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

1#

1. Which bonds are responsible for the c /ij: dr07oeuxoqr4 5oohesive 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 followik,xhj-e;nns 4dvt 0tw(ls,bvv u;c+) ng aid in the transfer of water between cells in a leaf and;sl, tk4wu+ncesx )vh ,-db(0 nv ;jvt the outside environment?

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#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

3. Which of the following are properties of most enzyme molpp*sep x7a, lccc +)vlrp +w mlxrw;52 73yif/ecules?

A. Hydrophobic and insoluble.

B. Hydrophilic and soluble.

C. Hydrophobic and soluble.

D. Hydrophilic and insoluble.

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4#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

4. Why is water a polar molecutv7bentv k yy9-xg2w/3 5 ,qymle?

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 moleculeew6 c 0v: bqh9*tp99gmmuq (bs.

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6#

问答题 ( 1.0 分) 切至整卷模式搜藏此题

6. State the property of water that causes water to be reta:woy:ktp0) h gined in soil by capillarty:g0wokp )h:y action.

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7#

问答题 ( 1.0 分) 切至整卷模式搜藏此题

7. Explain why the lipid tails of phospholipid moleculesp6avhs;e /kx2 ievs 86twso/4 in the plasma membrane of cells svsx2hw a48io6/ep v/6; tkes 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 pro brlp257dm -ijperties of water using a specific example of the consequence of each pmip jr-l2d75broperty to a named animal in aquatic environments

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9#

问答题 ( 1.0 分) 切至整卷模式搜藏此题

9. Outline two reasons x qr53vjmec+ adg)a; 3why conditions 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 habitable zone around them. kk, ekm(qe52izm /9jrfjq v kv7,s +j1ekjmj /+v7jrqe,vzk19,km5i(s k2 fq

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

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