Warm ups
Science TAKS – 6th period
8/31/09 – 9/4/09
1. Imagine that you have 2 cubes of different unknown materials. The cubes are exactly the same in size, shape and volume. You are conduction experiment in order to determine information about the cubes. You place the 1st cube in water and it floats. What can you expect the second cube to do in water?
a. It will float
b. It will sink
c. It will float only if its sizes does not change
d. You cannot know what the second cube will do
2. You are given 2 unknown liquids and are asked to determine which one’s molecules have the highest average kinetic energy. Since directly measuring the kinetic energy of molecules is very difficult, what should you measure in order to determine which of the 2 liquids has the higher average kinetic energy?
a. Density
b. Temperature
c. Weight
d. Mass
3. When a solid melts, it changes from a solid to a liquid. As this change occurs, which of the following does NOT happen to the molecules?
a. Their average kinetic energy increases
b. Their average motion increases
c. They form new bonds between molecules
d. They become less closely packed
4. Which of the following is a chemical change?
a. Melting an ice cube
b. Shredding paper
c. Burning a log
d. Dissolving salt in water
5. Elements have many characteristics that make them unique. One of these characteristics is that the atom has no net charge. This is determined by the relative amounts of certain parts of the atom. Which atomic components keep the atom electrically neutral?
a. Protons and neutrons
b. Protons and electrons
c. Electrons and neutrons
d. Neutrons and nucleus
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