Topic A1.1 Water - 无忧得胜-网上国际课程 (5edu.win)

1#

1. Which bonds are respodorl)ksl0s gf *(5 pydb,dq 88nsible for the cohesive properties of water molecules?

A. Hydrogen bonds between water molecules

B. Hydrogen bonds within water molecules.

C. Covalent bonds between water molecules.

D. Covalent bonds within water molecules.

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2#

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2. Which of the followtf hyfu48 am3/ cg9,0dv)djy wing aid in the transfer of water between cells in a leaf and the outside enviw4mhg0dta,9fd/y uy 3fcvj8 )ronment?

A. Tension in xylem vessels.

B. Active transport of water from cell to cell.

C. Capillary action in the cell walls.

D. Condensation of water on the leaf surface.

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3#

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3. Which of the following are properties sa ks6d/ *:kvdof most enzyme molecules?

A. Hydrophobic and insoluble.

B. Hydrophilic and soluble.

C. Hydrophobic and soluble.

D. Hydrophilic and insoluble.

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4#

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4. Why is water a polam( knxnp 7fbtvp8 /ys3c /0l. rimwd05r molecule?

A. Because it contains hydrogen.

B. Because hydrogen and oxygen are linked with a covalent bond.

C. Because there are hydrogen bonds in the water molecule.

D. Because the electrons in the covalent bond are not shared equally.

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5#

问答题 ( 1.0 分) 切至整卷模式搜藏此题

5. Draw a diagram to represent a water m q6zo9 x*y+mwnolecule.

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6#

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6. State the property of water that causes water ;cf ph64zog (f;4i ngp :rib6fto be retained in soil by capillzpffp; in46gbfgo;6hi rc( 4 :ary action.

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7#

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7. Explain why the lipid tails of phospholiapr6kp xqe 0l 7ua+x+;pid molecules in the plasma membrane of ce a+a+p0xk6que7lpr ;x lls are
“hydrophobic”.

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8#

问答题 ( 1.0 分) 切至整卷模式搜藏此题

8. Explain three physical properties of water using a spe24 7 21tzxxctuuf6vosrt7 os7lb;/ xf cific example of the consequence of eac stuf14 ob7z r6/2 cv2t;uf7xolxs7 xth property to a named animal in aquatic environments

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9#

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9. Outline two reasons why cond nn6 g)puk7lk5itions on the Earth retain water on its surface

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10#

问答题 ( 1.0 分) 切至整卷模式搜藏此题

10.The graph shows the range of known stars and the habitanmf 57mv(btkg 28f o,iwe,-qx ble zone around them. met7(o-g,fmk8,n2 wivx 5 bqf

Describe what is meant by the term ‘habitable zone’.

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