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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
Thermal energy in the air outside the refrigerator is transferred to the inside of the refrigerator
B
The temperature of the air inside the refrigerator decreases
C
The temperature of the air just outside the refrigerator increases
D
Thermal energy in the refrigerator is transferred to the air outside the refrigerator
2) Which units are used to measure energy?
A
Pounds
B
Meters
C
Calories
D
Degrees Celsius
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
Break it into pieces and warm up the pieces
D
Hold it in your hand and change hands when one hand gets cold
4) Which of the following is used to measure speed?
A
Seconds per meter
B
Meters per seconds
C
Seconds
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
9.8 m/s2
D
0
6) Which of the following describes an object that is speeding up? The object is
A
Decelerating
B
Accelerating
C
In a frictionless environment
D
Moving with a constant speed
7) What is the force needed to accelerate a 10kg object at 2 m/s2?
A
2N
B
20N
C
0.2N
D
5N
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 not hazardous
B
It is radioactive
C
It is flammable
D
It is toxic
9) If you place a solid in water, you can determine:
A
The density of the solid relative to water
B
The reactivity of the solid relative to copper chloride
C
The toxicity 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
5 g/mL
B
20 g/mL
C
0.2 g/mL
D
10 g/mL
11) The life cycle of a product refers to
A
How the product is used in its life
B
The stages from when the product is made until it is disposed of
C
The guarantee that the manufacturer provides
D
The amount of time the product is expected to last
12) Which of the following is a chemical property of a substance? The substance
A
reacts with hydrochloric acid
B
scratches glass
C
conducts electricity
D
is denser than water
13) Which of the following is NOT a property of a material?
A
Texture
B
Shape
C
Luster
D
Flexibility
14) The compound sucrose has a chemical formula of C12H22O11. How many elements are in one molecule of sucrose?
A
12
B
45
C
22
D
3
15) An element contains
A
Two or more kinds of atoms
B
One kind of atom
C
Two or more kinds of molecules
D
One kind of molecule
16) A consumer wants to do his or her part to reduce the production of waste. Which action would be most effective?
A
All of the above
B
Buy products that cannot be recycled
C
Buy from companies that use only new raw materials
D
Purchase fewer products
17) Water is called the universal solvent because it
A
Is necessary for life
B
Dissolves many other substances
C
Is found throughout the universe
D
Dissolves both salt and sugar
18) Which of the following is a true statement about acids?
A
They have pH of 8 or higher
B
They turn pH paper green
C
They turn universal indicator solution blue
D
Examples include vinegar and lemon juice
19) Which of the following is a true statement about bases?
A
They turn universal indicator solution blue
B
Examples include vinegar and lemon juice
C
They turn pH paper green
D
They taste sour
*select an answer for all questions
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