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- 1Which statements are true about physical changes?Physical changes are easily reversible.
This is when atoms of an object change their state.
This is when there are changes between being a solid, liquid, or gas. - 2What are "nucleons"?Protons and neutrons
- 3What are some examples of chemical changes?Wood burning and losing mass.
Steel wool burning and gaining mass. - 4What is the symbol for helium?he
- 5What is the symbol for hydrogen?h
- 6Which statements are true?Hydrogen atoms are almost never found alone.
Hydrogen atoms can bond to another element. - 7Which statements are true about thermal energy?Thermal energy is an example of kinetic energy.
Thermal energy results in an object having a measurable temperature.
Thermal energy includes the motion of particles. - 8All matter is made up of atoms, and atoms often formmolecules or bonds, either word would fit correctly
- 9What is hydrogen made of?1 Proton and 1 Electron
- 10Hydrogen is not chemically stable, becauseits single electron is alone
- 11Photosynthesis takes water and carbon dioxide from the air and turns it intoglucose (solid) , oxygen (gas)
- 12Makes matter seem solidThe repulsion of electron clouds within atoms
- 13Chemical bondThe sharing of electrons to make two atoms chemically stable
- 14GlucoseA complex carbohydrate containing carbon
- 15Activation energyRequired to destabilize existing chemical bonds
- 16When wood is burned, explain each of the following.a. How is oxygen related to the wood burning process?
- 17Oxygen is needed for the wood to burn. It combines with wood in the reaction.b. How is carbon dioxide related to the wood burning process
- 18Carbon dioxide is produced in the chemical reactionc. How is heat related to the wood burning process
- 19Heat is emitted in the reaction.d. How is light related to the wood burning process?
- 20d. How is light related to the wood burning process?Light emitted in the reaction.
- 21which of these is emitted when wood is burnedcarbon dioxide and energy
- 22—
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- Fichas sobre Sin título, creado por Jake Rojas el 07/03/2023.
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