Is a tree burning a chemical or physical change

Water sitting in a raised container has kinetic, nuclear, or potential

Christy wants to find out if the birds that visit the bird feeders in her backyard would rather build nests in birdhouses or in trees.

What is the value of in a spontaneous reaction?

A saturated solution is made by dissolving a 23.5g of solute/100.0g of water at 20°. How many grams of solute would be needed to dissolve in 65.0g of water to make a saturated solution?

What are 2 examples of materials that cells must enter or leave in order for a cell to survive?

2) Which of the following is a true statement? A: All the atoms of an element must be identical. B: Compounds may be separated by physical means. C: Mixtures may not be separated. D: Homogeneous is one type of compound.

How to tell the difference between ionic and covalent bonding?

The combustion of propane may be described by the chemical equation C3H8 (g) + 5O2 (g) ⟶3CO2 (g) + 4H2O (g) C3H8 (g) + 5O2 (g) ⟶3CO2 (g) + 4H2O (g) How many grams of O2 (g) O2 (g) are needed to completely burn 83.3 g C3H8 (g) ?

Was the relationship among temperature, heat, and thermal energy?

What will most likely happen when a warmer air mass exists above a polar ice sheet? The temperature of the ice sheet will be lowered. Heat will be transferred from the air mass to the ice. The air mass will exert high pressure and rise upwards.