1) What is the coldest layer of the atmosphere? a) Mesosphere b) Troposphere c) Statosphere d) Thermosphere 2) What is not a layer of soil? a) Bedrock b) Toprock c) Topsoil d) Subsoil 3) What is shown in the figure? a) Plant tissue b) Animal cells c) Cheekcells d) Chickcells 4) Who is the invertebrates a) b) c) d) 5) Which mirror is using in side mirrors of vehicles? a) Concave b) Plane c) Gold d) Convex

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