پرسش و پاسخ های مشابه
سوال کنید یا به سوالات دیگران پاسخ دهید ...
درحال دریافت اطلاعات ...
با پاسخ
-
Science 4
- UNIT 1: Humans and animals
- 1.1 skeletons
- 1.2 The human skeleton
- 1.3 Why do we need a skeleton?
- 1.4 Skeletons and movement
- 1.5 Drugs as medicines
- 1.6 How medicines work?
- Check your progress
- UNIT 2: Living things and environment
- 2.1 Amazing birds
- 2.2 A habitat for snails
- 2.3 Animals in local habitat
- 2.4 Identification keys
- 2.5 Identifying invertebrates
- 2.6 How do we effect the environment?
- 2.7 Wonderful water
- 2.8 Recycling can save the earth!
- UNIT 3: Solids‚ liquids and gases
- 3.1 Matter
- 3.2 Matter is made of particles
- 3.3 How do Solids‚ liquids and gases behave?
- 3.4 Melting‚ Freezing‚ and boiling
- 3.5 Melting in different solids
- 3.6 Melting and boiling points
- Check your progress
- UNIT 4: Sound
- 4.1 Sound travels through the materials
- 4.2 Sound travels through different materials
- 4.3 How sound travels?
- 4.4 Loud and soft sounds
- 4.5 Sound volume
- 4.6 Muffling sounds
- 4.7 High and low sounds
- 4.8 Pitch on percussion instruments
- 4.9 Having fun with wind instruments
- Check your progress
- UNIT 5: Electricity and magnetism
- 5.1 Electricity flows in circuits
- 5.2 Components and a simple circuit
- 5.3 Switches
- 5.4 Circuits with more components
- 5.5 Circuits with more buzzers
- 5.6 Mains electricity
- 5.7 Magnets in everyday life
- 5.8 Magnetic poles
- 5.9 Strength of magnets
- 5.10 Which metals are magnetic?
- Check your progress
- Reference