1.A chemical change is different than a physical change because in a chemical change a. Chemicals are used

b. Molecules do not physically touch

c. A new substance is formed and in a physical change no new substance is formed

d. The change can be seen but in a physical change it cannot

2.Which of the following is a physical change?

a. Burning

b. Freezing

c. Rusting

d. Oxidation

3.Jamal combined baking soda and vinegar, but he is having trouble determining if what he observed is a chemical reaction or a physical change. Choose two answers that demonstrate evidence of a chemical change?

a. Change in color

b. Absorption of heat

c. No change on properties

d. Formation of new substances

4. In a chemical reaction, if the reactants are heated, the reaction usually happens

a. Faster

b. Slower

c. At the same rate

d. In a smaller volume

Explain why your answer is correct:

Which perminant civil rights leader would have disagreed most with washington's approach to solving the problem of racial inequality in the south?

Explain why the judicial branch is considered the weakest branch. explain what might happen if the judicial branch could not separate itself from the other two branches. explain how a strong judiciary branch would maintain limited government and individual rights. explain why a law that contradicts the constitution must be ruled invalid. explain why the legislature may not determine if its laws are unconstitutional. hamilton argues that the judicial branch is not above the legislative branch. explain his reasoning. how is the problem solved when two laws passed by the same legislature contradict each other? explain why hamilton believes it is pointless to argue the power of judicial review will enable judges to rule in ways that serve their own interests. explain how life tenure is necessary for the judicial branch to be able to protect individual rights against a majority. explain how everyone benefits when the rights of individuals or groups are protected. explain how limited terms of office might discourage the best-qualified people.

Which of the following studies is linked most directly to the establishment of the national research act in 1974 and ultimately to the belmont report and federal regulations for human subject protection? a. the public health service tuskegee study of untreated syphilis in the negro male.b. stanford prison experiment (zimbardo).c. tearoom trade study (humphreys).d. the harvard t3 study.