Hi, P3 Hum pupils, do this simple experiment and answer the following questions:
1. When you drink liquid from a cup using a straw, are you really pulling the liquid up?
2. Explain why the liquid can travel up the straw and reach your mouth. (hint: related to air and pressure)
I think we are pulling the liquid up because the water is the liquid!
ReplyDelete2)Our mouth has air,the air is like a vaccum,it helps us suck up the liquid.
1)No.
ReplyDelete2)We are sucking up the empty space in the straw which is actually filled with air and when the air in the straw is sucked up and enters our mouth, the surrounding air forces the water into the space that was previously occupied by air in the straw until the water eventually enters our mouth!!
1) Yes 2) The air forces is actually sucking the liqud in the bottle . The air in our mouth sucks the liqud.
ReplyDelete1)yes
ReplyDelete2)the air helps us to suck .
1)yes
ReplyDelete2)it is just like when we breath from our nose but now it is like breathing by the mouth. we are really pulling the liqud up.
1]yes 2] because our air is like a vacume and it sucks in the lioud so actushuly the mouth has air too so thats why the licud can rea ch our mouth.these stuff use our resperatory system
ReplyDelete1)YES 2)CAUSE IN THE STRAW have air in it so the liqud can in the straw and when you suck the liqud it goes towards your mouth.
ReplyDeleteNot so sure?
ReplyDeleteno 2)It's not actually pushed up. When you suck on the straw you create a vacuum and the liquid rises to fill the vacuum.
ReplyDeleteum.....no.not really.)2.I can pull the liquid up by drinking like drinking air....?--' kkkk,OK .I don't really know.Rrrrrrr....I don't to guess,it's too difficult!!!But I'll never give up.I'll try to solve it at home!
ReplyDelete