
Vesi kui aine
Authored by Kreete-Lisette Oselin
Science
5th Grade
Used 4+ times

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25 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Millised on aine kolm olekut?
tahke, vedel ja tugev
tahke, vedel ja gaasiline
tahkis, vedel ja gaas
vedel, aur ja tahkis
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Vesi on tahkes olekus ...
vesi
udu
veeaur
jää
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Vesi on gaasilises olekus ...
vesi
lumi
udu
veeaur
Answer explanation
Udu ei ole gaasiline vesi, vaid koosneb pisikestest vedela vee tilgakestest, mis hõljuvad õhus. Nt pilved – need on ka väikesed veepiisad või jääkristallid, mitte veeaur.
Gaasiline vesi = veeaur → täiesti nähtamatu.
4.
MULTIPLE SELECT QUESTION
45 sec • 1 pt
Millised omadused iseloomustavad aine vedelat olekut?
võtab anuma kuju
kindel kuju
voolavus
tugevalt kokkusurutav
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Milline aine olek on kujutatud pildil?
tahke
vedel
gaasiline
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Aine ülemineks gaasilisest olekust vedelasse
kondenseerumine
tahkumine
aurustumine
härmatumine
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Vesi on kõige tihedam temperatuuril ...
0°C
-4°C
4°C
100°C
Answer explanation
Vesi on kõige raskem ja tihedam siis, kui selle temperatuur on +4 °C.
Talvel: Järve põhjas on alati +4 °C vesi. Selle peale jäävad jahedamad ja kergemad veekihid ning kõige peal võib tekkida jää. Nii saavad kalad ja muud veeloomad järves talvel talvituda.
Suvel: Järve põhjas on ikka +4 °C vesi. Ülemised kihid muutuvad aga soojemaks ja kergemaks, sest päike soojendab neid.
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