what powers dot the sate gov. and the federal gov. share?

Do you mean --

What powers do the state government and the federal government share?

Check this site.

http://usgovinfo.about.com/od/rightsandfreedoms/a/federalism.htm

why is it sometimes necessary to judge what is a cause or an affect?

To find out the powers that both the state government and the federal government share, you would need to refer to the United States Constitution. The Constitution outlines the powers of the federal government in Article I, Section 8, and it also establishes the concept of federalism, where power is divided between the federal government and the state governments.

Here are some powers that both levels of government share:

1. Taxation: Both state and federal governments have the power to impose and collect taxes from individuals and businesses.

2. Establishing Courts: Both levels of government have the authority to establish and maintain their own court systems.

3. Enforcing Laws: Both state and federal governments are responsible for enforcing laws within their respective jurisdictions. This includes the ability to investigate crimes, make arrests, and prosecute offenders.

4. Borrowing Money: Both state and federal governments have the power to borrow money in order to fund government operations or projects.

5. Spending Money: Both levels of government have the authority to spend money on various programs, services, and infrastructure projects.

6. Regulating Commerce: The federal government has the power to regulate interstate commerce (trade between states), but state governments have the authority to regulate commerce within their own borders.

7. Education: Although education is primarily a responsibility of state governments, the federal government exercises some influence through legislation, funding, and setting certain educational standards.

It is important to note that the powers of the federal government are more extensive and cover a broader range of issues compared to those of the state governments. Additionally, the exact balance of power between the federal and state governments has been a subject of debate throughout U.S. history.