1) what is the atmosphere? a) clouds that form in the air b) a layer of gases that surrounds the earth c) global warming 2) How do clouds form? a) precipitation b) evaporation c) condensation d) transpiration 3) How many layers are in the atmosphere? a) 7 b) 4 c) 5 d) 6 4) What is the last layer in the atmosphere? a) Mesosphere b) Exosphere c) Thermosphere d) Troposphere 5) What is the first layer in the atmosphere? a) Stratosphere b) ozone c) Troposphere d) Mesosphere 6) What element is found most in the atmosphere? a) Nitrogen b) Oxygen c) Helium

5.1 Atmosphere

由
嵌入

排行榜

视觉风格

选项

切换模板

恢复自动保存：？