"Dissolution Fast and Slow" Dissolution PPT Courseware 3

Description

"Dissolution Fast and Slow" Dissolution PPT Courseware 3

Comparative Experiment

In the two sets of experiments, except for one condition that needs to be studied, the other conditions are the same.

Small conclusion 1:

Through experiments, it was found that sugar dissolves faster in hot water than in cold water.

Small conclusion 2

Through experiments, we found that stirring can speed up the dissolution of sugar in water.

Small conclusion 3:

Through experiments, it was found that crushing rock sugar can speed up its dissolution in water.

The relationship between particle size and dissolution speed

1. There are 4 packs of rock sugar in the plastic bag. Please read the words on each pack carefully and choose the appropriate two packs of sugar according to the design for experiment.

2. When stirring with a bamboo stick, do not touch the wall of the beaker and stir evenly.

4. The experiment ends when one of the packets of sugar is completely dissolved or the command is heard.

Summarize

Factors that affect how quickly an object dissolves include:

water temperature

Is the water stirred?

particle size of object

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Update Time: 2024-11-16

This template belongs to science courseware Fourth Grade Science Volume 1, Textbook Edition industry PPT template

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