Fill in the blank. A ___ is a substance that cannot be separated into simpler substances by physical or mechanical methods such as filtering, boiling, or sifting

How do plants particapate in energy transformations?

Conductors have (blank) resistance. Moderate. Very High. Very low.

When matter and energy change forms within a closed system, A. the total amount of matter changes, but the total amount of energy does not. B. the total amount of energy changes, but the total amount of matter does not. C.

What is the difference between a white and red reaction integumentary system?

What is the chemical formula of magnesium bromide?

What is the mass of 9 atom (s) of copper in grams?

Andy has two samples of liquids. Sample A has pH of 4, and sample B has a pH of 6. what can Andy conclude about these two samples? Sample A is a neutral b alkali c acidic Sample B is a neutral b alkali c acidic

How does a lone pair contribute to molecular shape? A. It is too small to affect the molecule's shape. B. It takes up space like an "invisible" atom. C. It forces the molecule into a tetrahedral shape. D. It lets the bonding pairs spread out more.

The are of a rectangle is 12 in^2. what is the area in cm^2. there are 2.54cm in an inch.

Which statements describe advantages of models? Check all that apply. Models make it possible to easily notice patterns. Models can be used to communicate and test design ideas. Models allow scientists to predict relationships.