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1. what tools does Jenny prepare for the experiment?
A jar full of water and a piece of cardboard
Careful reading
2. How does Jenny do the experiment?(steps)
First, ___________the jar ___________the cardboard
and _________ the jar ___________.
Next, ____________ your hand ____________
3. If we use a pingpang ball instead of the cardboard,
what will happen?
cover with
turn over
take off
1. what can we discover from the experiment?
The air pressure pushing up on the cardboard is higher than that of the water pushing down from inside the jar.
The higher air pressure outside the jar holds the cardboard in place.
Listening
listen to Wang Mei's e-mail and fill in the blanks
Science affects people's ____________lives. Without the scientific developments of recent years, our lives would be very different. Can you imagine life without computers or
_______________? Scientific _________________are making our lives better and better. DNA is really one of the most amazing things on the earth. Many people think it will _________
the world.
everyday
mobile phones
discoveries
change
He cleans the street ________, and it is his
________ work.
every day
everyday
Let's do it
discover affect that in place develop