8th Grade Final Review Medium (Class) Question Preview (ID: 25741)


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Wen you open the door to a refrigerator for a minute, what happens?
a) Thermal energy in the refrigerator is transferred to the air outside the refrigerator
b) Thermal energy in the air outside the refrigerator is transferred to the inside of the refrigerator
c) The temperature of the air inside the refrigerator decreases
d) The temperature of the air just outside the refrigerator increases

Which units are used to measure energy?
a) Pounds
b) Meters
c) Degrees Celsius
d) Calories

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) Put it in a glass of room temperature water
c) Put it in an insulating container
d) Break it into pieces and warm up the pieces

Which of the following is used to measure speed?
a) Meters
b) Seconds
c) Seconds per meter
d) Meters per seconds

A ball rolls across a smooth surface t a steady 0.5 miles per hour (MPH). What is its acceleration?
a) 0
b) 9.8 m/s2
c) 0.5 m/s
d) 2 m/s2

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

What is the force needed to accelerate a 10kg object at 2 m/s2?
a) 5N
b) 2N
c) 0.2N
d) 20N

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 toxic
d) It is not hazardous

If you place a solid in water, you can determine:
a) The density of the solid relative to water
b) The toxicity of the solid relative to water
c) The flammability of the solid
d) The reactivity of the solid relative to copper chloride

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) 10 g/mL
c) 5 g/mL
d) 0.2 g/mL

The life cycle of a product refers to
a) The amount of time the product is expected to last
b) The stages from when the product is made until it is disposed of
c) The guarantee that the manufacturer provides
d) How the product is used in its life

Which of the following is a chemical property of a substance? The substance
a) conducts electricity
b) reacts with hydrochloric acid
c) scratches glass
d) is denser than water

Which of the following is NOT a property of a material?
a) Flexibility
b) Luster
c) Shape
d) Texture

The compound sucrose has a chemical formula of C12H22O11. How many elements are in one molecule of sucrose?
a) 3
b) 12
c) 22
d) 45

An element contains
a) One kind of atom
b) Two or more kinds of atoms
c) One kind of molecule
d) Two or more kinds of molecules

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) Purchase fewer products
c) Buy from companies that use only new raw materials
d) All of the above

Water is called the universal solvent because it
a) Dissolves many other substances
b) Dissolves both salt and sugar
c) Is found throughout the universe
d) Is necessary for life

Which of the following is a true statement about acids?
a) They turn universal indicator solution blue
b) They turn pH paper green
c) Examples include vinegar and lemon juice
d) They have pH of 8 or higher

Which of the following is a true statement about bases?
a) They turn universal indicator solution blue
b) They turn pH paper green
c) Examples include vinegar and lemon juice
d) They taste sour

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