Density

The diagram shows some logs.

The logs …………………… on the surface of the water.

• float

• swim

• sink

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NGSS.3-PS2-1

The diagram shows some pieces of rubber band.

The rubber bands …………………… in the water.

• float

• swim

• sink

The diagram shows a sponge.

The sponge has many air cavities.

That span …………………….

• floats

• flies

• sinks

The diagram shows a bar of soap.

Soap has no air cavity.

The soap …………………….

• floats

• flies

• sinks

We say an object …………………… when the object is on the surface of the water.

• floats

• swims

• sinks

We say an object …………………… when the object is in the water.

• swims

• dives

• sinks

The floating or sinking of an object is related to .......................

• the weight of object against the weight of water

• the shape of object against the shape of water

• the density of object against the density of water

The density of objects is ……………………. from one to another.

• same

• fix

• different

The diagram shows a ship and an anchor.

Ship …………………… on the surface of the water but anchor …………………… in the water.

• floats, floats

• floats, sinks

• sinks, sinks

Diagram shows the conversation between Sofia and her father.

Based on the above conversation, we know that an object that is ..................... than water will floats.

• more dense

• same density

• less dense