Question What is the greenhouse effect?
Materials Two cups, soil, two thermometers(温度计), a glass jar(罐子)
Place Outdoor area
Steps
1. Prepare two cups filled with soil, and mark A and B on the cups.
2. Stick the thermometers in cup A and cup B.
3. Put the two cups in the sunlight for 10 minutes and record the temperatures in the two cups in A1 and B1.
4. Place the glass jar upside down overcup A and keep cup B unchanged. After 10 minutes, record the temperatures in A2 and B2.
5. Compare the temperatures in cup A and cup B.
Record
| | The temperature in Step 3 | The temperature in Step 4 |
|----------|---------------------------|---------------------------|
| Cup A | A1: 28 °C | A2: 31 °C |
| Cup B | B1: 28 °C | B2: 29 °C |
Findings A1 is the same as B1.

1. Which of the following materials is needed in the experiment?
A. A stick. B. Soil.
C. Water. D. A knife.
2. What is the best weather for doing the experiment?

C. D.

3. 新考法 图片选择 Which picture can match Step 4?

C. D.

4. 新考法 句子回填 Which of the following can be put in the “”?
A. A2 is two degrees higher than B2.
B. A2 is three degrees lower than A1.
C. B2 is three degrees higher than B1.
D. B2 is one degree lower than A1.
5. In which class may Li Hua's study group share the report?
A. Maths. B. History.
C. Biology. D. Art.