Physical and Chemical Properties/Changes

A metal coin has certain properties that can be measured.  Which property of a coin is different on the moon than it is on Earth?  SC.8.P.8.2

• density

• mass

• volume

• weight

Which statement about mass or weight is correct?  SC.8.P.8.2

• Weight directly measures force

• Mass directly measures force

• Mass directly measures force

• Weight is the scientific term for mass

Tags

NGSS.MS-PS2-4

NGSS.MS-PS2-2

Dalton's mass is 80 kilograms on Earth and 80 kilograms on the moon. However, his weight on the Earth is 500 Newtons and on the moon 4060Newtons.  Why does Dalton's mass stay the same, but her weight changes?

• The gravitational pull on Earth is more than the gravitational force on the moon

• Gravity does not exist in the universe except on planet Earth.

• Dalton has more matter on the moon than on Earth.

Tags

NGSS.MS-PS2-4

How is a chemical change different from a physical change?

• There is no difference in a chemical change and physical change.

• In a physical change the molecular structure is altered producing a new substance.

• In a chemical change the molecular structure is altered producing a new substance.

• A chemical change is only a change in appearance.

Tags

NGSS.MS-PS1-5

 The density of a substance equals its mass divided by its volume (D=m/V).  Your teacher gives you a mystery substance that has a mass of 120 grams and a volume of 60 cm3.  What is the density of the mystery substance? SC.8.P.8.3

• 200g/cm3

• 0g/cm3

• 18 g/cm3

• 2 g/cm3

 The density of a substance equals its mass divided by its volume (D=m/V).  Your teacher gives you a mystery substance that has a mass of 10 grams and a volume of 2 cm3.  What is the density of the mystery substance? SC.8.P.8.3

• 20 g/cm3

• 5g/cm3

• 5grams

• 35g/cm3

Some substances exist as gases at room temperature (oxygen and carbon dioxide). while others like silica, is a solid at room temperature.  Which of the following best explains why silicon dioxide is a solid at room temperature, but water is a liquid?

• Silicon dioxide is soluble in water

• water has a higher density than silicon dioxide

• Silicon dioxide has a higher melting point than water

• Water conducts electricity, but silicon dioxide does not.

Tags

NGSS.MS-PS1-4

Using a graduated cylinder, Aysha wants to find out the volume of a marble. She pours 50mL of water into the graduated cylinder and records the water level of 50 mL. She then drops the marble into graduated cylinder and records the new water level of 90 mL. What is the volume of the marble?

• 40 mL

• 140 mL

• 4500 mL

• 90 mL

  Which of these choices is a physical property of an element that remains the same no mater how much matter is present.

• mass

• weight

• density

• solubility

When separating a mixture of steel fillings, gold fillings, and sand, which would be physical property to focus on for he first step of separating the mixture?

• melting point

• density

• melting point

• magnetism