1) Identify a mixture among the following: a) Fruit salad b) Water 2) You can separate sand and iron fillings by ………………………… a) evaporation b) using a magnet 3) In a solution that contains salt and water, salt is the …………………… a) solute b) solvent 4) In a saltwater solution, what is the solvent? a) water b) salt 5) A ………………….. is a mixture in which substances are spread out evenly and do not settle to the bottom of the container. a) Solution b) mixture 6) How can you make a solute dissolve faster? a) Stir or heat it b) Leave it still 7) Salty water can be separated through evaporation. a) True b) False 8) Grinding a solid into smaller pieces in solution will help it to dissolve faster. a) True b) False 9) Solvent is the substance in which the solute is being dissolved. Solvent is the substance in which the solute is being dissolved.   a) True b) False 10) You cannot separate a mixture once it is created. a) True b) False 11) The sphere that is composed of all living things is called ……………… a) atmosphere b) biosphere 12) The Earth system that includes soil, rocks and minerals of the Earth is called ……………… a) geosphere b) biosphere 13) Earth is made of …………. major systems. a) four b) five 14) Each ………………….. is a collection of parts that work together. a) process b) system 15) Lakes, rivers, streams, and oceans belong to ……………… a) hydrosphere b) atmosphere 16) The ……………….…….is the layer of mixed gases that surrounds Earth. a) hydrosphere b) atmosphere 17) Most of the water in earth’s hydrosphere is …………………. a) salty water b) fresh water 18) The geosphere is the earth system that includes all living things. a) true b) false 19) Jupitar is the only planet that has a biosphere. a) true b) false 20) Animals that dig in the ground interact with the geosphere. a) true b) false 21) The mantle makes up about 84%of Earth’s total volume. a) true  b) false  22) The hydrosphere is the Earth’s system that includes all living things. a) true b) false 23) Hydrosphere and atmosphere constantly interact . a) true b) false 24) Hurricanes are natural disasters caused by the interaction between the atmosphere and  hydrosphere. a) true b) false 25) The most plentiful gases are ……………… and oxygen. a) hydrogen b) nitrogen

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