Which of the following is responsible for the exchange of gases in a leaf? the phloem the spongy mesophyll the stomata

The kilogram is the SI unit for mass. True False

How is soil like a sponge?

What defines an exothermic reaction? O A. A reaction that needs heat added O B. A reaction that possesses enthalpy O c. A reaction that relies on collisions O D. A reaction that produces heat

What characteristic of metals makes them good electrical conductors?

Which compound has the greatest percent composition by mass of sulfur?

Which is a pure substance A) mixture B) solution C) element

Samuel adds a teaspoon of salt to a glass of water. He notices that the song disappears. Samuel takes a sip to discover that the water taste salty. What kind of change has occurred?

How are the physical and chemical properties of atoms represented on the periodic table of elements

how do we know isotopes exist?

Is albinism a dominant or recessive trait