula Na2 S ?
-
Sodium fluoride
-
Magnesium sulfide
-
Lithium oxide
-
Sodium sulfide
Correct Answer
A. Sodium sulfide -
- 33.
The density of a block of wood with a volume of 50 cubic centimeters and a mass of 100 grams is
-
2 g/cubic centimeter
-
0.5 g/cubic centimeter
-
500g/cubic centimeter
-
5,000g/cubic centimeter
Correct Answer
A. 2 g/cubic centimeter -
- 34.
Which of the following is a characteristic property of ionic compounds?
-
They have low melting points.
-
They have low boiling points.
-
They form hard, brittle crystals with characteristic shapes.
-
They contain no charged particles.
Correct Answer
A. They form hard, brittle crystals with characteristic shapes. -
- 35.
When an atom loses an electron, it becomes a ....
-
Positive ion.
-
Negative ion.
-
Neutral ion.
-
Neutral atom.
Correct Answer
A. Positive ion. -
- 36.
Electrons involved in bonding between atoms are...
-
Valence electrons.
-
Inside the nucleus.
-
Closest to the nucleus.
-
Positively charged.
Correct Answer
A. Valence electrons. -
- 37.
Explaining or interpreting the things you observe based on reasoning from what you already know is called...
-
Observing
-
Inferring
-
Predicting
-
Classifying
Correct Answer
A. Inferring -
- 38.
If you heat a liquid and measure the temperature at which it boils, you are measuring a(n)...
-
Atomic property
-
Physical property
-
Chemical property
-
Molecular property
Correct Answer
A. Physical property -
- 39.
One example of a chemical change is...
-
Filtering.
-
Burning wood.
-
Boiling water.
-
Crushing a can.
Correct Answer
A. Burning wood. -
- 40.
You can find the pH of a substance by using...
-
Plain paper
-
A thermometer.
-
Litmus indicator.
-
A conductivity tester.
Correct Answer
A. Litmus indicator. -
- 41.
What is the goal of technology?
-
To produce and deliver cereal.
-
To understand how the natural world functions.
-
To study the natural world.
-
To improve the way people live.
Correct Answer
A. To improve the way people live. -
- 42.
When scientists put things into categories or group together items that are alike in some way, they are ....
-
Inferring
-
Predicting
-
Classifying
-
Making models
Correct Answer
A. Classifying -
- 43.
What happens when chemical bonds break and new bonds form?
-
A physical change
-
A chemical reaction
-
Matter is destroyed
-
Surface area increases
Correct Answer
A. A chemical reaction -
- 44.
Which of the following terms means that metals can be pulled into thin strands or wires.
-
Polar
-
Alloy
-
Ductile
-
Malleable
Correct Answer
A. Ductile -
- 45.
Making a forecast of what will happen in the future based on past experience or evidence is called...
-
Observing
-
Inferring
-
Predicting
-
Classifying
Correct Answer
A. Predicting -
- 46.
How do liquid water, ice, and water vapor differ from each other?
-
They are different states of matter.
-
They are different compounds.
-
They are made of different kinds of molecules.
-
They are made of different kinds of atoms.
Correct Answer
A. They are different states of matter. -
- 47.
Which stage of the scientific process enables a scientist to check the work of other scientists?
-
Classifying
-
Concluding
-
Hypothesizing
-
Communicating
Correct Answer
A. Communicating -
- 48.
In science, a hypothesis must be
-
Correct
-
Manipulated
-
Controlled
-
Testable
Correct Answer
A. Testable -
- 49.
Soil, a salad, and sugar water are all examples of ....
-
Elements
-
Compounds
-
Mixtures
-
Atoms
Correct Answer
A. Mixtures -
Quiz Review Timeline (Updated): Mar 22, 2022 +
Our quizzes are rigorously reviewed, monitored and continuously updated by our expert board to maintain accuracy, relevance, and timeliness.
-
Current Version
-
Mar 22, 2022Quiz Edited by
ProProfs Editorial Team -
Jan 03, 2015Quiz Created by
Colleen Zeiss
Back to top