A placebo is a substance that is unlikely to affect the dependent variable.

a. True

b. False

What would happen of scientific knowledge was not debated and confirmed by scientist?

Red A balloon has a negative charge. A glass rod has a positive charge. What will happen when the glass rod is brought near the balloon? balloon + glass + + rod O The balloon will be attracted to the rod.

How are sedimentary rocks formed?

How reactive is an atom of Sodium (na) and why?

After 252 days, a 12.0-g sample of the radioisotope scandium-46 contains only 1.5 g of the isotope. what is the half-life of scandium-46

What compares a law and a theory?

Explain what domain would best be represented by the "?" in the diagram. A) Eukarya because the organisms are all eukaryotic. B) Eukarya because the organisms are all prokaryotic. C) Bacteria because some of the organisms are autotrophs.

If you are eating a hamburger, it is an example of a consumer eating another consumer. a) true b) false

What mass of NaNO3 is needed to make 3.5 L of 2.2 M solution? (Na = 23.0g, N=14.0g, O=16.0g) Explain in steps

In which group do all atoms have seven valence electrons in the ground state?