Primary 4 Science Chapter 2 and 3

The following is the characteristic of particles, except ________

• particles are always moving

• particles are very small

• the space between particles in liquid and solid are different

• particles do not react with each other

As most particles are to small to see, we can use a ________ to talkabout them

• camera

• food chain

• book

• model

When the particles in a subtance are tighly packed we can call the subtance a ________

• plasma

• gas

• solid

• liquid

The chocolate melts when we heat them. When we use a stove to do it we can say we ________ energy to the chocolate.

• post

• change

• transfer

• place

When energy changes from one to another, we can call it a/ an ________

• energy change

• physical reaction

• chemical reaction

• energy transfer

Liquids can follow the shape of their container because ________

• liquid particles can move around more easily

• liquid particles can be poured

• liquid particles are not solid

• liquid particles have air between them

Something that describes what a subtance or material like called ________

• property

• rule

• table

• model

When a material change from one form to another, it can be called a ________

• change of state

• chemical reaction

• change of state and chemical reaction

• neither change of state and nor chemical reaction

When something ________ it change from liquid to solid.

• melts

• solidifies

• chemically reacts

• gets heated up

When energy moves from one thing to another is called a/ an ________

• energy change

• energy transfer

• energy placing

• energy pushing