Vocabulary Review
- liquid
- solution
- chemical changes
- molecule
- physical changes
- gas
- element
- compound
Science Concepts
- A
- D
- A
- C
- D
- B
- A
- C
- B
- C
- A
- D
Apply Inquiry and Review the Big Idea
- Sample answer: Kym’s independent variable was water temperature (what she changed). Her dependent variable was the rate at which the sugar dissolved. Kym did not label her beakers correctly, because sugar in the beaker with hot water would have dissolved fastest.
- Sample answer:Drawing 1 shows the particles in a gas, which are very far apart and move very quickly. Drawing 2 shows the particles in a solid. These particles are tightly packed. Drawing 3 shows the particles in a liquid. They are closer together than particles in a gas and move more slowly than particles in a gas.
- The tea and sodas are solutions because the components are evenly mixed. The juice is a mixture because it contains a liquid and some solids (the pulp). The sandwiches, trail mix, and gelatin are also mixtures because the components are not evenly distributed throughout.
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