Expansion and Contraction

Mass can defined as

• The number of atoms in an object.

• The amount of matter in an object.

• The space taken up by an object

• None of the above.

The instrument used to determine the mass of an object is:

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• 
• 
• 

The reading on this scale is:

• 620g

• 640 g

• 0,64 g

• 602g

There are 42 almond nuts in this picture. If the total mass of the nuts is 176g, the mass of one nut is:

• 134g

• 7392g

• 7,4kg

• 4,19g

The SI unit for mass is:

• mg

• Kg

• ton

• g

The definition for WEIGHT is:

• The amount of gravitational attraction on an object.

• The number of atoms in an object.

• The amount of matter in an object.

• None of the above

The SI unit for weight is:

• Kg or kilogram

• cm³

• N or newton

• m.s^-2

The force of gravity on earth is greater than the force of gravity on the moon.

• TRUE

• FALSE

If W=mg then an object of mass 127kg on earth will have a weight of 471,17kg on the moon. (g on earth is 9,8 m.s^-2 and 3,71 m.s^-2 on the moon)

• TRUE

• FALSE

The weight of an object on the moon is 2453 N. Its mass is:

• 0,0015 Kg

• 2453 Kg

• 9100,63 Kg

• 661,19 Kg