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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 just outside the refrigerator increases
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 inside the refrigerator decreases
2) Which units are used to measure energy?
A
Degrees Celsius
B
Calories
C
Meters
D
Pounds
3) Which of the following methods will NOT melt an ice cube quickly?
A
Hold it in your hand and change hands when one hand gets cold
B
Break it into pieces and warm up the pieces
C
Put it in an insulating container
D
Put it in a glass of room temperature water
4) Which of the following is used to measure speed?
A
Meters per seconds
B
Seconds per meter
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
In a frictionless environment
B
Moving with a constant speed
C
Decelerating
D
Accelerating
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 not hazardous
B
It is flammable
C
It is radioactive
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 flammability of the solid
C
The reactivity of the solid relative to copper chloride
D
The density of the solid relative to water
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
0.2 g/mL
B
10 g/mL
C
5 g/mL
D
20 g/mL
11) The life cycle of a product refers to
A
The amount of time the product is expected to last
B
How the product is used in its life
C
The stages from when the product is made until it is disposed of
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
Luster
B
Shape
C
Flexibility
D
Texture
14) The compound sucrose has a chemical formula of C12H22O11. How many elements are in one molecule of sucrose?
A
22
B
3
C
12
D
45
15) An element contains
A
One kind of atom
B
Two or more kinds of molecules
C
Two or more kinds of atoms
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
Buy products that cannot be recycled
B
All of the above
C
Purchase fewer products
D
Buy from companies that use only new raw materials
17) Water is called the universal solvent because it
A
Dissolves many other substances
B
Dissolves both salt and sugar
C
Is necessary for life
D
Is found throughout the universe
18) Which of the following is a true statement about acids?
A
They have pH of 8 or higher
B
Examples include vinegar and lemon juice
C
They turn universal indicator solution blue
D
They turn pH paper green
19) Which of the following is a true statement about bases?
A
They taste sour
B
They turn pH paper green
C
Examples include vinegar and lemon juice
D
They turn universal indicator solution blue
*select an answer for all questions
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