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8th Grade Final Review Medium (Class)
Test Description: Review for final
Instructions: Answer all questions to get your test result.
1) Wen you open the door to a refrigerator for a minute, what happens?
A
The temperature of the air inside the refrigerator decreases
B
Thermal energy in the air outside the refrigerator is transferred to the inside of the refrigerator
C
Thermal energy in the refrigerator is transferred to the air outside the refrigerator
D
The temperature of the air just outside the refrigerator increases
2) Which units are used to measure energy?
A
Degrees Celsius
B
Meters
C
Pounds
D
Calories
3) Which of the following methods will NOT melt an ice cube quickly?
A
Put it in a glass of room temperature water
B
Put it in an insulating container
C
Hold it in your hand and change hands when one hand gets cold
D
Break it into pieces and warm up the pieces
4) Which of the following is used to measure speed?
A
Seconds
B
Meters per seconds
C
Seconds per meter
D
Meters
5) A ball rolls across a smooth surface t a steady 0.5 miles per hour (MPH). What is its acceleration?
A
2 m/s2
B
0.5 m/s
C
0
D
9.8 m/s2
6) Which of the following describes an object that is speeding up? The object is
A
Accelerating
B
In a frictionless environment
C
Decelerating
D
Moving with a constant speed
7) What is the force needed to accelerate a 10kg object at 2 m/s2?
A
2N
B
5N
C
20N
D
0.2N
8) The label on a container of a drain cleaner says: Harmful or fatal if swallowed. Causes severe irritation to eyes, skin, mouth and clothing. Which type of hazard does the drain cleaner pose?
A
It is flammable
B
It is radioactive
C
It is not hazardous
D
It is toxic
9) If you place a solid in water, you can determine:
A
The toxicity of the solid relative to water
B
The reactivity of the solid relative to copper chloride
C
The density of the solid relative to water
D
The flammability of the solid
10) Jane measures a piece of metal and determines it has a mass of 10 grams and a volume of 2 mL. What is the density of the piece of meter?
A
20 g/mL
B
0.2 g/mL
C
10 g/mL
D
5 g/mL
11) The life cycle of a product refers to
A
The stages from when the product is made until it is disposed of
B
The amount of time the product is expected to last
C
How the product is used in its life
D
The guarantee that the manufacturer provides
12) Which of the following is a chemical property of a substance? The substance
A
conducts electricity
B
is denser than water
C
reacts with hydrochloric acid
D
scratches glass
13) Which of the following is NOT a property of a material?
A
Flexibility
B
Luster
C
Shape
D
Texture
14) The compound sucrose has a chemical formula of C12H22O11. How many elements are in one molecule of sucrose?
A
22
B
12
C
45
D
3
15) An element contains
A
Two or more kinds of molecules
B
One kind of molecule
C
One kind of atom
D
Two or more kinds of atoms
16) A consumer wants to do his or her part to reduce the production of waste. Which action would be most effective?
A
Purchase fewer products
B
Buy from companies that use only new raw materials
C
All of the above
D
Buy products that cannot be recycled
17) Water is called the universal solvent because it
A
Dissolves both salt and sugar
B
Is found throughout the universe
C
Is necessary for life
D
Dissolves many other substances
18) Which of the following is a true statement about acids?
A
They turn universal indicator solution blue
B
They have pH of 8 or higher
C
Examples include vinegar and lemon juice
D
They turn pH paper green
19) Which of the following is a true statement about bases?
A
Examples include vinegar and lemon juice
B
They turn pH paper green
C
They turn universal indicator solution blue
D
They taste sour
*select an answer for all questions
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