3. Then, weweretoldaboutsomeplanets. Westartedwith Venus, thesecondclosesttotheSun. Itsatmosphereismade up of 97% carbondioxide. In thenextexperimentweblew up a balloonwithout air! Wemixedbaking soda and vinegar.
4. AfterthatwelearntaboutMars. It has thelargestvolcano in the Solar System, theOlympus Mons. Mars has ice caps at bothitsnorth and southpoles. Wewereshowndry ice!! Dry ice isfrozencarbondioxide. Look!