The Properties of Water教案
what property of water does each of the four experiments illustrate?
what causes this phenomenon?
what’s this phenomenon related to?
① experiment 1 shows how air pressure causes a piece of thick paper to cling to an upturned glass of water.
② experiment 2 illustrates how substances with different density behave when placed in the same container.
③ experiment 3 is an example of how water dissolves substances and objects.
④ experiment 4 illustrates some of the differences between salt water and fresh water.
3. t: what other properties of water do you know about?
what causes the following phenomena? can you explain?
①we can get a lot of nutrients by drinking water and having soup.
②wood floats on water while iron sinks.
③the coastal areas are often neither too hot nor too cold.
④why can some living things live at the bottom of the ocean where there is no sunshine?
(if these questions are too difficult) try asking questions about the properties of water and then give answers to them.
step5: homework
1. read the text carefully and find out the detailed information about water properties.
2. think as many examples as possible to illustrate water properties.
the second period
teaching aims:
1. learn and master the some new words and phrases.
2. improve the students’ reading ability.
3. enable the students to realize that it is important to protect the water on our planet.
teaching important points:
1. improve the students’ reading ability.
2. master the following phrases:
all the way, that is, mix with, take advantage of, manage to do
teaching difficult point:
how do we make the students understand the reading passage better.
teaching methods:
1. discussion before reading to make the students interested in what they will learn.
2. fast reading to get a general idea of the text.
3. discussion after reading to make students understand what they’ve learned better.
4. careful reading to get the detailed information in the text.
teaching aids:
1. the multimedia
2. the blackboard
teaching procedures:
step 1 greetings
step 2 revision and lead-in
ask someone to illustrate water properties.
step3: pre-reading
look at the titles in the text below. do not read the whole text. pick out the subject of each paragraph. use the structures below to make six questions related to the subjects.
what is/ are ________?
what does _________ look like?
what are different parts of ______?