4. listen and read. weather idioms.
1. on cloud nine - very happy.
i was on cloud nine when my mother bought me a nice drese
2. come rain or shine – regularly.
i have piano lessons every monday, come rain or shine.
3. raining cats and dogs – to rain very heavily.
we will cancel the picnic; it is raining cats and dogs.​

- Look! Now we have a big house. We have four bedrooms, a dining room, a living room and a kitchen. Ally and I have our own rooms.
- The house is really big! (1) Have you bought any new furniture?
- Yes, our parents (2) have already bought this beautiful dining table. Today we will have dinner together here and mum (3) has already sewn new curtains.
Oh, the room is really beautiful. Can you show me my room?
- Of course, we can. It is next to my room. Mum (4) has just redecorated it
- (5) Has she put a new carpet on the floor? 
- Yes, she has. And she (6) has made this lamp.
-It is very cosy here.
(7) Have you seen the flowers in the garden?
- Yes, I have. (8) Do you help your Dad with the flowers?
- Yes, I do. I always help him in the garden. We (9) have planted these flowers together.
- Good girl !

Метод наблюдения - самый доступный и распространенный, требует усидчивости и внимательности. Эксперимент - еще один научный метод, использующийся при изучении природы. Проводя опыты с моделированием каких-либо условий среды и наблюдая за объектами эксперимента, за их поведением в данных условиях, можно узнать об их свойствах и закономерностях развития и поведения. Также часто используется метод измерения, чтобы установить размеры и массу различных существ и растений, а также чтобы узнать численность популяции каких-либо животных.