Grade 4 Science Unit 3

A substance is ...

• everything around us

• a certain type of matter

• a pure type of solid, liquid, or gas

• a very small part or bit of something

Objects can be made of different types of .... For example, a school desk can be made of wood and metal.

• substances

• materials

• particles

• matters

Study the picture!

The correct name of particle model for (p), (q), and (r) respectively is ...

• solid, liquid, and gas

• liquid, solid, and gas

• liquid, gas, and solid

• gas, solid, and liquid

The particles are quite close together, it has no fixed shape and can flow, its particles move around each other. Those properties belong to the particles of ...

• solid

• plasma

• liquid

• gas

Danny investigated how much time it took for different types of solid with the same volume to flow through a funnel from one beaker into another beaker. There are his results. Which solid flowed slowest?

• sugar

• salt

• flour

• sand

Solids and liquids are different states of materials and substances. Sofia puts water into an ice tray. She puts the ice tray in the freezer. The state of water when she takes the ice tray from the freezer is ...

• gas

• plasma

• solid

• liquid

Lisa has sugar, salt, oil, glass, syrup, vinegar, and spoon. The objects considered as solid form are ...

• salt, oil, and vinegar

• sugar, salt, and glass

• oil, syrup, and vinegar

• syrup, vinegar, and spoon

Solids melt because ...

• their particles gain energy and break away from the solid

• their particles are not moving fast enough to stay in the solid

• new liquid particles form when the solid is heated

• solids cannot keep their shape when heated

Study the picture! Examples of chemical changes are represented by the picture...

• (P) and (Q)

• (P) and (R)

• (R) and (Q)

• (R) and (S)

Study the picture! The factors that make iron nail in tube A was rusted are ...

• Water and air

• Water and oil

• Only oil

• Length of iron