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Flashcards in Mass Weight And Denisty Deck (11):

What is mass

The amount of matter of something


What is weight

Force of gravity acting on something
Newton meter


How do you find weight

Kg x 10


How do you find density

Mass/ volume


Density of a regular solid

⚡️collect blocks of different sizes but same material

⚡️measure the mass of each block using an electronic balance and record in a table

⚡️calculate the volume by lxbxh

⚡️calculate the density of each block

⚡️calculate the average density


Density of a liquid

✨ collect the apparatus

✨place empty measuring cylinder on the electronic balance. Measure and record it’s mass

✨pour some liquid into the cylinder and record new mass

✨calculate the mass mass of the liquid and record value

✨measure the volume of liquid and record this value

✨calculate the density

✨empty the container and repeat with the same liquid but different volumes


Density of an irregular solid

✨collect apparatus

✨measure the mass of the plasticine with electronic balance

✨pour water into a measuring cylinder, measure and record its value

✨carefully place plasticine in the measuring cylinder, measure and record new volume

✨the difference of initial volume and final volume is the volume of the plasticine. Record value.



Solids particles

The particles in a solid are held close together by the intermolecular forces of attraction. Particles are so tightly bound and close together they can only vibrate around a fixed position and can’t move to another location


Liquid particles

Particles have enough space to move around and slide past each other as collisions between the particles are strong enough to forces them apart. However the particles still attract one another due to the influence of the intermolecular forces of attraction between them


Gas particles

In a gas there is much space. The particles are far apart and can mov about freely and independent of each other. The particles move at random because they have overcome the intermolecular forces of attraction, they collide with each other and bounce in all directions


Changes of state and Kinetic theory

✨solids are made up of vibrating molecules

✨adding heat gives molecules more kinetic energy, causes more vigorous vibrations

✨as the bonds between the molecules are broken, solids turn to liquids

✨as more energy given it liquids, more bonds are broke and the free molecules move much faster

✨those molecules that are fats enough and moving towards the surface can break free of the liquid and become a gas