上海牛津7Bwaterfestival公开课
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6) Water that is safe to drink is called____. A. clean B. polluted C. drinkable
7) How many forms does water have?
形态；形式
turn into 转变成
water
ice
steam
fr_e e_ze
When..., it turns into...
The three forms of water
boils
A: What happens when… freezes ? melts cools down
B: When …, it turns into ….
Look and say
When…, it….
Put a dry lid on a glass of hot water. Wait for 10 seconds (秒).Take the lid off. What can you see under the lid?
• Drops of water.
What happens when water freezes?
Read and fill in the blanks:
Water Water has three f_o_r_m__s_, they are s__te_a_m__, ice and water. When water b_o_il_s__, it turns into steam. When water f_re_e_z_e_s_, it turns into ice. When ice m_e_lt_s__, it turns into water. When steam c_o_o_ls_ d_o_w_n_, it turns into water, too. If you put a dry lid on a glass of hot water, and wait for ten seconds, then t_a_k_e__ the lid o_ff_, you’ll find drops of water on the lid. That’s because the hot water in the glass t_u_rn_s_ i_n_to_ steam and the steam turns into drops of water on the lid. If you put some ice cubes in a glass of water and wait for two minutes, then look at the o_u_ts_i_d_e_ of the glass, you’ll find d_ro_p_s_ of water on the glass, too. That’s because the steam in the air turns into water on the c_o_ld_ glass. All living things need water to live. People can live s_e_v_e_ra_l weeks without food, but only a few days wi_th_o_u_t_ water. We should drink 6-8 gl_a_s_s_e_s_ of water each day! Without water, the earth would look like the moon. How terrible it would be if there were n_o_ water!
The three forms of water
Nothing can cut me. If you wash me more, I will be dirtier. I have no smell, no colour.
• Who am I?
Yeah! I am water!
Water Quiz
4) A hundred years ago, earth had_______. A. much more water than there is now B. a lot less water than there is now C. the same amount there is now
5) How long could you live without water? A. About three months B. About seven days C. About one day
②
③
④
①
Group Competition:
What happens when water boils?
• When water boils ,it turns into steam.
What happens when ice melts?
• When ice melts, it turns into water.
• Drops of waLeabharlann Baiduer. • The steam in the air turns into
water on the cold glass.
What happens when steam cools down?
• When steam cools down, it turns into water.
• When water freezes, it turns into ice.
Put some ice cubes in a glass of water. Wait for 2 minutes. Look at the outside of the glass. What is on the glass? How does it happen?
1) How much of the water on earth is available(可利用的） to drink? A. 95% B. 26% C. 1%
2) How much of your body is made up of water? A. 75% B. 25% C. 6%
3) How much water should you drink daily for good health? A. 1-2 glasses B. 3-4 glasses C. 6-8 glasses
_b o_ i_ l_
/ bɔil /
melt
/ melt /
Look and match: A. freeze B. melt C. cool down D. boil
melt②
③
freeze
co④ol down 冷却
①
boil
Listen and fill in the blanks
• What _h_a_pp_e_ns__ when water boils? • When water __bo_il_s__, it turns into _s_te_a_m__. • What happens _w_h_en__ water freezes? • When water _fr_e_ez_e_s , it turns __in_t_o ice. • What happens when ice melts? • When water melts, it turns into _w_at_e_r _. • What happens when steam _c_o_ol_s down? • When _s_te_a_m_ cools down, it __tu_r_ns_in_t_o _ water.
7) How many forms does water have?
形态；形式
turn into 转变成
water
ice
steam
fr_e e_ze
When..., it turns into...
The three forms of water
boils
A: What happens when… freezes ? melts cools down
B: When …, it turns into ….
Look and say
When…, it….
Put a dry lid on a glass of hot water. Wait for 10 seconds (秒).Take the lid off. What can you see under the lid?
• Drops of water.
What happens when water freezes?
Read and fill in the blanks:
Water Water has three f_o_r_m__s_, they are s__te_a_m__, ice and water. When water b_o_il_s__, it turns into steam. When water f_re_e_z_e_s_, it turns into ice. When ice m_e_lt_s__, it turns into water. When steam c_o_o_ls_ d_o_w_n_, it turns into water, too. If you put a dry lid on a glass of hot water, and wait for ten seconds, then t_a_k_e__ the lid o_ff_, you’ll find drops of water on the lid. That’s because the hot water in the glass t_u_rn_s_ i_n_to_ steam and the steam turns into drops of water on the lid. If you put some ice cubes in a glass of water and wait for two minutes, then look at the o_u_ts_i_d_e_ of the glass, you’ll find d_ro_p_s_ of water on the glass, too. That’s because the steam in the air turns into water on the c_o_ld_ glass. All living things need water to live. People can live s_e_v_e_ra_l weeks without food, but only a few days wi_th_o_u_t_ water. We should drink 6-8 gl_a_s_s_e_s_ of water each day! Without water, the earth would look like the moon. How terrible it would be if there were n_o_ water!
The three forms of water
Nothing can cut me. If you wash me more, I will be dirtier. I have no smell, no colour.
• Who am I?
Yeah! I am water!
Water Quiz
4) A hundred years ago, earth had_______. A. much more water than there is now B. a lot less water than there is now C. the same amount there is now
5) How long could you live without water? A. About three months B. About seven days C. About one day
②
③
④
①
Group Competition:
What happens when water boils?
• When water boils ,it turns into steam.
What happens when ice melts?
• When ice melts, it turns into water.
• Drops of waLeabharlann Baiduer. • The steam in the air turns into
water on the cold glass.
What happens when steam cools down?
• When steam cools down, it turns into water.
• When water freezes, it turns into ice.
Put some ice cubes in a glass of water. Wait for 2 minutes. Look at the outside of the glass. What is on the glass? How does it happen?
1) How much of the water on earth is available(可利用的） to drink? A. 95% B. 26% C. 1%
2) How much of your body is made up of water? A. 75% B. 25% C. 6%
3) How much water should you drink daily for good health? A. 1-2 glasses B. 3-4 glasses C. 6-8 glasses
_b o_ i_ l_
/ bɔil /
melt
/ melt /
Look and match: A. freeze B. melt C. cool down D. boil
melt②
③
freeze
co④ol down 冷却
①
boil
Listen and fill in the blanks
• What _h_a_pp_e_ns__ when water boils? • When water __bo_il_s__, it turns into _s_te_a_m__. • What happens _w_h_en__ water freezes? • When water _fr_e_ez_e_s , it turns __in_t_o ice. • What happens when ice melts? • When water melts, it turns into _w_at_e_r _. • What happens when steam _c_o_ol_s down? • When _s_te_a_m_ cools down, it __tu_r_ns_in_t_o _ water.