2024年4月22日发(作者：表娟)

在家可以做的物理小实验初二上

English answer：

1. Sink or Float Experiment:

Materials:

Various objects (e.g., ball, rock, wood, metal)。

Water-filled container.

Instructions:

Place the objects in the container of water.

Observe whether the objects sink or float.

Explain the results based on the concept of density.

2. Balloon Rocket:

Materials:

Balloon.

Straw.

Thread.

Empty water bottle.

Instructions:

Inflate the balloon and tie the end.

Insert the straw into the open end of the balloon.

Thread the thread through the straw and tie the other

end to the water bottle.

Hold the water bottle upside down and release the

balloon.

2024年4月22日发(作者：表娟)

在家可以做的物理小实验初二上

English answer：

1. Sink or Float Experiment:

Materials:

Various objects (e.g., ball, rock, wood, metal)。

Water-filled container.

Instructions:

Place the objects in the container of water.

Observe whether the objects sink or float.

Explain the results based on the concept of density.

2. Balloon Rocket:

Materials:

Balloon.

Straw.

Thread.

Empty water bottle.

Instructions:

Inflate the balloon and tie the end.

Insert the straw into the open end of the balloon.

Thread the thread through the straw and tie the other

end to the water bottle.

Hold the water bottle upside down and release the

balloon.